Pinpoint Test H: Fuel Control
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 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)