2007 Chrysler Aspen Gas Cap Warning Followed by Check Engin

Tiny
LCAMBARD
  • MEMBER
  • 2007 CHRYSLER ASPEN
  • V8
  • AWD
  • AUTOMATIC
  • 62,000 MILES
My 2007 Chrysler Aspen started displaying the GASCAP message over the Odometer -- so completely against my usual habits, I decided to look it up in the Owner's Manual.

I took the gas cap off and re-installed it and hit the Odometer Button and it cleared momentarily. I tried filling the tank up, but same problem.

As the Owner's Manual promised the check engine light came on after a few resets. I purchased a new gas cap, but same problem. I don't know what the code is being generated.

The vehicle is running fine and before I took it back to the dealer, I thought you might have a suggestion.
Wednesday, April 7th, 2010 AT 8:15 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
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It sounds like a leak in the EVAP system. IF the check engine light is on, take it to a nationally recognized parts store and have them scan the computer. Most will do it for free. Once you do that, let me know what you find.

Joe
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Wednesday, April 7th, 2010 AT 5:26 PM
Tiny
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The code came back PO457 Evaporator Emissions Leak -- what do you think?
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Thursday, April 8th, 2010 AT 6:09 PM
Tiny
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I had a feeling that is what it was. Here is what you need to do. Take the vehicle to a shop that can fog the EVAP system. What they will do is pump (fog) into the system at a very low pressure (1 psi). From that, the system will leak the fog out where the problem is.

The reason I recommend doing it this way is because you will spend countless hours looking for a needle in a haystack. These leaks can be anywhere and they are nearly impossible to find without the proper tools.

Also, I want you to review your factory warranty. This is an emissions component and they do come with a longer than normal warranty. I can't remember if the mileage is 50K or 70K on your year vehicle. I do know it is a minimum of 5 years.

Let me know what you find.

Joe
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Thursday, April 8th, 2010 AT 9:53 PM
Tiny
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Joe -

I didn't realize that the FLEX-Fuel option on my 2007 Chrysler Aspen required a special gas cap.

The one I tried from the local parts store obviously was not one of the special ones since they never asked me if it was FLEX-Fuel or not. Perhaps that's the why it didn't work.

So I ordered one through the dealer, to see if that works before I let them to check for a leak as you described.

I'll let you know what I find.

Thanks again,

-luigi
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Monday, April 12th, 2010 AT 9:08 AM
Tiny
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Let me know.
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Monday, April 12th, 2010 AT 12:52 PM

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