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Check engine lights can be something simple (gas cap too loose) or something more serious (bad oxygen sensor). If the light has been on, then there is 'diagnostic trouble code' (DTC) stored in the car's computer. In the US, Autozone auto parts stores will perform a code-read of DTCs at no charge. This can save the expense of paying a service shop to diagnose a loose gas cap. The dealer who sold you the vehicle should do this for free...this is simply plugging a test box into your car...takes about a minute. Many cars (BMW, Honda, others) have the ability to clear their own codes (after X number of restarts). In most models, disconecting the battery for a minute or two will clear trouble codes, thereby getting rid of a nuisance code like a loose gas cap.

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โˆ™ 2006-05-16 19:52:39
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Q: Why would check engine light come on less than 6 weeks after purchase of this certified vehicle?
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