Question about 1999 GMC Denali

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Fuel/gas cap my check engine light is on and every time I get it checked out it reads I ned a new fuel cap at times I do smell gas.

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  • Anonymous Mar 12, 2014

    gas cap replacement 2004 xuv check engine lite 4 times ??

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  • 48 Answers

Have you replaced the gas cap? most of the time when a check engine light is on for the gas cap, its because the cap isnt venting the fumes properly or the cap isnt on tight enough.

Posted on Jul 16, 2008

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Posted on Jan 02, 2017

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2 Answers

Smelled gas and check engine light came on. Periodically have smelled gas over the past 6 months or so. What is cause?


Hi Ed.
this is all i could find at the moment.
Gas Cap Causing Gasoline Smell in Car. I know it may seem obvious, but a loose or missing gas cap can cause a fuel smell in your vehicle. You could even have a faulty gas cap that is leaking fumes. A faulty gas cap can also cause the check engine light to illuminate with a DTC on newer cars.

Gasoline Smell in Car, 5 Common Causes - Simple Car Answers

or go to this link and read up some more.
Smelled gas and check engine light came on Google Search

Nov 04, 2017 | Cars & Trucks

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Dodge ram gas cap light and check engine light on at the same time p0456 and p0457


456 is a small evap leak check hoses to evap canister by fuel tank.

Oct 10, 2014 | Dodge Ram 1500 Cars & Trucks

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Gas smell


I had a similar problem with a 2000 Kia Sportage. The check engine light came on all the time. Part of the problem seemed to be the fuel cap having high pressure. Then one fine day I smelled gas fumes from the rear of the vehicle. After removing the fuel pump cover in the rear behind the seats, I found gas coming from a hose from the tank. I then (sometime later) I found a crack in another hose. The hose was from the filler neck. It caused a lack of vapor pressure and a smell. The check engine light now was off.

Mar 20, 2014 | 2001 Kia Sportage

1 Answer

I have got misfire in many cylinder,i have got code p0302,p0304,p0305,burn alot of fuel, smell gasoline in side,engine start loudly,


I would start with a tune-up: new plugs and wires, new distributor cap/rotor button, new air filter, maybe a new fuel filter. If you get gas at the same location all the time, try a different one for a while too.
These would be the easiest to do first to eliminate some common issues.

Feb 17, 2014 | 2005 Honda Odyssey

1 Answer

Check engine light came on and code said to replace gas cap, did that and two weeks later check engine came on same code, then one day fuel light came on and gauge went to fueull then empty 2 times , now...


You wouldn't think a gas cap would be that important, but it is. When it's loose or cracked, fuel vapors leak out and can throw the whole fuel system off. This causes a reduction in gas mileage and increases emissions.
What causes it: If you get an error pointing to the gas cap it means fuel vapors are leaking out of your cap. This means the cap is either cracked or just wasn't tightened well enough.
What you should do: If your car isn't feeling jerky or strange when the check engine light comes on the first you should check is the gas cap. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. Continue driving and see if the check engine light turns off. Alternately, you can purchase a gas cap for about $3 at an auto parts store. All you need to do is take the old one off and screw on the new one. If you've already made it to the store, you might as well just replace it. While not car-threatening, it's good to take care of this right away to improve gas mileage.

Aug 11, 2017 | 2004 Chrysler Pacifica

1 Answer

Engine light on. 2002 Passat V6. 140k miles. Car runs very well. Auto 4motion. Oil change about a month ago. Smelling faint burning oil just recently. Engine light came on. I was very low on gas at the...


Major auto parts stores have code readers and will read out your codes for free. The engine light indicates that at least one code is waiting to be read.

Feb 08, 2011 | 2002 Volkswagen Passat

2 Answers

CHECK GAS CAP / ENGINE SERVICE ARE ON


Most likely an evap system fault code stored in engine computer. Best bet and cheapest thing is go to the dealer and buy a new cap. Install the cap and drive the car for a few days if the light goes off, your all set, if not you need to check for codes. Then probably find a leak or a faulty evap vent valve or purge valve.

Oct 07, 2010 | 2001 Pontiac Bonneville

3 Answers

Check engine light comes on in a 07 sebring when the gas cap is removed and the engine is started there is no change in the indicator.


this is normal, you should not have engine running when re-fueling, fuel gauge moves very slowly if key is on while fueling, turn key off and then on and should read proper level.

Mar 01, 2010 | Chrysler Sebring Cars & Trucks

1 Answer

Check engine light code 442 reolaced gas cap still coming back on after clearing


Then either it's the wrong fuel cap, or you have a leak else where. I'd look under the back at the fuel tank where the fill hose goes to the tank. The tanks like to break there. Most of the time people smell the gas before the light is set, but it may be differant in your case.

Oct 13, 2009 | 2003 GMC Envoy Xl

3 Answers

Strong gasoline smell when cold and wet weather.


the first thing to do is look under the car at the plastic canister the vaper recovery system it is in the rear some times it is coverd by a sheild the vacuume hoses are bad if you smell gas and that will turn the light on it works off a pressure senser on the tank check all the hoses

Dec 07, 2008 | 2001 Kia Sportage

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