Check Engine Light Due to Failed Thermostat on Dodge Charger

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: 100,036 (41,000–170,000)
Engines affected: 2.7L V6, 3.5L V6, 5.7L V8 HEMI
7 model years affected: 2006, 2007, 2008, 2009, more2010, 2011, 2012
76 people reported this problem
Viewing 1 - 20 of 21 comments
Check engine light came on, I took it to get checked out and he said that my thermostat is stuck open. Can I still drive it or not until I get it fixed
I recently had my thermostat housing repaired late last year. Could this be the problem with the check engine light coming on? The engine idles rough and is substantially rocking the car more than normal. Low power and seems the car is about to die, but never does.
will not get warm while in park or in stop and go traffic but if i get on the highway heat will come on and work til i stop
I have anti-freeze residue around thermostat housing and my engine light comes on. The car goes through its info check and the engine light remains illuminated.
I have the exact same issue. My thermostat only reaches a quarter of the way during high way driving and semi-normal during stop and go traffic.
Check engine light came had code read. They state its P0128 thermostat staying open... read several reports of this on Mopar site, surprised there is no recall!!!
The thermostat does not move to half and it takes a while to get warm
heat work fine till i would stop at light then would run could also took longer in the morning to heat up 2day later check enginer light cam on (check under hood low anti freez and thermostat
Check engine light came on and said I need a thermostat
There's coolant around thermostat box low coolant even after I put coolant in check engine light coming on but goes off car take long time to warm up
Same problem, check engine light because of the thermostat no closing properly,
driving lose of heat guage drops off to cold and the check engine comes on
Check engine light came on. Code 2181. Coolant is fine and no weird noises from car.
thermostat stuck open under a 100,000 miles
Thermostat is staying open. Code
Check light is on
Code replaced new thermostat
Running hot need thermostat
The thermostat was replaced but the temperature still does not go high enough. I believe the thermostat is not closing properly.
My car wouldn't get warm, then random days the heat would finally rise. The check engine light came on, and I was quoted for fixing the thermostat and the coolant bleeder valve was leaking.