Clearing Trouble Codes
WARNING:
Ensure all codes, "Readiness", and/or "Once Per Trip Tests" have been recorded before clearing codes. Information may be erased when code information is cleared. Certain driving pattern tests must be completed to satisfy all I/M inspection criteria. Driving test (drive cycle) information is not available from manufacturer.
Once repairs have been performed, codes must be cleared from ECM memory. Codes may be cleared by following methods:
- Scan tool (follow manufacturer's instructions).
- Remove EFI fuse (15-amp) from engine compartment fuse box, near the battery, for 10 seconds or more to clear memory in ECM.
- Disconnecting negative battery cable (memory for electronic components will be also be canceled).
TROUBLE CODE IDENTIFICATION
| Code | Component/System | Most Likely Cause |
|---|---|---|
| P0100 | Mass Airflow (MAF) Sensor Circuit | Open/Short Circuit |
| P0101 | Mass Airflow (MAF) Sensor Circuit | MAF Sensor Range/Performance Problem |
| P0110 | Intake Air Temp. (IAT) Sensor Circuit | Open/Short Circuit |
| P0115 | Coolant Temperature Sensor (CTS) Circuit | Open/Short Circuit |
| P0116 | Coolant Temperature Sensor (CTS) Circuit | Range/Performance Problem |
| P0120 | Throttle Position Sensor (TPS) | Open/Short Circuit |
| P0121 | Throttle Position Sensor (TPS) | Range/Performance Problem |
| P0125 | Heated Oxygen Sensor | Insufficient Coolant Temp. For Closed Loop Fuel Control |
| P0130 | Heated Oxygen Sensor (Front Sensor) | Sensor Malfunction |
| P0133 | Heated Oxygen Sensor Slow Response | Right Sensor Malfunction |
| P0135 | Heated Oxygen Sensor | Open/Short Circuit |
| P0136 | Heated Oxygen Sensor | Open/Short Circuit |
| P0141 | Heated Oxygen Sensor | Open/Short Circuit |
| P0170 | Fuel Trim Malfunction | Too Lean Or Rich |
| P0300 | Random Misfire Detected | Miscellaneous |
| P0301 | Cylinder No. 1 Misfire Detected | Miscellaneous |
| P0302 | Cylinder No. 2 Misfire Detected | Miscellaneous |
| P0303 | Cylinder No. 3 Misfire Detected | Miscellaneous |
| P0304 | Cylinder No. 4 Misfire Detected | Miscellaneous |
| P0305 | Cylinder No. 5 Misfire Detected | Miscellaneous |
| P0306 | Cylinder No. 6 Misfire Detected | Miscellaneous |
| P0325 | Knock Sensor No. 1 Circuit Malfunction | Open/Short Circuit |
| P0330 | Knock Sensor No. 2 Circuit Malfunction | Open/Short Circuit |
| P0335 | Crankshaft Position (CKP) Sensor Circuit | Open/Short Circuit |
| P0340 | Camshaft Position (CMP) Sensor Circuit | Open/Short Circuit |
| P0401 | Insufficient EGR Flow Detected | EGR Valve |
| P0402 | Excessive EGR Flow Detected | EGR Valve |
| P0420 | Catalyst System Efficiency Below Threshold | Catalytic Convert. |
| P0500 | Vehicle Speed Sensor (VSS) Malfunction | Open/Short Circuit |
| P0505 | Idle Air Control (IAC) System Malfunction | IAC Valve |
| P0510 | Closed Throttle Position Switch Malfunction | Throttle Position Sensor |
| P1300 | Igniter Circuit Malfunction | Igniter IGF Or IGT Open/Short Circuit |
| P1335 | Crankshaft Position (CKP) Sensor Circuit | Open/Short Circuit |
| P1500 | Starter Signal Circuit Malfunction | Starter Signal Circuit Open/Short Circuit |
| P1600 | ECM BATT Malfunction | Back-Up Power Source Open Circuit |
| P1605 | Knock Control CPU Malfunction | ECM |
| P1780 | Park/Neutral Position (PNP) Switch Malfunction | Short Circuit |