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What would cause coolant temperature gauge to stop working?

What would cause coolant temperature gauge to stop working? temperature coolant gauge was working fine, then just started working sometimes. now it's not working at all!when i have driven for a while i notice erratic shifting in the gears & some loss of power. i am having troyuble trying to figure out the the cause behind it. please help!!

Asked by: Guest | Views: 166
Total answers/comments: 3
mcgyver89 [Entry]

to verify if the sensor is what's causing the problem, disconnect the connecter from the coolant temp sensor, and jump a paper clip across the terminals. turn the vehicle on after doing this, and see if the gauge has moved in the dash at all. try the same thing with the connecter disconnected. if the gauge moves at all, then it is the sensor itself that has failed.
mcgyver89 [Entry]

On the Audi the sensor is your problem
mcgyver89 [Entry]

ECT (engine coolant temp sensor)