Jeepinjim

Today while driving my 13 JKU with 41100 miles on it, the check engine light came on along with the gas cap warning, u checked the gas cap and retightened the cap and the check engine light stayed on, how can I get it to go off? Do I need to go to the dealer? Thanks in advance for your help!!!

rob_engineer

Disconnect the neg terminal on the battery for 15 minutes. Reconnect and see if light comes back on. If so, one place to look is a hose going to the Evap canister by firewall on driver side. Grab that hose and twist it a little bit.
My gas cap light on my 2012 came on a couple of years ago and the tweak of that hose on the Evap canister fixed it.

Jeepinjim

Thanks, I will give that a try and let you know!!

PugJeep

I had that happen to my 2013 jku also. After tightening the gas cap it went off but took a while of driving for it to finally go off. It has happened a few times but has alway gone off after a while.

Jeepinjim

I did what Rib suggested and that worked!! Thanks again for the help!!

Jeepinjim

I meant Rob, sorry

rob_engineer

I've been called worse. Please clarify what made your error message go away - disconnecting the battery or tweaking the hose.

Jeepinjim

Disconnecting the neg battery cable, again thank you!