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Discussion Starter · #1 ·
I have a 2006 G6 GT Coup with 76,000 miles on it. Recently the "CHECK GAS CAP" comes on. I have check the gas cap, I even replaced the gas cap and this morning it came back on.

I've noticed that after the "CHECK GAS CAP" message appears several time the check engine light also lights up.

Could this be something other than the gas cap?

Could this be a sensor or gas pump problem?

Oh by the was the car is running perfectly.

:confused:
 

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I have a 2006 G6 GT Coup with 76,000 miles on it. Recently the "CHECK GAS CAP" comes on. I have check the gas cap, I even replaced the gas cap and this morning it came back on.

I've noticed that after the "CHECK GAS CAP" message appears several time the check engine light also lights up.

Could this be something other than the gas cap?

Could this be a sensor or gas pump problem?

Oh by the was the car is running perfectly.

:confused:
I'm not sure about the G6 but for most cars you can disconnect the battery for a few minutes then after reconnecting and starting it should clear the gas cap light.
 

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Maybe your fuel tank pressure sensor is on its way out because it's causing the engine light to come on too your computer might be detecting low fuel pressure in the tank, just a thaught from past experiences and mine was also an intermitten thing.
 

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I have 87K miles on mine and it happens to me every once in awhile.

Just recheck the cap and clear it in the DIC (enter).

You may have to do that several times.
 

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Check Gas cap

I've got an 06 G6 GT with almost 120k miles on it. "Check Gas Cap" started a few months ago. I finally bought a new gas cap at Auto Zone and I thought I fixed the problem. My husband started driving it and said he never saw the warning again. But of course, the first time I drive it after the new gas cap, it dings and shows "Check Gas Cap" again... and... drum roll... Then I got the dreaded check engine light! Checked the code on that at home and it was PO455.
I took it in. It's been at AAMCO since Monday. They said it was throwing 4 codes. They are charging me $400 to run diagnostics on all four codes. It's now Friday and I still don't know what is wrong with it. I think my AAMCO is under new management and they are probably screwing me. The only reason I took it there is because I had a similar issue with a different automobile about two months ago, and they had awesome service and went out of their way to help me and to not screw me. So, I am probably very, very screwed right now.
I have done every scheduled maintenance on this car (and then some). Besides putting four or five sets of rotors and 6-8 sets of brakes on this thing, and constantly having to get it aligned and balanced, I really haven't had any "system" trouble with it. It got new spark plugs and lots of new goodies, and it recently passed its smog check.
So... This sucks, and it's quite surprising, since it got a clean bill of health on it only a few months ago.
Anyway, I'll let you all know what they find.
 
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