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ginger 3/22/2011
2004 Dodge Ram 1500 SLT 8Cyl5.7L - Preventive Maintenance
service engine light comes on no code shown usually after fueling gas cap on tight butit seems real easy to open
2 Answers
  • yboy82
    yboy82 3/22/2011
    When you said no codes shown, you mean you already diagnose your vehicle with a scan tool to verify if there is a stored trouble code?
    yboy82 3/22/2011
    It is possible that your gas cap is faulty.
  • HouseCallAuto
    HouseCallAuto 3/22/2011
    I do not understand why you see no code. When the light is on, if checked same day there will be a fault code there. No code, no fix, just guesswork. Try a new gas cap, cheap part, but I suspect a different cause.

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