Question about 2005 Buick Rendezvous

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How to re-set fuel cap warning light. - 2005 Buick Rendezvous

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Light should reset itself after a day or so, assuming the cap is now sealing the tank. If not, have autozone or advance put a scanner on to clear it--they have free scan service.

Posted on Sep 13, 2010

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Posted on Jan 02, 2017

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I had blinking vsc code and check engin light on. Took it to a dealer who ran diagnotic. Dealer said gas cap has failed and new charcoal canister is needed. Since the high cost of latter, I simply...


Don't worry about that light, if performance and fuel economy is good. The light is still a fault from the evaporative canister.. It should not affect performance. Just make sure the fuel cap is snug. Just perform The ODBII scan periodically to catch any future problems. The vacume diaphragm for canister purge should be unplugged and the vacume hose plugged. This will avoid engine from sucking fuel into the engine due to a ruptured diaphragm in the canister

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The warning light is telling the driver the gas cap may have been left off when the tank was filled.
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If the gas cap wasn't on properly then the change in pressure would set off a sensor. Put the cap on right or replace it and if the check engine goes away after a few days that was your problem.



You replaced the cap and it will take quite a few driving cycles for the light to go off if that was the culprit. Try disconnecting the negative battery cable for 5 minutes and that might reset the light.


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What is code PO496 and PO455 for a 2007 Pontiac Grand Prix mean


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- Possible a noticeable fuel odor caused by the release of fuel vapors Possible causes - Missing or loose fuel cap
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There are a number of things that casue this fault code, here is some info on what the problem might be.

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- Possible a noticeable fuel odor caused by the release of fuel vapors.
Possible causes - Missing or loose fuel cap (most common)
- Incorrect fuel filler cap used
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- Foreign matter caught in fuel filler cap
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- EVAP system hose leaking
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Gas cap warning light is on. Gas cap is tight.


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