On my SRT-4 today the error code P0128 (THERMOSTAT RATIONALITY) came on. What does this mean?
A little background, I usually start the car up and drive. I do not usually let the car idle first before driving because I have heard this is worse but to drive at slower speeds. I do not recall gunning it at all before the light came on , however it is cold out today 34 F.
I know the only way to reset the code is to disconnect the battery, or it may turn off by itself after a few drives. Can anyone provide me with more info.