Question about 2006 Pontiac G6

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Pontiac g6 trouble code

Error message says Check Gas Cap

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I hope you didn't overfill your tank.. raw fuel into the vent valve in the filler neck will generally screw it up.. this causes no pressure to build in the tank and it assumes that it because of a gas cap leak... this is one possible reason

Posted on May 23, 2014


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Posted on Jan 02, 2017

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SOURCE: power steering cap location Pontiac G6 3.5L

it is located on the passengerside under the altenator closest to the firewall. make sure the vehicle is turned off reach in under the altenator and you should feel the cap.

Posted on Sep 15, 2008

  • 7 Answers

SOURCE: on a G6, check engine light is on as a result of

Need to replace gas CAp pressure leak

Posted on Nov 19, 2009

Testimonial: "solved my problem"

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SOURCE: Pontiac G6 2006 check gas cap on info menu.

buy a new gas cap or get it diagnosed. Check the seal for cracks and check the filler neck the seal touches for cracks

Posted on May 11, 2010

Testimonial: "going to go get gas cap checked out thank you"

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SOURCE: 2005 Pontiac G6, Check Gas Cap alert on console.

This sensor will also set when there is a leak in the evap system. Check the hoses under the car as they go into the fuel tank. One of them is for the evaporation system. It goes to the evaporation cannister. If that hose is leaking, or if the purge valve is stuck open, you can also get the message you are getting. Your evap cannister and purge valve should be right by the fuel tank, but you'll need to also trace the hose from the cannister to the engine to make sure that hose isn't leaking. If you have any questions, please let me know.

Posted on Oct 18, 2010

  • 547 Answers

SOURCE: I too have a Pontiac

You'll want to go over your warranty information as emission systems have different warranties than the rest of the car. It might be possible to have the cat replaced for free if it still qualifies under the EPA warranty.

Anyway, you probably blew the exhaust gasket before the cat in question as there is too much back pressure in there since the cat is likely clogged.

Posted on Feb 25, 2011

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1 Answer

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Gas cap probably need to be replaced, their inexpensive. The gas cap controls the amount of air entering the gas tank, and only a certain amount of air is susposed to be let in while the car is running. If theres not enough air, or too much air coming through the cap into the tank, the computer will sense this, thus giving you this message

Apr 18, 2014 | 2006 Pontiac G6

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My gas cap was not tight and the check engine light came on what is wrong

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Trouble code p0449

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Apr 22, 2013 | 2006 Pontiac G6

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Hi have a pontiac G6 GT 2005 I have a message that comes on saying check gas cap the 1st time it happened it was under warranty and the dealership replaced the gas cap for me, a year later the same thing...

The fuel cap needs to be tight or it will set a code. It's a pressurized fuel system. Try to tighten snug the code should clear itself. If this does'nt work exchage the fuel cap, it may not be working properly.

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1 Answer

I have an error code of P0446 when i ran a diagnostic on my 2006 G6. My car smells like gas but we looked it over and there are no obvious leaks or wet spots. Is it an O2 sensor or possibly a gas cap?

P0446 is Evaporative Emission vent system performance.

the smell you have is likely a tube/pipe loose at the evap canister (adjacent to fuel tank)

The two issues seem linked

Nov 23, 2010 | 2006 Pontiac G6

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