I agree, mutiple simultaneous sensor failure is not likely. It sounds like this could be a harness problem but then again, you should still probably investigate each system individually just to be safe. If you can plug a scanner into the OBDII harness and see what the computer really sees as a coolant temp, that will tell you if the gauge is malfunctioning ot if your engine is really having issues.
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Originally Posted by staneee
I don't think its the sensor as also the MPG gauge doesn't work properly either.
It only gets as low as 20MOG when flooring it and sits of the scale when normal driving... Not what it used to do.
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