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2006 pontiac torrent evap leak?

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Jun 28, 2017, 8:18 PM

Post #1 of 5 (1985 views)
2006 pontiac torrent evap leak? Sign In

Hey guys, my wife's 2006 pontiac torrent 3.4l 130k suv has a p0455 evap system large leak code. Ive tried tightening the gas cap and resetting the code, no luck. I have replaced the vent valve and purge valve in the last year due to similar codes if that matters. The car drives perfect except occasionally it will crank a bunch of times and not start. Then it starts normally a second later. Also I don't smell fuel at all. Any advice would be great, thanks!

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jun 29, 2017, 6:07 AM

Post #2 of 5 (1946 views)
Re: 2006 pontiac torrent evap leak? Sign In

Most of these require a smoke test to find the leak. Just because you already replaced these valves doesn't rule them out from being bad now.

You could also have a broken hose/line above the tank where it is not readily accessible.


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

Veteran / Moderator
Sidom profile image

Jun 29, 2017, 6:44 PM

Post #3 of 5 (1922 views)
Re: 2006 pontiac torrent evap leak? Sign In

Most evap leaks do take a smoker to find......P0455 is a large leak....What you can do is look at all the evap related hoses, under the hood & under the car.......Any that look crack or are soft and spongy should be replaced

Tom Greenleaf
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Jun 29, 2017, 10:11 PM

Post #4 of 5 (1910 views)
Re: 2006 pontiac torrent evap leak? Sign In

To add: If rust involved carefully check metal lines, top of fuel tank if suspect, fuel necks etc.,


Ultimate Carjunky / Moderator
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Jun 30, 2017, 8:08 AM

Post #5 of 5 (1896 views)
Re: 2006 pontiac torrent evap leak? Sign In

Long crank time occur after the vehicle is refueled?

Here is a TSB you might want to check out:


Bulletin No.: 09-06-04-001

Date: January 08, 2009

Malfunction Indicator Lamp (MIL) Check Engine Light On, DTC P0442 or P0455 Set (Perform Outlined Repair)

2005-2008 Chevrolet Equinox
2006-2008 Pontiac Torrent


Some customers may comment on a check engine light on.

Upon further investigation, the technician may find DTC P0442 (EVAP small leak) or P0455 (EVAP large leak) set as current or in history.


This condition may be caused by the rubber grommet at the fuel tank filler neck not being properly seated. In some situations, the inner lip of the grommet may ride over the top of the filler neck, preventing the fuel cap from tightening properly, resulting in poor sealing. This can set the small or large leak diagnostic codes.


DO NOT replace the fuel cap for this condition. Follow the instructions listed below.

1. Inspect the rubber grommet for damage. Replace if necessary.

2. Ensure that the grommet is correctly seated to the fuel filler neck pocket.

3. If the grommet is not correctly seated, use a non-metallic tool to push down on the inner lip of the grommet, folding it inward on the fill pipe. This will prevent the possibility of the inner lip interfering with the fuel cap.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

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