The thermostat may fail to close completely, causing the Check Engine Light to illuminate. This problem will prevent the engine from reaching normal operating temperature; a new thermostat should be installed.
Average mileage: 72,825 (52,000–114,000)
Engines affected: 3.6L V6, 3.7L V6, 4.0L 6 Cylinder, 5.7L V8 HEMI
16 people reported this problem