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Check engine light on, shows replace gas cap !!

(2003 Dodge Grand Caravan)
in Peyton, CO on June 18, 2011
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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Popular Answer
on June 18, 2011
Tighten gas cap until you hear couple "clicks".
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.
on June 20, 2011
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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