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Reset service engine soon light recently not gas cap screwed tight

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Mine does the same thing - I have to screw it past three full clicks to avoid a vapor leak. My mechanic says I could replace it but eventually a new cap will do it as well. Just be sure it is fully "clicked" BEFORE you turn the light off.

Posted on Oct 22, 2013

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Posted on Jan 02, 2017

  • 491 Answers

SOURCE: "Service engine soon" light

take car to any local parts store and have them check for codes. or a auto repair shop or the dealer. i would take to local parts store cause they will do it for free and give you the codes and tell you what they mean

Posted on Oct 18, 2008

  • 139 Answers

SOURCE: 2003 Cadillac Deville a check gas cap error appears with svc engi

put a new gas cap, those system are pres. even if
the cap look ok it maby leaking replace with a new
one it should solve your prob.
eng.ligh come on because of the gas cap

Posted on Apr 09, 2009

  • 116 Answers

SOURCE: Check engine light/gas cap will not stay tight.

yes the gas cap could cause this,also check evap. purge solenoid and hoses for cracks or kinks,the solenoid is on the inner fender and has 2 hoses, one to the intake and one to the canister, the most common cause of this code is a defective purge solenoid.

Posted on Apr 24, 2009

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Hi Gene:
I'd suggest trying to start from the beginning with this.
Try disconnectinf the battery and charging it fully.
When you re-connect it, the "service engine light" may not be on . that would be nice. If there is a problem the light will come back on. Make sure the gas cap is screwed on tight.
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