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Flashed the xHP back to stock and I am still getting the error codes.
Fan is running extremely hard and loud when this happens even though the engine oil and coolant temps are below operating temperatures.
Coolant is about 165 to 185 and oil temp is in the 180s as well. The car is not overheating at all even though the error message says the engine is too hot.
So annoying. This has been very reliable other than this issue.
I don't think it is a water pump issue since the cooling system is working fine.
Maybe the coolant temperature sensor is the next thing to try? Easy DIY.
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