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08-22-2013
1999 Pontiac Grand Prix GT.
I have replaced the, radiator and the cap, the temperature sender and the coolant, Now, the temperature gauge goes all the way to hot when I first start the vehicle and stays there even after I turn the key off. In order to get the gauge to go back down, I have to turn the key on and off several time, it goes down a little each time.
08-22-2013
Sounds like either a wire issue to the ECT sensor or the new sensor is faulty.
08-22-2013
Temp gauge problems happen all the time. Wiring or sensor most likely. Just like Five said
08-23-2013
Try unplugging the ECT and turning the key to on (not start), does the gauge drop to zero?
08-27-2013
ALOT of part store temp sensors read max temperature in our cars for some reason. Do what bill said and unhook it and see if it goes full cold.
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