Trouble Code Definition
ECM/PCM TROUBLE CODE DEFINITION
| Code No. | Circuit Affected | ||
|---|---|---|---|
| 12 (1) | No RPM Reference Pulse | ||
| 13 | Open Oxygen (O2) Sensor Circuit | ||
| 14 | CTS Signal Voltage Low | ||
| 15 | CTS Signal Voltage High | ||
| 16 | System Voltage High/Low | ||
| 21 | TPS Signal Voltage High | ||
| 22 | TPS Signal Voltage Low | ||
| 24 | Vehicle Speed Sensor Circuit | ||
| 26 | Quad-Driver Error | ||
| 27, 28 & 29 | Gear Switch Problem | ||
| 31 | Park/Neutral Switch | ||
| 34 | MAF Sensor Signal Voltage Low | ||
| 35 | IAC Idle Speed Error | ||
| 38 | Brake Switch | ||
| 39 | TCC | ||
| 42 | EST Circuit Open Or Grounded | ||
| 43 | ESC Error | ||
| 44 | Lean Exhaust Indication | ||
| 45 | Rich Exhaust Indication | ||
| 46 | Power Steering Pressure Switch ("A" Body) | ||
| 48 | Misfire Diagnosis | ||
| 51 | Faulty PROM, MEM-CAL Or ECM/PCM | ||
| 52 | Faulty/Missing CAL-PAC Or MEM-CAL | ||
| 55 | ECM/PCM Error | ||
| 66 | A/C Pressure Sensor Circuit | ||
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NOTE:
Use trouble code charts only if SERVICE ENGINE SOON light is illuminated (indicating a current problem exists). Exceptions are Code 13, 15, 24, 44 and 45 charts, which may be used to help diagnose intermittent codes. Anytime control module-related Codes 51, 52 or 55 are displayed with another code, start with 50-series code, and then proceed to lower numbered codes.