Check Gas Cap with P0440 Evap Emission System Code on my - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 05-12-2006, 10:35 AM   #11
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I think you have a couple good points there about the filter and the possibility of damage to the evap line under there, Bill.
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Old 05-12-2006, 10:49 AM   #12
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for teh record, the evap canister is under the vehicle, undeneath the rear passenger compartment
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Old 05-12-2006, 11:09 AM   #13
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Thanks Toasty!

I knew that I should put a disclaimer in there, as the 2000+ are different in a number of ways from the '96-99. Let'* face it, we're all more familiar with the year/years we own...
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Old 05-12-2006, 02:03 PM   #14
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From a PM from Dave...he swapped gas caps with his GTP buddy and the issue still persisted on the Bonneville. In other words the gas cap was informally tested and passed.
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Old 05-12-2006, 02:09 PM   #15
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So Dave,
You gonna check out that fuel filter and the evap/vacuum lines next?
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Old 05-17-2006, 10:07 PM   #16
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Default P0440 Code on my 2001 SSEi

The Dealer claims they checked the fuel filter and did a pressure check on the lines and everything checked fine, but I will check them again myself.
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Old 05-17-2006, 10:21 PM   #17
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Default Re: Check Gas Cap with P0440 Evap Emission System Code on my

Quote:
Originally Posted by DaveSSEi
The Evap System test runs at random so it is extremely expensive to have the dealer troubleshot it.
Yes, the PCM runs the Evap System Test routine at random intervals, however, I believe the routine can be given the command to run with a Tech II scan tool. This way the Evap System can be checked for any vacum leaks.
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Old 05-17-2006, 10:59 PM   #18
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Default P0440 Code on my 2001 SSEi

I think I just solved the problem.
Found a connection on the canister that wasn't snug.
It pushed in about 1/2 inch and clicked.
Reset my codes.
Thanks all.
I intend to visit the dealer and ask them for my money back tomorrow.
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Old 05-18-2006, 02:00 AM   #19
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Great news, Dave. Glad that you found it, and for reporting back on what the solution was. Good luck with the dealer.
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Old 05-18-2006, 08:19 AM   #20
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glad to hear you got it all fixed up, good luck at the dealer
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