just bought this used vehicle, my boyfriend took it for a test drive and the idilling off the car was off. the needle would go up and down while driving. the check engine light was on when we bought it, but my boyfriend said it wasnt a big deal its probably something minor. well now a blue temp. gauge re appeared a few days later,it keeps coming on here and there. whats the deal?
 
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Ask Your Question2001 Volkswagen Beetle
Question: my check engine light is on and now the blue coolent temp gauge came on
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