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Q: check engine light on, shows replace gas cap !! on 2003 Dodge Grand Caravan

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Check engine light on, says to replace gas cap, did that.. 1300 miles later, check engine light came on again, says to replace gas cap ??? any suggestions ??
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The system has detected a leak in the evaporative system and it wants you to check your gas cap since that is the most common reason for an evaporative system leak. If the cap is ok then more than likely you have a leak that is not contributed to the fuel cap. The computer has no way to physically check the fuel cap, it can only assume the possibility that you may have left it off.
The system has detected a leak in the evaporative system and it wants you to check your gas cap since that is the most common reason for an evaporative system leak. If the cap is ok then more than likely you have a leak that is not contributed to the fuel cap. The computer has no way to physically check the fuel cap, it can only assume the possibility that you may have left it off.
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