Loose Fuel Filler Cap Message
After fuel is added, the vehicle diagnostic system can
determine if the fuel filler cap is possibly loose, improperly
installed, or damaged. Aloose fuel filler cap message
will be displayed in the instrument cluster. Tighten the
gas cap until a clicking sound is heard. This is an
indication that the gas cap is properly tightened. Press
the odometer reset button to turn the message off. If the
problem persists, the message will appear the next time
the vehicle is started. This might indicate a damaged cap.
If the problem is detected twice in a row, the system will
turn on the Malfunction Indicator Light (MIL). Resolving
the problem will turn the MIL light off.
__________________ 4" Superlift, 35" Nitto Tera Grapplers, 18" Moto Metal wheel's, front XHD Rugged Ridge bumper, 10000 lb SuperWinch, rear XHD Rugged Ridge bumper with tire carrier, ACE rock rails.
I have a low mileage 2008 JKU (16K and purch 12/08). It's a daily driver.
I just had the message & subsequent indicator light last week. It came on a day after I filled up. I pulled the cap and re-installed it. Light didn't clear. So I tried the ignition switch "on-off thing" 3 times and the message and indicator light cleared. Don't know if it was a coincidence or not; but I'm just glad it's gone. An orange icon lit up on the dash is annoying and unsettling.
As a side note; After clearing the message/light, I now have to re-program my Auto Door locks to "Unlock All" when I switch the ignition off.
I hate to be a buzzkill and hope this is not your situation, but I have had this problem since 2008 on my 2007 JK. The dealer admitted they could not figure it out. Originally i bought a new cap, then a more expensive locking one. Neither worked. The dealer said they went through the system with some vapor lock analyzer (sorry do not know the name it is really called) that would show where the problem was. They could not find it. They could not explain why it occurs. They said it was all correct. Basically i have a coder reader and periodically reset the code.
Actually I think it is a problem with the screwed up JK wiring that occasionally goes goofing, like the kill plug that you have to occasionally remove and replace to get the jeep to start. Dealer could not explain this either.
Have a 2012 2dr---put on a Jeep gas cap cover just after purchased new and then a locking gas cap soon after that [both added w/less than 500mi]. About four weeks ago [~2600mi on odo], filled up with gas, when home, parked in garage for about a week. Next time I drove it, 'gascap' over odometer. Took my locking cap off, put OEM on, 'error' persisted. About two weeks later, no more gascap error. Placed locking cap back on...no errors since [for the past two weeks].
When I got my GASCAP dash light it had nothing to do with the gas cap but rather the EVAP canister. I have heard of some getting it because evap line was leaking but mine was because the electrical cord that plugs into the side of the EVAP canister came loose. Plugged it in and the error went away
__________________ 2010 Dark Charcoal Pearl Jeep Wrangler Sport S Automatic
4.88 Yukon w/Trac-Lok rear and Eaton ELocker Front - Synergy Gussets - B&M 70264 Trans Cooler
BDS 3" lift - BDS Fox 2.0 Racing Shocks
XHD front Bumper - Trektop NX - Goodyear MT/R w/Kevlar 35X12.5X15 on MB Chaos 5 Wheels - Thrush Turbo Muffler
Hmmm I have the opposite issue, I have left my gas cap completely off 3 times now and driven anywhere from a few miles to 80 miles before I noticed it but I never had a "gascap" message displayed or MIL but according to the manual I should !
I pulled off the O-ring from the gas cap, cleaned the O-ring and the top of the filler tube with methyl hydrate / methanol, lubricated the O-ring with Seal Saver (a lube for latex/rubber seals), flipped over the O-ring, and put it back on the gas cap. Problem solved. My guess is that the O-ring had dried out and flattened out over time, such that it could no longer keep the pressure seal. Once the other side flattens out, I'll replace it. 2007 JK.
I need some advice since the dealer has shut me out 3 times and made me replace a bunch of stuff for no reason. Ive replaced the gas cap, integrity pump and yes i did purchase the o ring that goes with that new pump(little plastic part underneath the jeep aprox $35). They smoke tested it several times and found no leaks anywhere in the jeep. They then proceeded to tell me that my gas tank needs to be replaced because there is "flex" in the gas tank. Im at the point where im ready to buy one of those tuners that can just shut your check engine light....some one help
When they smoke tested it they identified the tank as the issue? I'm still on the original gas cap that came with my 07 and had a similar experience but found a small leak in a line that was rubbing on the battery. Also check your evap canister
__________________ Life isn't about how you survive the storm, but how you dance in the rain