Trouble Code Definition
FAULT CODES
| Code | Component | Circuit Fault |
|---|---|---|
| 12 | HEI Reference Signal | KOEO (Normal Condition) |
| 13 | O2 Sensor | Open Circuit |
| 14 | Coolant Temp. Sensor | High Temperature Signal |
| 15 | Coolant Temp. Sensor | Low Temperature Signal |
| 21 | Throttle Position Sensor | Signal Voltage High |
| 22 | Throttle Position Sensor | Signal Voltage Low |
| 24 | Vehicle Speed Sensor | Signal Fault |
| 32 | EGR System | System Failure |
| 33 | MAP Sensor | Signal Voltage High (Low Vacuum) |
| 34 | MAP Sensor | Signal Voltage Low (High Vacuum) |
| 42 | Elec. Spark Timing Circuit | Signal Fault |
| 44 | O2 Sensor Circuit | Lean Exhaust Signal |
| 45 | O2 Sensor Circuit | Rich Exhaust Signal |
| 51 | Faulty MEM-CAL | Circuit Fault |
| 53 | System Voltage | Overvoltage Signal |