Changed thermostat, grand prix gt, check engine light still on?!?
I have a 2000 Pontiac Grand Prix GT, great car, no major problems. Went to get my registeration smog check and failed due to "Coolant temperature below thermostat rating". So I figured start with the cheapest option first, changed the thermostat. No my SERVICE ENGINE SOON light is still on. What else could it be?
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check for a bad relay. i had a 2000 grand am se that was throwing a security light for some reason. i was losing power in the beginning and then one day i was driving and the engine sputtered and died. come to find out it was the fuel pump telar that had gone bad. the secirity light went off after rrplacment. drove great aftrr. there is also you can do with turning the key to acc for like 15 min. idk look it up
Hello, kevans222 and thank you for asking your question on Fixya!
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just about everything, wipers, washers, power windows, power locks, security system to some degree, interior lighting and so on, it does not control the engine, the anti lock brakes and the emssion system..