Trouble Code Definition
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1992 Pontiac Firebird, 1992 Oldsmobile Custom Cruiser, 1992 Chevrolet Caprice, 1992 Chevrolet Camaro, and 1992 Cadillac Brougham. However, it is still accessible from the selected car via links, so may be relevant.
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 | ||
| 21 | TPS Signal Voltage High | ||
| 22 | TPS Signal Voltage Low | ||
| 23 | MAT Sensor Signal Voltage High | ||
| 24 | Vehicle Speed Sensor Circuit | ||
| 25 | MAT Sensor Signal Voltage Low | ||
| 32 | EGR System Error | ||
| 33 | MAP Sensor Signal Voltage High | ||
| 34 | MAP Sensor Signal Voltage Low | ||
| 35 | IAC Idle Speed Error | ||
| 42 | EST Circuit Open Or Grounded | ||
| 43 | ESC Error | ||
| 44 | Lean Exhaust Indication | ||
| 45 | Rich Exhaust Indication | ||
| 51 | Faulty PROM, MEM-CAL Or ECM/PCM | ||
| 52 | Faulty/Missing CAL-PAC Or MEM-CAL | ||
| 53 | Anti-Theft System Fault | ||
| 54 | Fuel Pump Voltage Low | ||
| 55 | ECM/PCM Error | ||
|
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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.