| 00281 (1231) | Vehicle Speed Sensor | Open Circuit (No Signal From Speedometer) |
| 00513 (2111) | Engine Speed Sensor | Open Circuit Or Loose Or Faulty Sensor |
| 00515 (2113) | Hall Effect Sensor | Open/Short Circuit To Ground Or Battery Voltage |
| 00518 (2212) | Throttle Valve Potentiometer | Open/Short Circuit To Ground Or Battery Voltage |
| 00522 (2312) | Engine Coolant Temp. Sensor | Open/Short Circuit To Ground Or Battery Voltage |
| 00524 (2142) | Knock Sensor I | Open Circuit Or Short Circuit To Battery Voltage |
| 00525 (2342) | Oxygen Sensor | Open/Short Circuit To Ground Or Battery Voltage |
| 00527 (2412) | Intake Air Temp. Sensor | Open/Short Circuit To Ground Or Battery Voltage |
| 00532 (2234) | Supply Voltage | Battery Voltage Less Than 10.0Volts Or More Than 16.0 Volts |
| 00533 (2231) | Idle (IAC Valve) Regulation | Intake System Leaks Or IAC Valve Stuck Or Dirty |
| 00535 (2141) | Knock Sensor (Primary) | Defective Knock Sensor In ECM (Replace ECM) |
| 00537 (2341) | Oxygen Sensor Regulation | (3) Control Limit Exceeded Or Not Reached |
| 00540 (2144) | Knock Sensor II | Open/Short Circuit (No Signal to ECM) |
| 00543 (2214) | Maximum RPM Exceeded | RPM Signal Interference; Engine RPM Exceeded Cut-Off Point |
| 00545 (2314) | Engine/Trans. Signal | Short Circuit To Ground |
| 00549 (2243) | Fuel Consumption Signal | Short Circuit To Battery Voltage |
| 00553 (2324) | Mass Airflow Sensor | Short Circuit To Ground Or Battery Voltage |
| 00561 (2413) | Fuel Mixture Adaptation | (4) Control Limit Exceeded Or Not Reached |
| 00585 (2411) | EGR Temperature Sensor | Short Circuit To Ground Or Faulty Sensor |
| 00586 (----) | EGR Control | EGR Valve Sticking Open |
| 00609 (----) | Ignition Input | Short Circuit To Battery Voltage |
| 00624 (----) | A/C Compressor Signal | A/C System Malfunction Or Faulty Wiring |
| 00640 (3434) | Oxygen Sensor Relay | Open/Short Circuit To Ground Or Battery Voltage |
| 01025 (----) | Malfunction Indicator Light | Open/Short Circuit To Ground Or Battery Voltage |
| 01242 (4332) | ECM Output Stage | Faulty Circuit To Output Check Controlled Components |
| 01247 (4343) | EVAP Frequency Solenoid | Open/Short Circuit To Ground Or Battery Voltage |
| 01249 (4411) | Injector No. 1 | Open/Short Circuit To Ground Or Battery Voltage |
| 01250 (4412) | Injector No. 2 | Open/Short Circuit To Ground Or Battery Voltage |
| 01251 (4413) | Injector No. 3 | Open/Short Circuit To Ground Or Battery Voltage |
| 01252 (4414) | Injector No. 4 | Open/Short Circuit To Ground Or Battery Voltage |
| 01253 (4415) | Injector No. 5 | Open/Short Circuit To Ground Or Battery Voltage |
| 01254 (4422) | Injector No. 6 | Open/Short Circuit To Ground Or Battery Voltage |
| 01257 (4431) | Idle Air Control (IAC) Valve | Open/Short Circuit To Ground Or Battery Voltage |
| 01259 (4433) | Fuel Pump Relay | Open Circuit Or Short Circuit To Battery Voltage |
| 01265 (4312) | EGR Frequency (Two-Way) Valve | Open/Short Circuit To Ground Or Battery Voltage |
| 65535 (1111) | ECM | Replace Faulty ECM |
| (1) For testing information, see J - PIN VOLTAGE CHARTS article. (2) Blink code is 4-digit malfunction indicator (CHECK ENGINE) light code. (3) Check intake and exhaust systems for leaks. Check for too low or too high a fuel pressure. Also check for malfunctioning fuel injectors or engine misfire. (4) Check intake and exhaust systems for leaks. Check for mass airflow sensor hot wire not burning off cleanly. Check for faulty oxygen sensor control and for EVAP frequency solenoid sticking open. Also check for malfunctioning fuel injectors or engine misfire. |
