Edmunds Answers

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  • avatar karjunkie 09/19/08 5:22 pm PST

    First check to make sure your gas cap is on tight as modern evap systems in the fuel system will give warning when the fuel tank is not pressurizing because of a loose gas cap. If the car runs and works without problem, it may simply be that the on board computer is giving false signals. You can have it scanned at your local auto parts store with an OBDII scanner if it is a 1996 or later car or truck.Lastly, make sure your battery terminals are tight and clean as this may be a cause of intermittant electrical variations that will set off the check engine light.

Answers

  • karjunkie 09/19/08 5:22 pm PST

    First check to make sure your gas cap is on tight as modern evap systems in the fuel system will give warning when the fuel tank is not pressurizing because of a loose gas cap. If the car runs and works without problem, it may simply be that the on board computer is giving false signals. You can have it scanned at your local auto parts store with an OBDII scanner if it is a 1996 or later car or truck.Lastly, make sure your battery terminals are tight and clean as this may be a cause of intermittant electrical variations that will set off the check engine light.

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