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This morning Temperatures were upper 30's, i park in the garage though. Got about 5 miles from my house and the CIL came on. checked code and is throwing p0128. Coolant looks good, and right level, temperature did not get hot.
I have no idea since i just bought the car 3 weeks ago what thermostat it has in it, if it has a cooler thermostat would it cause this in cold weather.
 

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I would say you have a 180 stat and maybe a tune that is turning on the fans sooner? My 10 SRT does the same thing. I have a tune and 180 stat. Could also be stuck open stat or fans running too much. The code comes on when engine does not heat up fast enough. Start with the stat.
 
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