Question about 2001 Pontiac Grand Prix

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Check gas cap

2005 grand prix gt check gas cap light was on i changed gas cap with a new STANT and removed evap canister from behind tire and cleaned it, seems to be in full working order. i dont know how to test it but its clean of debris and spring and mecinism are free. then reset computer it stayed off for about 150 miles now back on

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  • Pontiac Master
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You'll need to get the computer scanned for trouble codes.
Chances are there is a small leak in the EVAP system. Could be a valve or hose in addition to the gas cap.

Posted on Feb 28, 2013

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Posted on Jan 02, 2017

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SOURCE: check engine light came on along with check gas cap

Did u have engine codes scanned? If not, have it done, as it may indicate the problem. Let me know. (most parts stores will scan for codes free) .

Posted on Mar 21, 2009

  • 275 Answers

SOURCE: 2004 Pontiac Grand Prix Evaporative Canister

you should be able to fix it look for a can near the fuel tank that has vacuum hoses coming out of it and you should be able to just buy the bad solenoid

Posted on Nov 03, 2008

  • 14092 Answers

SOURCE: evap canister

it has to be replaced.

Posted on Apr 06, 2009

rockitman187
  • 2559 Answers

SOURCE: 1997 Pontiac Grand Prix Evac Canister Pressure to low

Check hoses for cracks and holes at the pictured locations
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Posted on May 26, 2009

  • 128 Answers

SOURCE: Does anyone know how to reset the

Turn the key ahead to run mode, without cranking and push gas pedal to floor and back up 3 times within 5 sec, this should reset the oil change light. as for the tire pressure light there are a couple of procedures, but ensure first that the pressures are all above 28 psi, and are the same. however, without the use of a tpms tool to communicate with the tire monitor sensors it may not reset. did you have any tires changed over, or rotated? if so the use of the tpms tool is much easier to reset the light. Probably better off bringing to a tire or mechanical shop that deals with it regularly. It is actually not that difficult, but the tool will allow you to tell if a sensor is faulty, or has a weak battery, etc.. hope this helps

Posted on Jan 26, 2010

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Have a 2004 Grand Prix GT the check engine light is had It scanned and came up with evap leak replaced gas cap but didn't fix it.Could it be the evap canister


yes it could be a leak at canister but guessing and throwing parts in and hoping you fix it is wasting time and money --when gas cap change did you clear code ---if code was cleared and if it came up with leak there are hose lines from fuel tank to canister --to solenoid --from engine front to back of vehicle -as well as solenoid connections at engine ----not just a canister to check --check all hose lines for damage/ disconnection ---have car rechecked for code and with code number go to OBD-CODES.com they explain in laymans terms what it means and suggestions on how to repair
OBD II Trouble Codes Home

Aug 15, 2015 | Cars & Trucks

1 Answer

Were is a nvld pressure switch


It can be attached to the charcoal canister (by the fuel tank) or up behind the inner fender well of the left rear tire. But before you go replacing an expensive part. you should have it put on a scanner to find the exact problem. You could only need a gas cap. This is an EVAP problem.

Dec 06, 2014 | 2005 Jeep Grand Cherokee

1 Answer

Code 0455 on a 2004 grand prix


P0455 - Evaporative Emission Control (fuel vapor control) System Leak Detected Gross Leak

Possible causes- Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking Tech notes The P0455 it's a very common code, because the code is set if the gas cap is loose or missing. Start by tighten the gas cap and clearing the code. In most cases the code can be clear by disconnecting the car battery for about 30 minutes.

Oct 02, 2012 | 2004 Pontiac Grand Prix

3 Answers

What is code PO496 and PO455 for a 2007 Pontiac Grand Prix mean


P0496 is not alisted code.
P0455 - Evaporative Emission Control System Leak Detected Gross Leak (fuel vapors)
Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Possible a noticeable fuel odor caused by the release of fuel vapors Possible causes - Missing or loose fuel cap
- Incorrect fuel filler cap used
- Fuel filler cap remains open or fails to close
- Foreign matter caught in fuel filler cap
- EVAP canister or fuel tank leaks
- EVAP system hose leaking
- Fuel tank leaking

Jan 24, 2012 | 2007 Pontiac Grand Prix GXP Sedan

1 Answer

1999 Grand Am GT Check engine light is now staying on. This light haas come on many times since the car was new but every time it happened it was because of the gas cap not being vapor locked. Taking it...


If you have the same code, as in EVAP leak, you could have a number of issues. A bad gas cap, rusty filler neck, (Hole in it) bad vent solenoid, bad purge solenoid, bad charcoal canister...and on. Get the system looked at.

Oct 25, 2010 | 1999 Pontiac Grand Am GT

1 Answer

Changed the gas cap,evap canister, and the vent solenoid and light comes back on with same code what else could possibly be wrong?


you need to check the vacuum hoses and fittings going back to the gas tank. you have to make sure there are no cracks in the hoses and make sure all the connectors have good o rings. leave comment

May 07, 2010 | 2000 Pontiac Grand Prix

1 Answer

Moisture in truck, with check gas cap message on dash


The two are of course not related. Check the trunk seal for missing portion, tears, splits, etc. this has to be where the rain is coming in. You can check for leaks with a hose and climb in the trunk with a flashlight, having a trusty helper direct water to one area at a time to check for the leak. The gas cap light is probably on due to a defective evap. vent valve, which is located behind the left rear tire near fill tube for gas tank.

May 12, 2009 | 2005 Pontiac Grand Prix

2 Answers

Codes: PO133 02, P1133 H 025, P1134 H 025


I would try to clean out the egr valve , check for leaks at the evap canister, check the evap canister soleniod , and lastly change out the cat convertor, The cat convertor is most likely under the federal emmission warranty of 8 yrs,.80000 miles. You can take the vehicle in to have checked by local dealer or call gm customer service to check the warranty on the cat. convertor by giving them your vehicle number.

Apr 18, 2009 | 2005 Pontiac Grand Prix

1 Answer

Evap canister


it has to be replaced.

Mar 30, 2009 | 1997 Pontiac Grand Prix

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