Possible Causes
| Possible Causes |
|---|
| COOLING SYSTEM ISSUES |
| AMBIENT AIR TEMPERATURE (AAT) SENSOR |
| ENGINE COOLANT TEMPERATURE (ECT) SENSOR |
| AFTERMARKET BLOCK HEATER ADDED TO THE VEHICLE |
| POWERTRAIN CONTROL MODULE (PCM) SOFTWARE |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .