Ram 3500

Check Engine Light Due to Failed Thermostat on Dodge Ram 3500

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: 88,000 (78,000–98,000)
Engines affected: 5.9L 6 Cylinder Diesel Turbo, 6.7L 6 Cylinder Diesel Turbo
8 model years affected: 2003, 2004, 2005, 2006, more2007, 2008, 2009, 2010
11 people reported this problem
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Dodge Ram 3500 : Check Engine Light Due to Failed Thermostat
I have had this issue with mine as well, I need to take it in to get it fixed.