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Jim
Grant has been working in the automotive industry for over twenty
years. In addition, Jim is an ASE Master Technician with advanced
L/1 certification. He works as manager and technician in his
family's automotive business in New Hampshire. He writes weekly
automotive consumer columns and is editor of an automotive newsletter
that is circulated throughout North America. |
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 Jim Grant's Tech Tips '97 Pontiac Grand Prix GTP, Check Engine Light, But Runs Great
Q: The Check Engine Soon light keeps coming on my ’97 Pontiac Grand Prix GTP, but the car runs great. The local dealer said to tighten the gas cap. I purchased a new gas cap but the light stays on. I would appreciate any information you can give me. - Cheryl B. A: Whenever a customer calls with a check engine light on but says the engine is running good, I allows suggest checking the gas cap. ’96 and new vehicles can/will turn the check engine light on for a loose gas cap. After the gas cap has been tightened, the vehicle has to be driven a few days before the computer is satisfied and will turn the light off. If the check engine light doesn’t go off after a few days, then you should have a computer check performed. There are over a hundred reasons/problems that can cause a check engine light to turn on, even if the engine is running good. The only way to know is to ask the question of the computer.
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