Check Engine Light Due to Failed Thermostat on Dodge Magnum

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 101,879 (45,000–199,900)
Engines affected: 2.7L V6, 3.5L V6, 5.7L V8 HEMI
4 model years affected: 2005, 2006, 2007, 2008
21 people reported this problem
Viewing 1 - 3 of 3 comments
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.