Gas cap message

[Puddle Jumper 2.0]

I am getting a message on my dash that says gas cap loose and I know it’s indicating a vacuum discrepancy thanks to the fabulous environmental protection agency in there. Hyper responsibility to worrying about stuff. We actually pump out of the ground and as part of the ecosystem in the first place, but I digress I’ve replaced the gas cap as well as some of my emissions components in the engine compartment. I’ve checked all the hoses by removing them and flexing them repeatedly in multiple directions to look for cracks, and none of the nipples appear to be broken and I’ve replaced the gas cap itself with a Factory gas cap and I’m still getting the same indication I’m beginning to think that the gas tank filler assembly between where you stick the gas pump nozzle in and the gas tank may need replacing and I’m wondering if anybody has had any experience with troubleshooting this part of the system or if you have any other suggestions on where to look for the problem. Thank you to all who reply!!!

 

[profdlp]

Have a look at the evap canister. I had the same issue and that fixed it for me. Like you, I started by checking hoses, replacing the gas cap, etc. Then I had that checked and there it was.

 

[Puddle Jumper 2.0]

Thanks!! Did you have to replace yours or was it a J-B Weld fix??

 

[profdlp]

Mine was replaced. It was not horribly expensive, as I recall.

(And I have a good memory for repair bills that make me wince.)

 

[Puddle Jumper 2.0]

Well, I pulled the canister, checked it for damage, replaced the switch assembly and gasket with a MOPAR part, reset all codes with my scan tool (all 5 of them-all evaporator or GASCAP codes) and the damn “GASCAP” light came on as soon as I started it up….. God Bless the EPA. Do they know we pump oil out of the ground??? It’s not shipped in from Saturn or trans-warped in from another dimension; it’s part of Earths’ ecosystem!!! Yes we should be clean and careful but OMG this is stupid!!! The hoses seemed to be in good condition and fit tightly into place on both the switch and canister connection points. My next step will to put it back up on blocks and remove my rear splash shield and closely inspect the filler tube assembly for the gas tank unless anyone has a better idea. Also, the purge control solenoid up by the battery is a new MOPAR part and no damage to vac lines up there either….. thanks again to all who respond or simply feel my pain!!!

 

[Puddle Jumper 2.0]

Also, I am going to replace the fuel pump assembly and will be dropping my gas tank as a part of this evap BS and would like a definitive answer as to whether or not I have a fuel filter in line anywhere. I use moparpartsgiant.com for part number research and parts as well and I have tried every iteration of the term "Fuel filter" I can come up with and so far no dice! is there a filter built into the pump assembly? also what the heck it the "thing" mounted to the front center of the fuel tank just above the rear diff? its held in place by a steel bracket and 2 10mm nuts. Should I consider replacing it while I have the tank down??
Any other suggestions while the tank is out???