Possible Causes
| Possible Causes |
|---|
| LOW COOLANT LEVEL |
| THERMOSTAT |
| COOLING SYSTEM RESTRICTION OR POOR FLOW |
| HIGH RESISTANCE IN THE ECT 1 SENSOR SIGNAL CIRCUIT |
| HIGH RESISTANCE IN THE SENSOR GROUND CIRCUIT |
| ENGINE COOLANT TEMPERATURE SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .