Check Engine Light Due to Failed Thermostat on Dodge Ram 2500

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.

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Average mileage: 28,000 (28,000–28,000)
Engine affected: 5.9L 6 Cylinder Diesel Turbo
8 model years affected: 2003, 2004, 2005, 2006, more2007, 2008, 2009, 2010
9 people reported this problem
0 people shared problem details
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