Question about 2006 Dodge Durango

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Everytime I start my 2006 durango the check engine light is on and the mileage changes to the work "gascap"> I have had the fuel filter and fuel lines changed and a sensor. It is still not right... what else could be the problem?

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  • dale blankenship Sep 05, 2010

    This indicates a leak in the fuel system somewhere, could be a bad gasket on the gascap, or a damaged seating surface on the filler neck, or a small hole in the filler neck (maybe due to rust, do they salt the roads in your area?) Try replacing the gas cap, if you can't see any damage to the filler neck. Could also be one of the rubber hoses that connect the filler neck to the gas tank or the fender, or a loose clamp. Ever had a collision? (this could damage the vapor recovery canister or tubing connecting to it.)

  • Amy Sep 06, 2010

    I purchased it new and I have not had a collison with the truck. I replaced the gas cap with a regular cap and even a locking cap. I live in Maryland and they do salt the roads here. I was told when they dropped the gas tank to change the filter and fuel lines, they did not see any visable damage in any of the parts. For an 8 cyl the mileage is pretty low already, but it has been really bad since this started. The first time it went back to the shop, they cleared the engine light and replaced the sensor but it still said gascap. It was fine for a few days, until driving down the road the check engine light made the chime noise and came on and stayed on along with the gas cap words. I took it back to the shop that evening and they had it for a few days, and this is when they replaced the hoses and the gas cap. They said they inspected the tank again and did not find anything to cause alarm or anything that looks abnormal. The check engine light was cleared but still said the words gas cap. He told me to take it and drive it for a few days to see if the computer resets itself, so that is what I did. It started all over again. I am currently driving with the light on until I can get it back. Oh, and my mechanic is certified, so I am not sure what else to do.

  • Amy Sep 06, 2010

    Thanks... we have tried the new gas cap, new fuel lines, and a new sensor.... what else is there that i should be looking for?

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You may have to ask your local Dodge dealer, they should have a machine that can pressurize the fuel tank and vapor recovery system with a harmless but visible smoke, to be able to see where the leak is. This *might* be covered under the 5 year 50000 mile emission component warranty required by the EPA. Show them what has already been done, so they don't duplicate work.

Normally the fuel tank is sealed, vented only through a charcoal canister to capture gasoline fumes that evaporate while the car is parked. When you start the car, the canister is purged into the intake manifold to burn those captured fumes. Somewhere in this system, you have a leak. Usually it is at the gascap, either loose after refilling, or a bad gasket. But it could be anywhere in the fuel and vent system.

Posted on Sep 08, 2010

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  • Dodge Master
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Look at the cap itself as well as the evaporative emission components. The fuel vapor recovery system is open, somewhere.

Posted on Sep 06, 2010

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