It was working well before I took it to a shop for an analysis of the "service engine soon" light. Could they have caused the problem during their evaluation? Later I took it in again and they said the instrument cluster needed to be rebuilt and they will have it done but the cost will be almost $400---don't have the money!
My temperature gauge is pegged at zero & doesn't move, what is causing problem? on 2000 Buick Park Avenue
I had the same problem with my gas gauge after i had the battery replaced. All i did was get a magnet and hold it close to the needle and turn counter clockwise and it worked perfectly after that.
Very unlikely they could have caused this failure. If have doubts take it to another shop for diagnosis and opinion.
Make the wire didn't come off the sensor under the hood.