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2000-2005 Discuss your 2000-2005 Bonneville SE, SLE, and SSEi Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 12-30-2005, 04:41 AM   #11
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Quote:
Originally Posted by mike_peperni
or you can unplug your battery for 10 minutes. (if you cant find an autozone)

The code will not go away by itself, in some case the PCM will do several test in optimal conditions before remove the code.
nope that DOESNT WORK on OBD 2
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Old 12-31-2005, 12:09 PM   #12
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The code will clear itself after about 10 startups with the problems fixed. The alternative is to clear the code. Provided you did not get a bad cap as new and you have no other breaches in the EVAP system it should be fixed.
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Old 12-31-2005, 04:05 PM   #13
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our 2000 SSEi has this same exact problem. WE took it to 2 dealers previously to get it fixed and they couldn't seem to fix it.. It'* going into the third dealer Monday. We had the gas cap replaced three times and the accompaning seals as well.. No fix yet. I'll update after Monday.
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Old 12-31-2005, 04:22 PM   #14
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Quote:
Originally Posted by Rogue
The code will clear itself after about 10 startups with the problems fixed. The alternative is to clear the code. Provided you did not get a bad cap as new and you have no other breaches in the EVAP system it should be fixed.
"about" isnt the sure thing?
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Old 12-31-2005, 04:51 PM   #15
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Quote:
Originally Posted by GAMEOVER
Quote:
Originally Posted by Rogue
The code will clear itself after about 10 startups with the problems fixed. The alternative is to clear the code. Provided you did not get a bad cap as new and you have no other breaches in the EVAP system it should be fixed.
"about" isnt the sure thing?
I don't the number of cycle checks off the top of my head and I'm not at home to look it up. The pressure check is done on an interval (not necessarily every time you start the car) and if the problem is fixed then after so many good checks it turns off. 10 may not be the right amount of times but you get the idea.
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Old 01-01-2006, 11:52 PM   #16
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I've had this problem occur EVERY time I forget and added a few more squirts after the gas pump shuts the gas flow off. For some reason if I do not add more gas after the auto shutoff I never get the warning.

I did purchase a new cap this summer and I was surprised as crap that I could then "overfill" my tank a little at each refill with no Check Gas Cap warning. But on the first cold day of Winter when I overfilled the tank the dang warning appeared again. It took about 3 days and maybe 25 starts til the warning cleared (of course you can just push the reset button and the warning will clear until the next start!).

Now I know I'll just have to live with replacing the gas cap after the first pump auto shutoff. No big deal really.
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Old 01-01-2006, 11:55 PM   #17
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Sorry. My last sentence about "replacing the gas cap" should have read, "screwing the gas cap back on after the auto shut-off occurs the first time". I don't want to mislead someone into thinking I replace my gas cap with each refill.
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Old 01-03-2006, 11:12 PM   #18
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just a little update. We got the car back from the dealer today and got the problem fixed. It ended up being a pressure sensor in the Evap Canister. (it is part of the fuel system.) There are apparently several causes of the "check gas cap" message. Either:
1. a real leak in the fuel system causing a loss of pressure in the fuel tank.
2. A bad pressure sensor (there are five of them according to the dealer. IF any one of them goes bad, the "check gas cap" message will be displayed.
3. The gas cap is loose causing a pressure loss. Because the gas cap is something that anyone can check, that is why the DIC displays the gas cap message. When the car realizes the pressure is not re-gained, the Service Engine Soon light is illuminated so that you take the car in to the dealer to have it fixed.. this problem will NEVER leave you stranded. It'* an inconvenience more than anything.
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