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: 101,879 (45,000–199,900)
Engines affected: 2.7L V6, 3.5L V6, 5.7L V8 HEMI
20 people reported this problem
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The temp guage does not reach operating temp. Heater blows cold air. After driving it awhile car overheated.
Check engine light came on and the fan keeps blowing while the thermostat is not reading. Just happened this morning.
check enigine light came on do to bad thermostat