Possible Causes
| Possible Causes |
|---|
| 5-VOLT SUPPLY CIRCUIT OPEN OR SHORTED |
| UNDERCHARGED BATTERY |
| SYSTEM DTCS PRESENT |
| POWERTRAIN POWER AND GROUND CIRCUIT(S) OPEN OR HIGH RESISTANCE |
| POWERTRAIN FUSES OPEN |
| FUEL DELIVERY SYSTEM |
| FUEL CONTAMINATION |
| INADEQUATE SPARK |
| ENGINE MECHANICAL PROBLEM |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to the appropriate Diagnosis & Testing article in Engine Performance .