Ford Escape Manuals
Ford Escape 2020-2024 Service Manual / Powertrain / Engine / Fuel Charging and Controls / Diagnosis and Testing - Air/Fuel Ratio

Ford Escape: Fuel Charging and Controls / Diagnosis and Testing - Air/Fuel Ratio

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


Module DTC Description Action
PCM P0030:00 HO2S Heater Control Circuit (Bank 1, Sensor 1): No Sub Type Information GO to Pinpoint Test DW
PCM P0030:00 HO2S Heater Control Circuit (Bank 1, Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0036:00 HO2S Heater Control Circuit (Bank 1, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0037:00 HO2S Heater Control Circuit Low (Bank 1, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0038:00 HO2S Heater Control Circuit High (Bank 1, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0040:00 Oxygen Sensor Signals Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P0041:00 Oxygen Sensor Signals Swapped Bank 1 Sensor 2 / Bank 2 Sensor 2: No Sub Type Information GO to Pinpoint Test DW
PCM P0050:00 HO2S Heater Control Circuit (Bank 2, Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0053:00 HO2S Heater Resistance (Bank 1, Sensor 1): No Sub Type Information GO to Pinpoint Test DW
PCM P0053:00 HO2S Heater Resistance (Bank 1, Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0054:00 HO2S Heater Resistance (Bank 1, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0056:00 HO2S Heater Control Circuit (Bank 2, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0059:00 HO2S Heater Resistance (Bank 2, Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0060:00 HO2S Heater Resistance (Bank 2, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P00D2:00 HO2S Heater Control Circuit Range/Performance (Bank 1 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0130:00 O2 Sensor Circuit (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DW
PCM P0130:00 O2 Sensor Circuit (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0131:00 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DW
PCM P0131:00 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0132:00 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DW
PCM P0132:00 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0133:00 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DW
PCM P0133:00 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0134:00 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DW
PCM P0134:00 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0135:00 O2 Sensor Heater Circuit (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DW
PCM P0135:00 O2 Sensor Heater Circuit (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0136:00 O2 Sensor Circuit (Bank 1 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0137:00 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0138:00 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0139:00 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P013A:00 O2 Sensor Slow Response - Rich to Lean (Bank 1 and Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P013B:00 O2 Sensor Slow Response - Lean to Rich (Bank 1, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P013C:00 O2 Sensor Slow Response - Rich to Lean (Bank 2, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P013E:00 O2 Sensor Delayed Response - Rich to Lean (Bank 1 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0140:00 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0141:00 O2 Sensor Heater Circuit (Bank 1 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P014A:00 O2 Sensor Delayed Response - Rich to Lean (Bank 2 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0150:00 O2 Sensor Circuit (Bank 2 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0151:00 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0152:00 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0153:00 O2 Sensor Circuit Slow Response (Bank 2 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0154:00 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0155:00 O2 Sensor Heater Circuit (Bank 2 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P0157:00 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0158:00 O2 Sensor Circuit High Voltage (Bank 2 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0159:00 O2 Sensor Circuit Slow Response (Bank 2 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P0161:00 O2 Sensor Heater Circuit (Bank 2 Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P016A:00 Excessive Time To Enter Closed Loop Air/Fuel Ratio Control: No Sub Type Information GO to Pinpoint Test DW
PCM P0171:00 System Too Lean Bank 1: No Sub Type Information GO to Pinpoint Test H
PCM P0172:00 System Too Rich Bank 1: No Sub Type Information GO to Pinpoint Test H
PCM P0174:00 System Too Lean Bank 2: No Sub Type Information GO to Pinpoint Test H
PCM P0175:00 System Too Rich Bank 2: No Sub Type Information GO to Pinpoint Test H
PCM P064D:00 Internal Control Module O2 Sensor Processor Performance - Bank 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P064E:00 Internal Control Module O2 Sensor Processor Performance - Bank 2: No Sub Type Information GO to Pinpoint Test DZ
PCM P1127:00 Exhaust Temperature Out of Range, O2 Sensor Tests Not Completed: No Sub Type Information GO to Pinpoint Test DZ
PCM P1137:00 Lack Of HO2S12 Switches - Sensor Indicates Lean: No Sub Type Information GO to Pinpoint Test H
PCM P1138:00 Lack Of HO2S12 Switches - Sensor Indicates Rich: No Sub Type Information GO to Pinpoint Test H
PCM P1157:00 Lack Of HO2S22 Switches - Sensor Indicates Lean: No Sub Type Information GO to Pinpoint Test H
PCM P1158:00 Lack Of HO2S22 Switches - Sensor Indicates Rich: No Sub Type Information GO to Pinpoint Test H
PCM P1646:00 Linear O2 Sensor Control Chip (Bank 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P1647:00 Linear O2 Sensor Control Chip (Bank 2): No Sub Type Information GO to Pinpoint Test DZ
PCM P164A:00 O2 Sensor Positive Current Trim Circuit Performance (Bank 1 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P164B:00 O2 Sensor Positive Current Trim Circuit Performance (Bank 2 Sensor 1): No Sub Type Information GO to Pinpoint Test DZ
PCM P2096:00 Post Catalyst Fuel Trim System Too Lean Bank 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2097:00 Post Catalyst Fuel Trim System Too Rich Bank 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2098:00 Post Catalyst Fuel Trim System Too Lean Bank 2: No Sub Type Information GO to Pinpoint Test DZ
PCM P2099:00 Post Catalyst Fuel Trim System Too Rich Bank 2: No Sub Type Information GO to Pinpoint Test DZ
PCM P2195:00 O2 Sensor Signal Biased/Stuck Lean - Bank 1, Sensor 1: No Sub Type Information GO to Pinpoint Test H
PCM P2196:00 O2 Sensor Signal Biased/Stuck Rich - Bank 1, Sensor 1: No Sub Type Information GO to Pinpoint Test H
PCM P2197:00 O2 Sensor Signal Biased/Stuck Lean - Bank 2, Sensor 1: No Sub Type Information GO to Pinpoint Test H
PCM P2198:00 O2 Sensor Signal Biased/Stuck Rich - Bank 2, Sensor 1: No Sub Type Information GO to Pinpoint Test H
PCM P219A:00 Bank 1 Air-Fuel Ratio Imbalance: No Sub Type Information GO to Pinpoint Test H
PCM P219B:00 Bank 2 Air-Fuel Ratio Imbalance: No Sub Type Information GO to Pinpoint Test H
PCM P219C:00 Cylinder 1 Air-Fuel Ratio Imbalance: No Sub Type Information GO to Pinpoint Test H
PCM P219D:00 Cylinder 2 Air-Fuel Ratio Imbalance: No Sub Type Information GO to Pinpoint Test H
PCM P219E:00 Cylinder 3 Air-Fuel Ratio Imbalance: No Sub Type Information GO to Pinpoint Test H
PCM P219F:00 Cylinder 4 Air-Fuel Ratio Imbalance: No Sub Type Information GO to Pinpoint Test H
PCM P21A0:00 Cylinder 5 Air-Fuel Ratio Imbalance: No Sub Type Information GO to Pinpoint Test H
PCM P21A1:00 Cylinder 6 Air-Fuel Ratio Imbalance: No Sub Type Information GO to Pinpoint Test H
PCM P2237:00 O2 Sensor Positive Current Control Circuit/Open - Bank 1, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2240:00 O2 Sensor Positive Current Control Circuit/Open - Bank 2, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2243:00 O2 Sensor Reference Voltage Circuit/Open - Bank 1, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2247:00 O2 Sensor Reference Voltage Circuit/Open - Bank 2, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2251:00 O2 Sensor Negative Current Control Circuit/Open - Bank 1, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2254:00 O2 Sensor Negative Current Control Circuit/Open - Bank 2, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2270:00 O2 Sensor Signal Stuck Lean - Bank 1, Sensor 2: No Sub Type Information GO to Pinpoint Test DW
PCM P2270:00 O2 Sensor Signal Stuck Lean - Bank 1, Sensor 2: No Sub Type Information GO to Pinpoint Test H
PCM P2271:00 O2 Sensor Signal Stuck Rich - Bank 1, Sensor 2: No Sub Type Information GO to Pinpoint Test DW
PCM P2271:00 O2 Sensor Signal Stuck Rich - Bank 1, Sensor 2: No Sub Type Information GO to Pinpoint Test H
PCM P2272:00 O2 Sensor Signal Stuck Lean - Bank 2, Sensor 2: No Sub Type Information GO to Pinpoint Test DW
PCM P2272:00 O2 Sensor Signal Stuck Lean - Bank 2, Sensor 2: No Sub Type Information GO to Pinpoint Test H
PCM P2273:00 O2 Sensor Signal Stuck Rich - Bank 2, Sensor 2: No Sub Type Information GO to Pinpoint Test DW
PCM P2273:00 O2 Sensor Signal Stuck Rich - Bank 2, Sensor 2: No Sub Type Information GO to Pinpoint Test H
PCM P2297:00 O2 Sensor Out of Range During Deceleration Bank 1, Sensor 1: No Sub Type Information GO to Pinpoint Test DW
PCM P2626:00 O2 Sensor Positive Current Trim Circuit/Open Bank 1 Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2627:00 O2 Sensor Positive Current Trim Circuit Low Bank 1, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2628:00 O2 Sensor Positive Current Trim Circuit High Bank 1, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2629:00 O2 Sensor Positive Current Trim Circuit/Open Bank 2 Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2630:00 O2 Sensor Positive Current Trim Circuit Low Bank 2, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2631:00 O2 Sensor Positive Current Trim Circuit High Bank 2, Sensor 1: No Sub Type Information GO to Pinpoint Test DZ
PCM P2A01:00 O2 Circuit Range/Performance (Bank 1, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P2A04:00 O2 Circuit Range/Performance (Bank 2, Sensor 2): No Sub Type Information GO to Pinpoint Test DW
PCM P2BEC:00 Fuel Control System 'A' Too Lean Bank 1: No Sub Type Information GO to Pinpoint Test H
PCM P2BED:00 Fuel Control System 'A' Too Rich Bank 1: No Sub Type Information GO to Pinpoint Test H
PCM P2BEE:00 Fuel Control System 'A' Too Lean Bank 2: No Sub Type Information GO to Pinpoint Test H
PCM P2BEF:00 Fuel Control System 'A' Too Rich Bank 2: No Sub Type Information GO to Pinpoint Test H
PCM P2BF0:00 Fuel Control System 'B' Too Lean Bank 1: No Sub Type Information GO to Pinpoint Test H
PCM P2BF1:00 Fuel Control System 'B' Too Rich Bank 1: No Sub Type Information GO to Pinpoint Test H
PCM P2BF2:00 Fuel Control System 'B' Too Lean Bank 2: No Sub Type Information GO to Pinpoint Test H
PCM P2BF3:00 Fuel Control System 'B' Too Rich Bank 2: No Sub Type Information GO to Pinpoint Test H

Symptom Chart

Symptom Possible Sources Action
  • The engine runs rough.
  • Refer to the pinpoint test.
  • GO to Pinpoint Test DZ
  • The engine has a surge.
  • Refer to the pinpoint test.
  • GO to Pinpoint Test H

Pinpoint Tests


PINPOINT TEST DW: HEATED OXYGEN SENSOR (HO2S)
Introduction

  WARNING: While conducting tests on a hot engine take all safety precautions to prevent skin contact with hot engine components. Failure to follow these instructions may result in personal injury.

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P0030:00 HO2S Heater Control Circuit (Bank 1, Sensor 1): No Sub Type Information Sets when the PCM detects the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm. The PCM controls the heater ON and OFF duty cycle to maintain a calibrated temperature.
PCM P0036:00 HO2S Heater Control Circuit (Bank 1, Sensor 2): No Sub Type Information Sets when the PCM detects the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm. The PCM controls the HO2S bank 1, sensor 2 heater ON and OFF duty cycle to maintain a calibrated temperature.
PCM P0037:00 HO2S Heater Control Circuit Low (Bank 1, Sensor 2): No Sub Type Information Sets when the PCM detects the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm. The PCM controls the HO2S bank 1, sensor 2 heater ON and OFF duty cycle to maintain a calibrated temperature.
PCM P0038:00 HO2S Heater Control Circuit High (Bank 1, Sensor 2): No Sub Type Information Sets when the PCM detects the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm. The PCM controls the HO2S bank 1, sensor 2 heater ON and OFF duty cycle to maintain a calibrated temperature.
PCM P0041:00 Oxygen Sensor Signals Swapped Bank 1 Sensor 2 / Bank 2 Sensor 2: No Sub Type Information Sets when the PCM detects there is no response from the HO2S being tested. The HO2S monitor determines if the HO2S signal response for a fuel shift corresponds to the correct engine bank. Connect the HO2S connector to the correct bank.
PCM P0053:00 HO2S Heater Resistance (Bank 1, Sensor 1): No Sub Type Information Sets when the PCM detects the heater current requirements are too low or too high in the HTR11 circuit.
PCM P0054:00 HO2S Heater Resistance (Bank 1, Sensor 2): No Sub Type Information Sets when the PCM detects the heater current requirements are too low or too high in the HTR12 circuit.
PCM P0056:00 HO2S Heater Control Circuit (Bank 2, Sensor 2): No Sub Type Information Sets when the PCM detects the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm. The PCM controls the HO2S bank 2, sensor 2 heater ON and OFF duty cycle to maintain a calibrated temperature.
PCM P0060:00 HO2S Heater Resistance (Bank 2, Sensor 2): No Sub Type Information Sets when the PCM detects the heater current requirements are too low or too high in the HTR22 circuit.
PCM P00D2:00 HO2S Heater Control Circuit Range/Performance (Bank 1 Sensor 2): No Sub Type Information Sets when the PCM detects the internal impedance of the heated oxygen sensor bank 1, sensor 2 exceeds the calibrated threshold.
PCM P0130:00 O2 Sensor Circuit (Bank 1 Sensor 1): No Sub Type Information Sets when the PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas.
PCM P0131:00 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1): No Sub Type Information Sets when the PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas. An engine stall condition or an extremely rich air to fuel ratio may set this DTC . Diagnose any engine stall or rich air to fuel ratio concerns before diagnosing this DTC .
PCM P0132:00 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1): No Sub Type Information Sets when the PCM detects an over voltage concern is detected with one of the circuits used to determine the oxygen content in the exhaust gas.
PCM P0133:00 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1): No Sub Type Information Sets when the PCM detects the oxygen sensor signal does not reach the predicted amplitude within a predetermined response time. The PCM monitors oxygen sensor response time by commanding a calibrated fuel control routine. This routine sets the air fuel ratio to a calibrated limit to produce a predictable oxygen sensor signal amplitude.
PCM P0134:00 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1): No Sub Type Information Sets when the PCM does not detect movement in the sensor signal while the air to fuel ratio is oscillating. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air to fuel ratio attempting to detect some movement in the signal value.
PCM P0135:00 O2 Sensor Heater Circuit (Bank 1 Sensor 1): No Sub Type Information Sets when the PCM detects an open, a short or the heater current draw exceeds a calibrated limit.
PCM P0136:00 O2 Sensor Circuit (Bank 1 Sensor 2): No Sub Type Information Sets when the PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas.
PCM P0137:00 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2): No Sub Type Information Sets when the PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas.
PCM P0138:00 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2): No Sub Type Information Sets when the PCM detects an over voltage condition is present on the HO2S12 circuit.
PCM P0139:00 O2 Sensor Circuit Slow Response (Bank 1 Sensor 2): No Sub Type Information Sets when the PCM detects it is at the allowable limit or has exceeded an allowable length of time for fuel trim modification, without detecting an acceptable rate of voltage change. The HO2S monitor tracks the rate of voltage change during the rise and fall of the HO2S bank 1, sensor 2 (HO2S12) signal. When the rate of voltage change is less than a calibrated value, the PCM begins to modify the fuel trim attempting to increase the HO2S voltage switch rate.
PCM P013A:00 O2 Sensor Slow Response - Rich to Lean (Bank 1 and Sensor 2): No Sub Type Information Sets when the PCM detects the measured response rate is slower than the threshold value. This monitor is highly sensitive to exhaust leaks near the rear HO2S . The heated oxygen sensor monitor measures the response rate of the rear HO2S to a rich to lean transition. This monitor is highly sensitive to exhaust leaks near the rear HO2S . Check for leaks in the exhaust system.
PCM P013B:00 O2 Sensor Slow Response - Lean to Rich (Bank 1, Sensor 2): No Sub Type Information Sets when the PCM detects the measured value is slower than the threshold value. During a deceleration fuel shut-off event, the PCM monitors how quickly the HO2S bank 1, sensor 2 switches from lean to rich. The measured rate of the lean to rich switch is compared to a calibrated fault threshold value. The measured rate of the lean to rich switch is compared to a calibrated fault threshold value. Check for leaks in the exhaust system.
PCM P013C:00 O2 Sensor Slow Response - Rich to Lean (Bank 2, Sensor 2): No Sub Type Information Sets when the PCM detects the measured response rate is slower than the threshold value. This monitor is highly sensitive to exhaust leaks near the rear HO2S . The heated oxygen sensor monitor measures the response rate of the rear HO2S to a rich to lean transition. This monitor is highly sensitive to exhaust leaks near the rear HO2S . Check for leaks in the exhaust system.
PCM P013E:00 O2 Sensor Delayed Response - Rich to Lean (Bank 1 Sensor 2): No Sub Type Information Sets when the PCM , after three consecutive intrusive attempts, the cannot force the signal greater than the calibrated rich value. Also, if the signal voltage remains greater than the lean value after a calibrated amount of time with the fuel injectors off, a counter is incremented. This DTC also sets when after three consecutive occurrences the signal is not less than the calibrated lean value. During a deceleration fuel shut-off event, the PCM monitors the HO2S bank 1, sensor 2 signal to determine if the signal is stuck in range. The PCM expects the signal to exceed a calibrated rich or lean value within a calibrated amount of time. If the signal voltage remains less than the rich value after a number of occurrences, the PCM intrusively controls the fuel system rich over increasing time periods in an attempt to force the signal to greater than the calibrated rich value. Check for leaks in the exhaust system. Check for an intermittent HO2S12 or HO2S22 signal.
PCM P0140:00 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2): No Sub Type Information Sets when the PCM is unable to detect movement in the sensor signal while the air to fuel ratio is oscillating. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air to fuel ratio attempting to detect some movement in the signal value. An O2S12 PID switching across 0.45 volt from 0.2 to 0.9 volts indicates a normal switching HO2S .
PCM P0141:00 O2 Sensor Heater Circuit (Bank 1 Sensor 2): No Sub Type Information Sets when the PCM detects an open or short circuit is detected or the HO2S bank 1, sensor 2 heater current draw exceeds a calibrated limit.
PCM P014A:00 O2 Sensor Delayed Response - Rich to Lean (Bank 2 Sensor 2): No Sub Type Information Sets when the PCM , after three consecutive intrusive attempts, the cannot force the signal greater than the calibrated rich value. Also, if the signal voltage remains greater than the lean value after a calibrated amount of time with the fuel injectors off, a counter is incremented. This DTC also sets when after three consecutive occurrences the signal is not less than the calibrated lean value. During a deceleration fuel shut-off (DFSO) event, the PCM monitors the HO2S bank 2, sensor 2 signal to determine if the signal is stuck in range. The PCM expects the signal to exceed a calibrated rich or lean value within a calibrated amount of time. If the signal voltage remains less than the rich value after a number of occurrences, the PCM intrusively controls the fuel system rich over increasing time periods in an attempt to force the signal to greater than the calibrated rich value. Check for leaks in the exhaust system. Check for an intermittent HO2S12 or HO2S22 signal.
PCM P0157:00 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2): No Sub Type Information Sets when the PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas.
PCM P0158:00 O2 Sensor Circuit High Voltage (Bank 2 Sensor 2): No Sub Type Information Sets when the PCM detects an over voltage condition is present on the HO2S bank 2, sensor 2 circuit.
PCM P0159:00 O2 Sensor Circuit Slow Response (Bank 2 Sensor 2): No Sub Type Information Sets when the PCM detects it is at the allowable limit or has exceeded an allowable length of time for fuel trim modification, without detecting an acceptable rate of voltage change. The HO2S monitor tracks the rate of voltage change during the rise and fall of the HO2S bank 2, sensor 2 signal. When the rate of voltage change is less than a calibrated value, the PCM begins to modify the fuel trim attempting to increase the HO2S voltage switch rate.
PCM P0161:00 O2 Sensor Heater Circuit (Bank 2 Sensor 2): No Sub Type Information Sets when the PCM detects an open or short from the universal HO2S bank 2, sensor 2 heater circuit.
PCM P016A:00 Excessive Time To Enter Closed Loop Air/Fuel Ratio Control: No Sub Type Information Sets when the PCM detects it is at the allowable limit or has exceeded an allowable length of time for fuel trim modification, without detecting an acceptable rate of voltage change. The HO2S monitor tracks the rate of voltage change during the rise and fall of the HO2S signal. When the rate of voltage change is less than a calibrated value, the PCM begins to modify the fuel trim attempting to increase the HO2S voltage switch rate.
PCM P2270:00 O2 Sensor Signal Stuck Lean - Bank 1, Sensor 2: No Sub Type Information Sets when the PCM detects the HO2S bank 1, sensor 2 signal is less than the calibrated rich value during the current key cycle and, after three consecutive intrusive events, the signal cannot be forced greater than the calibrated rich value. Check for leaks in the exhaust system. Check for an intermittent HO2S12 signal.
PCM P2271:00 O2 Sensor Signal Stuck Rich - Bank 1, Sensor 2: No Sub Type Information Sets when the PCM detects the HO2S bank 1, sensor 2 signal is greater than the calibrated lean value during the current key cycle and, after three consecutive intrusive events, the signal cannot be forced less than the calibrated lean value. Check for leaks in the exhaust system. Check for an intermittent HO2S12 signal.
PCM P2272:00 O2 Sensor Signal Stuck Lean - Bank 2, Sensor 2: No Sub Type Information Sets when the PCM detects the HO2S bank 2, sensor 2 signal is less than the calibrated rich value during the current key cycle and, after three consecutive intrusive events, the signal cannot be forced greater than the calibrated rich value. Check for leaks in the exhaust system. Check for an intermittent HO2S22 signal.
PCM P2273:00 O2 Sensor Signal Stuck Rich - Bank 2, Sensor 2: No Sub Type Information This DTC sets when the HO2S bank 2, sensor 2 signal is greater than the calibrated lean value during the current key cycle and, after three consecutive intrusive events, the signal cannot be forced less than the calibrated lean value. Check for leaks in the exhaust system. Check for an intermittent HO2S22 signal.
PCM P2297:00 O2 Sensor Out of Range During Deceleration Bank 1, Sensor 1: No Sub Type Information Sets when the PCM detects the measured value for the HO2S bank 1, sensor 1 is slower than the measured value of the HO2S bank 1, sensor 2. During a deceleration fuel shut-off event, the PCM monitors how quickly the rear HO2S switches from rich to lean. The measured rate of the rich to lean switch is compared to a calibrated threshold value. The threshold value takes into account the level of oxygen in the catalyst, which has an impact on how quickly the rich to lean switch occurs. Check for leaks in the exhaust system.
PCM P2A01:00 O2 Circuit Range/Performance (Bank 1, Sensor 2): No Sub Type Information Sets when the PCM detects the HO2S bank 1, sensor 2 voltage is out of range low for a calibrated period of time.
PCM P2A04:00 O2 Circuit Range/Performance (Bank 2, Sensor 2): No Sub Type Information Sets when the PCM detects the HO2S bank 2, sensor 2 voltage is out of range low for a calibrated period of time.

Possible Sources

  • Aftermarket accessories or performance modifications
  • Exhaust leak
  • High exhaust temperature
  • Contaminated fuel
  • HO2S circuitry concern
  • MAF sensor (if equipped)
  • HO2S (9G444)
  • PCM (12A650)
PINPOINT TEST DZ: UNIVERSAL HEATED OXYGEN SENSOR (HO2S)
Introduction

NOTE: Only diagnose the suspect universal HO2S indicated by the DTC.

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P0030:00 HO2S Heater Control Circuit (Bank 1, Sensor 1): No Sub Type Information Sets when PCM detects the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm. The PCM controls the heater ON and OFF duty cycle to maintain a calibrated temperature.
PCM P0040:00 Oxygen Sensor Signals Swapped Bank 1 Sensor 1 / Bank 2 Sensor 1: No Sub Type Information Sets when PCM detects no response from the universal HO2S being tested. The HO2S monitor determines if the universal HO2S signal response for a fuel shift corresponds to the correct engine bank. Connect the universal HO2S connector to the correct bank.
PCM P0050:00 HO2S Heater Control Circuit (Bank 2, Sensor 1): No Sub Type Information Sets when PCM detects the sensor does not warm up to the required temperature in a calibrated amount of time. This DTC also sets when the PCM is not able to maintain the required temperature after the sensor is warm. The PCM controls the universal HO2S bank 2, sensor 1 heater ON and OFF duty cycle to maintain a calibrated temperature.
PCM P0053:00 HO2S Heater Resistance (Bank 1, Sensor 1): No Sub Type Information Sets when PCM detects the heater current requirements are too low or too high in the UO2SHTR11 circuit .
PCM P0059:00 HO2S Heater Resistance (Bank 2, Sensor 1): No Sub Type Information Sets when PCM detects the heater current requirements are too low or too high in the UO2SHTR21 circuit.
PCM P0130:00 O2 Sensor Circuit (Bank 1 Sensor 1): No Sub Type Information Sets when PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas.
PCM P0131:00 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 1): No Sub Type Information Sets when PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas. An engine stall condition or an extremely rich air to fuel ratio may set this DTC . Diagnose any engine stall or rich air to fuel ratio concerns before diagnosing this DTC . An engine stall condition or an extremely rich air to fuel ratio may set this DTC . Diagnose any engine stall or rich air to fuel ratio concerns before diagnosing this DTC .
PCM P0132:00 O2 Sensor Circuit High Voltage (Bank 1 Sensor 1): No Sub Type Information Sets when PCM detects an over voltage concern with one of the circuits used to determine the oxygen content in the exhaust gas.
PCM P0133:00 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1): No Sub Type Information Sets when PCM detects the oxygen sensor signal does not reach the predicted amplitude within a predetermined response time. The PCM monitors oxygen sensor response time by commanding a calibrated fuel control routine. This routine sets the air fuel ratio to a calibrated limit to produce a predictable oxygen sensor signal amplitude.
PCM P0134:00 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1): No Sub Type Information Sets when PCM is unable to detect movement in the sensor signal while the air to fuel ratio is oscillating. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air to fuel ratio attempting to detect some movement in the signal value.
PCM P0135:00 O2 Sensor Heater Circuit (Bank 1 Sensor 1): No Sub Type Information Sets when PCM detects an open or short circuit is detected or the heater current draw exceeds a calibrated limit.
PCM P0150:00 O2 Sensor Circuit (Bank 2 Sensor 1): No Sub Type Information Sets when PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas.
PCM P0151:00 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 1): No Sub Type Information Sets when PCM detects a concern with one of the circuits used to determine the oxygen content in the exhaust gas. An engine stall condition or an extremely rich air to fuel ratio may set this DTC . Diagnose any engine stall or rich air to fuel ratio concerns before diagnosing this DTC . An engine stall condition or an extremely rich air to fuel ratio may set this DTC . Diagnose any engine stall or rich air to fuel ratio concerns before diagnosing this DTC .
PCM P0152:00 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1): No Sub Type Information Sets when PCM detects an over voltage concern with one of the circuits used to determine the oxygen content in the exhaust gas.
PCM P0153:00 O2 Sensor Circuit Slow Response (Bank 2 Sensor 1): No Sub Type Information Sets when PCM detects the oxygen sensor signal does not reach the predicted amplitude within a predetermined response time. The PCM monitors the universal HO2S bank 2, sensor 1 response time by commanding a calibrated fuel control routine. This routine sets the air to fuel ratio to a calibrated limit to produce a predictable oxygen sensor signal amplitude.
PCM P0154:00 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1): No Sub Type Information Sets when PCM detects no movement in the sensor signal while the air to fuel ratio is oscillating. If the sensor signal value is not changing from the default value, the PCM commands an oscillating air to fuel ratio attempting to detect some movement in the signal value.
PCM P0155:00 O2 Sensor Heater Circuit (Bank 2 Sensor 1): No Sub Type Information Sets when PCM detects an open circuit , a short circuit or the universal HO2S bank 2, sensor 1 heater current draw exceeds a calibrated limit.
PCM P064D:00 Internal Control Module O2 Sensor Processor Performance - Bank 1: No Sub Type Information Sets when PCM detects an internal circuit or communication concern. The PCM monitors the application specific integrated circuit that controls and monitors the universal heated oxygen sensor HO2S bank 1, sensor 1. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for intermittent universal HO2S wiring concerns. Check the universal HO2S wiring between the PCM and the sensor for damage. Check for aftermarket performance products. Reprogram or update the calibration. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test.
PCM P064E:00 Internal Control Module O2 Sensor Processor Performance - Bank 2: No Sub Type Information Sets when PCM detects an internal circuit or communication concern. The PCM monitors the application specific integrated circuit that controls and monitors the universal HO2S bank 2, sensor 1. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for intermittent universal HO2S wiring concerns. Check the universal HO2S wiring between the PCM and the sensor for damage. Check for aftermarket performance products. Reprogram or update the calibration. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test.
PCM P1127:00 Exhaust Temperature Out of Range, O2 Sensor Tests Not Completed: No Sub Type Information Sets when PCM detects the inferred exhaust temperature is below a minimum calibrated value. The DTC P1127 is present if the exhaust is not hot. The HO2S monitor uses an exhaust temperature model to determine when the universal HO2S heaters are cycled ON. Monitor the universal HO2S heater PIDs to determine the ON or OFF state. The DTC P1127 is present if the exhaust is not hot.
PCM P1646:00 Linear O2 Sensor Control Chip (Bank 1): No Sub Type Information Sets when PCM detects an internal circuit or communication concern. The PCM monitors the application specific integrated circuit that controls and monitors the universal HO2S bank 1, sensor 1. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for intermittent universal HO2S wiring concerns. Check the universal HO2S wiring between the PCM and the sensor for damage. Check for aftermarket performance products. Reprogram or update the calibration. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test.
PCM P1647:00 Linear O2 Sensor Control Chip (Bank 2): No Sub Type Information Sets when PCM detects an internal circuit or communication concern. The PCM monitors the application specific integrated circuit that controls and monitors the universal HO2S bank 2, sensor 1. Check for other Diagnostic Trouble Codes (DTCs) and diagnose those first. Check for intermittent universal HO2S wiring concerns. Check the universal HO2S wiring between the PCM and the sensor for damage. Check for aftermarket performance products. Reprogram or update the calibration. Clear the Diagnostic Trouble Codes (DTCs), repeat the self-test.
PCM P164A:00 O2 Sensor Positive Current Trim Circuit Performance (Bank 1 Sensor 1): No Sub Type Information Sets when PCM detects an inconsistent or erratic measurement of the resistor. A resistor is installed in the universal HO2S bank 1, sensor 1 connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value to compensate for the variance in the pumping current signal.
PCM P164B:00 O2 Sensor Positive Current Trim Circuit Performance (Bank 2 Sensor 1): No Sub Type Information Sets when PCM detects an inconsistent or erratic measurement of the resistor. A resistor is installed in the universal HO2S bank 2, sensor 1 connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value to compensate for the variance in the pumping current signal.
PCM P2096:00 Post Catalyst Fuel Trim System Too Lean Bank 1: No Sub Type Information Sets when PCM detects the correction value is greater than a calibrated limit. The PCM monitors the correction value from the HO2S bank 1, sensor 2 as part of the fore-aft oxygen sensor control routine.
PCM P2097:00 Post Catalyst Fuel Trim System Too Rich Bank 1: No Sub Type Information Sets when PCM detects the correction value is greater than a calibrated limit. The PCM monitors the correction value from the HO2S bank 1, sensor 2 as part of the fore-aft oxygen sensor control routine.
PCM P2098:00 Post Catalyst Fuel Trim System Too Lean Bank 2: No Sub Type Information Sets when PCM detects the correction value is greater than a calibrated limit. The PCM monitors the correction value from the HO2S bank 2, sensor 2 as part of the fore-aft oxygen sensor control routine.
PCM P2099:00 Post Catalyst Fuel Trim System Too Rich Bank 2: No Sub Type Information Sets when PCM detects the correction value is greater than a calibrated limit. The PCM monitors the correction value from the HO2S bank 2, sensor 2 as part of the fore-aft oxygen sensor control routine.
PCM P2237:00 O2 Sensor Positive Current Control Circuit/Open - Bank 1, Sensor 1: No Sub Type Information Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas.
PCM P2240:00 O2 Sensor Positive Current Control Circuit/Open - Bank 2, Sensor 1: No Sub Type Information Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas.
PCM P2243:00 O2 Sensor Reference Voltage Circuit/Open - Bank 1, Sensor 1: No Sub Type Information Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas.
PCM P2247:00 O2 Sensor Reference Voltage Circuit/Open - Bank 2, Sensor 1: No Sub Type Information Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas.
PCM P2251:00 O2 Sensor Negative Current Control Circuit/Open - Bank 1, Sensor 1: No Sub Type Information Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas.
PCM P2254:00 O2 Sensor Negative Current Control Circuit/Open - Bank 2, Sensor 1: No Sub Type Information Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas.
PCM P2626:00 O2 Sensor Positive Current Trim Circuit/Open Bank 1 Sensor 1: No Sub Type Information Sets when PCM detects the actual oxygen sensor voltage exceeds the maximum expected voltage threshold for a specified amount of time. During deceleration fuel shut-off the PCM monitors the integrity of the UO2SPCT11 circuit by comparing the actual oxygen sensor voltage signal to an expected oxygen sensor voltage signal.
PCM P2627:00 O2 Sensor Positive Current Trim Circuit Low Bank 1, Sensor 1: No Sub Type Information Sets when PCM detects the resistance value from the universal HO2S is too high. A resistor is installed in the universal HO2S connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value in order to compensate for the variance in the pumping current signal.
PCM P2628:00 O2 Sensor Positive Current Trim Circuit High Bank 1, Sensor 1: No Sub Type Information Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas.
PCM P2629:00 O2 Sensor Positive Current Trim Circuit/Open Bank 2 Sensor 1: No Sub Type Information Sets when PCM detects the actual oxygen sensor voltage exceeds the maximum expected voltage threshold for a specified amount of time. During deceleration fuel shut-off the PCM monitors the integrity of the UO2SPCT21 circuit by comparing the actual oxygen sensor voltage signal to an expected oxygen sensor voltage signal.
PCM P2630:00 O2 Sensor Positive Current Trim Circuit Low Bank 2, Sensor 1: No Sub Type Information Sets when PCM detects the resistance value from the universal HO2S is too high. A resistor is installed in the universal HO2S connector for part to part variance. The PCM determines the value of this resistor by taking multiple measurements of the resistor during each ignition ON event. The PCM uses this value in order to compensate for the variance in the pumping current signal.
PCM P2631:00 O2 Sensor Positive Current Trim Circuit High Bank 2, Sensor 1: No Sub Type Information Sets when PCM detects a concern with the circuit used to determine the oxygen content in the exhaust gas.

Possible Sources

  • HO2S circuitry concern
  • Exhaust leak
  • Intake air leak
  • Engine not operating long enough before carrying out the KOER self-test
  • MAF sensor (if equipped)
  • HO2S (9Y460)
  • PCM (12A650)
PINPOINT TEST H: FUEL CONTROL
Introduction

Normal Operation and Fault Conditions

Refer to the DTC Fault Trigger Conditions.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
PCM P0171:00 System Too Lean Bank 1: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a rich calibrated limit. Refer to Fuel Trim for additional information. The adaptive fuel strategy continuously monitors the fuel delivery hardware. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P0172:00 System Too Rich Bank 1: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a lean calibrated limit. Refer to Fuel Trim for additional information. The adaptive fuel strategy continuously monitors the fuel delivery hardware. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P0174:00 System Too Lean Bank 2: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a rich calibrated limit. Refer to Fuel Trim for additional information. The adaptive fuel strategy continuously monitors the fuel delivery hardware. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P0175:00 System Too Rich Bank 2: No Sub Type Information The adaptive fuel strategy continuously monitors the fuel delivery hardware. This DTC sets when the adaptive fuel tables reach a lean calibrated limit. Refer to Fuel Trim for additional information. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P1137:00 Lack Of HO2S12 Switches - Sensor Indicates Lean: No Sub Type Information Sets when PCM detects no output of the HO2S12 circuit in a calibrated amount of time. The HO2S bank 1, sensor 2 is forced rich and lean and monitored by the PCM .
PCM P1138:00 Lack Of HO2S12 Switches - Sensor Indicates Rich: No Sub Type Information Sets when PCM detects no output of the HO2S12 circuit in a calibrated amount of time. The HO2S bank 1, sensor 2 is forced rich and lean and monitored by the PCM .
PCM P1157:00 Lack Of HO2S22 Switches - Sensor Indicates Lean: No Sub Type Information Sets when PCM detects no output of the HO2S22 in a calibrated amount of time. The HO2S bank 2, sensor 2 is forced rich and lean and monitored by the PCM .
PCM P1158:00 Lack Of HO2S22 Switches - Sensor Indicates Rich: No Sub Type Information Sets when PCM detects no output of the HO2S22 in a calibrated amount of time. The HO2S bank 2, sensor 2 is forced rich and lean and monitored by the PCM .
PCM P2195:00 O2 Sensor Signal Biased/Stuck Lean - Bank 1, Sensor 1: No Sub Type Information Sets when PCM detects the fuel control system is not switching for a calibrated amount of time. A HO2S bank 1, sensor 1 indicating lean at the end of a test is trying to correct for an over lean condition.
PCM P2196:00 O2 Sensor Signal Biased/Stuck Rich - Bank 1, Sensor 1: No Sub Type Information Sets when PCM detects the fuel control system is not switching for a calibrated amount of time. A HO2S bank 1, sensor 1 indicating rich at the end of a test is trying to correct for an over rich condition.
PCM P2197:00 O2 Sensor Signal Biased/Stuck Lean - Bank 2, Sensor 1: No Sub Type Information Sets when PCM detects the fuel control system is not switching for a calibrated amount of time. A universal HO2S bank 2, sensor 1 indicating lean at the end of a test is trying to correct for an over lean condition.
PCM P2198:00 O2 Sensor Signal Biased/Stuck Rich - Bank 2, Sensor 1: No Sub Type Information Sets when PCM detects the fuel control system is not switching for a calibrated amount of time. A universal HO2S bank 2, sensor 1 indicating rich at the end of a test is trying to correct for an over rich condition.
PCM P219A:00 Bank 1 Air-Fuel Ratio Imbalance: No Sub Type Information Sets when PCM detects the air to fuel ratio difference per cylinder is greater than a calculated amount. The air to fuel imbalance monitor is designed to detect large differences in the air to fuel ratio between cylinders per engine bank.
PCM P219B:00 Bank 2 Air-Fuel Ratio Imbalance: No Sub Type Information Sets when PCM detects the air to fuel ratio difference per cylinder is greater than a calculated amount. The air to fuel imbalance monitor is designed to detect large differences in the air to fuel ratio between cylinders per engine bank.
PCM P219C:00 Cylinder 1 Air-Fuel Ratio Imbalance: No Sub Type Information Sets when PCM detects the minimal air to fuel ratio difference in cylinder 1 is greater than a calculated amount. The air to fuel ratio imbalance torque monitor is designed to detect minimal differences in the air to fuel ratio between cylinders. This DTC may be caused by other systems related to cylinder 1. Diagnose any other cylinder 1 related Diagnostic Trouble Codes (DTCs) first. The CKP sensor signal is very sensitive to electrical noise. Check the routing of the CKP sensor wiring harness.
PCM P219D:00 Cylinder 2 Air-Fuel Ratio Imbalance: No Sub Type Information Sets when PCM detects the minimal air to fuel ratio difference in cylinder 2 is greater than a calculated amount. The air to fuel ratio imbalance torque monitor is designed to detect minimal differences in the air to fuel ratio between cylinders. This DTC may be caused by other systems related to cylinder 2. Diagnose any other cylinder 1 related Diagnostic Trouble Codes (DTCs) first. The CKP sensor signal is very sensitive to electrical noise. Check the routing of the CKP sensor wiring harness.
PCM P219E:00 Cylinder 3 Air-Fuel Ratio Imbalance: No Sub Type Information Sets when PCM detects the minimal air to fuel ratio difference in cylinder 3 is greater than a calculated amount. The air to fuel ratio imbalance torque monitor is designed to detect minimal differences in the air to fuel ratio between cylinders. This DTC may be caused by other systems related to cylinder 3. Diagnose any other cylinder 1 related Diagnostic Trouble Codes (DTCs) first. The CKP sensor signal is very sensitive to electrical noise. Check the routing of the CKP sensor wiring harness.
PCM P219F:00 Cylinder 4 Air-Fuel Ratio Imbalance: No Sub Type Information Sets when PCM detects the minimal air to fuel ratio difference in cylinder 4 is greater than a calculated amount. The air to fuel ratio imbalance torque monitor is designed to detect minimal differences in the air to fuel ratio between cylinders. This DTC may be caused by other systems related to cylinder 4. Diagnose any other cylinder 1 related Diagnostic Trouble Codes (DTCs) first. The CKP sensor signal is very sensitive to electrical noise. Check the routing of the CKP sensor wiring harness.
PCM P21A0:00 Cylinder 5 Air-Fuel Ratio Imbalance: No Sub Type Information Sets when PCM detects the minimal air to fuel ratio difference in cylinder 5 is greater than a calculated amount. The air to fuel ratio imbalance torque monitor is designed to detect minimal differences in the air to fuel ratio between cylinders. This DTC may be caused by other systems related to cylinder 5. Diagnose any other cylinder 1 related Diagnostic Trouble Codes (DTCs) first. The CKP sensor signal is very sensitive to electrical noise. Check the routing of the CKP sensor wiring harness.
PCM P21A1:00 Cylinder 6 Air-Fuel Ratio Imbalance: No Sub Type Information Sets when PCM detects the minimal air to fuel ratio difference in cylinder 6 is greater than a calculated amount. The air to fuel ratio imbalance torque monitor is designed to detect minimal differences in the air to fuel ratio between cylinders. This DTC may be caused by other systems related to cylinder 6. Diagnose any other cylinder 1 related Diagnostic Trouble Codes (DTCs) first. The CKP sensor signal is very sensitive to electrical noise. Check the routing of the CKP sensor wiring harness.
PCM P2270:00 O2 Sensor Signal Stuck Lean - Bank 1, Sensor 2: No Sub Type Information Sets when PCM does not detect the output of the HO2S12 in a calibrated amount of time. The HO2S bank 1, sensor 2 is forced rich and lean and monitored by the PCM . Check for leaks in the exhaust system. Check for an intermittent HO2S12 signal.
PCM P2271:00 O2 Sensor Signal Stuck Rich - Bank 1, Sensor 2: No Sub Type Information Sets when PCM does not detect the output of the HO2S in a calibrated amount of time. The HO2S bank 1, sensor 2 is forced rich and lean and monitored by the PCM . Check for leaks in the exhaust system. Check for an intermittent HO2S12 signal.
PCM P2272:00 O2 Sensor Signal Stuck Lean - Bank 2, Sensor 2: No Sub Type Information Sets when PCM does not detect the output of the HO2S22 in a calibrated amount of time. The HO2S bank 2, sensor 2 is forced rich and lean and monitored by the PCM . Check for leaks in the exhaust system. Check for an intermittent HO2S22 signal.
PCM P2273:00 O2 Sensor Signal Stuck Rich - Bank 2, Sensor 2: No Sub Type Information Sets when PCM detects does not detect the output of the HO2S22 in a calibrated amount of time. The HO2S bank 2, sensor 2 is forced rich and lean and monitored by the PCM . Check for leaks in the exhaust system. Check for an intermittent HO2S22 signal.
PCM P2BEC:00 Fuel Control System 'A' Too Lean Bank 1: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a rich calibrated limit. The adaptive fuel strategy continuously monitors the fuel delivery hardware. Refer to Fuel Trim for additional information. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P2BED:00 Fuel Control System 'A' Too Rich Bank 1: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a lean calibrated limit. The adaptive fuel strategy continuously monitors the fuel delivery hardware. Refer to Fuel Trim for additional information. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P2BEE:00 Fuel Control System 'A' Too Lean Bank 2: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a rich calibrated limit. The adaptive fuel strategy continuously monitors the fuel delivery hardware. Refer to Fuel Trim for additional information. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P2BEF:00 Fuel Control System 'A' Too Rich Bank 2: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a lean calibrated limit. The adaptive fuel strategy continuously monitors the fuel delivery hardware. Refer to Fuel Trim for additional information. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P2BF0:00 Fuel Control System 'B' Too Lean Bank 1: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a rich calibrated limit. The adaptive fuel strategy continuously monitors the fuel delivery hardware. Refer to Fuel Trim for additional information. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P2BF1:00 Fuel Control System 'B' Too Rich Bank 1: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a lean calibrated limit. The adaptive fuel strategy continuously monitors the fuel delivery hardware. Refer to Fuel Trim for additional information. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P2BF2:00 Fuel Control System 'B' Too Lean Bank 2: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a rich calibrated limit. The adaptive fuel strategy continuously monitors the fuel delivery hardware. Refer to Fuel Trim for additional information. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.
PCM P2BF3:00 Fuel Control System 'B' Too Rich Bank 2: No Sub Type Information Sets when PCM detects the adaptive fuel tables reach a lean calibrated limit. The adaptive fuel strategy continuously monitors the fuel delivery hardware. Refer to Fuel Trim for additional information. View the freeze frame data to determine the operating conditions when the DTC was set. Observe the LONGFT1 and LONGFT2 PIDs.

Possible Sources

  • Aftermarket exhaust accessories or performance modifications
  • Ignition system concern
  • Exhaust leak concern
  • Intake air leak concern
  • Vacuum leak concern
  • PCV system concern
  • Contaminated fuel
  • Contaminated oil
  • Fuel filter
  • Air filter
  • HO2S circuitry concern
  • EVAP purge valve
  • Fuel line
  • EGR valve
  • EVAP purge valve
  • Fuel pump
  • MAF sensor (if equipped)
  • HO2S (9G444) or (9Y460)
  • Fuel injector (9F593)
  • PCM (12A650)

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