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Gascap message? can anyone help?

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16K views 19 replies 14 participants last post by  bighemi04  
#1 ·
Says Gascap where the mileage is. I made sure it was on securely and the door closed but it wont go off. Im new to this truck and would like to know what is causing it. Appreciate any help!
 
#4 ·
You may have a faulty gas cap. Even if it's tight and looks good, doesn't mean it is. There are also some leaks that can simulate a loose gas cap....thereby giving the same code, so trying a different gas cap to rule that out is good starting point. :smileup:
 
#7 ·
And let us know what the results are. :)
 
#12 ·
Check the hose connection(s) (small hose) at the top of the filler neck. This is the vent line, and can cause the same error code. :)
 
#14 ·
Anyone figure out this problem? I am having the same trouble. Replaced cap still happening even tried plastic sheet under cap but it tripped the code again. I have been reading that it may be the ECIM switch. I don't want to pay dealer prices for a diagnosis, has anyone heard of the switch going bad on the canister?
 
#15 ·
Just a point, emissions warranty goes much further than the 3yr/80000km mark. I cannot recall how far, but it might be worth a call to the dealer instead of beating your head against the wall. Probably need a pressure smoke test to see where the leak is.
 
#16 ·
I have the same issue on my 03 jeep liberty with the 3.7L. I SWEAR to god the light would go out everytime I took it to the dealer. Pulling the battery cable makes it go away for a while. Replaced the gas cap, came right back on. we have been driving it for 90,000 miles with the light on. Runs like a champ so I said to heck with it. It's about the only light bulb Chrysler makes that refuses to burn out!
 
#17 ·
some things that cause this light to lite up
gas cap seal
vent hose has a small tear
hose that goes to the charcoal canister bad
also there is a switch under the cab, just about where your heel rests, maybe it is dirty or the wires may be loose
sometimes the charcoal canister messes up, i believe it is usually up by the headlight, i don't know which side though