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Old 02-18-2014, 07:15 PM   #1
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Check Engine Light @ 10,500 miles??

Evening,

I've had my 2013 JKU for about two weeks now. It had 9,800 miles when I bought it and seemed to be problem-free. I'm driving along this evening and all of a sudden, "DING," and the check engine light's on. Nothing feels abnormal, the gas cap is on tight, and I get nothing when I check for codes. The only thing out of the ordinary that I've done lately is climb a muddy hill in 4-hi. Thoughts? Thanks in advance.

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Old 02-18-2014, 07:41 PM   #2
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My 2014 jk had 180 miles when I got it and I got the check eng light around 220miles I took it to the dealership and they found nothing. Ghost in the machine maybe? It's been running like a Champ ever since,just make sure you have documentation in case of a lemon.

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Old 02-18-2014, 08:39 PM   #3
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Originally Posted by DuxSieben View Post
My 2014 jk had 180 miles when I got it and I got the check eng light around 220miles I took it to the dealership and they found nothing. Ghost in the machine maybe? It's been running like a Champ ever since,just make sure you have documentation in case of a lemon.
Thanks for not thinking the worst right off the bat.
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Old 02-18-2014, 08:47 PM   #4
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Sarcasm? Haha don't worry I panic when I first saw it but it's seems its quite common. Topping off the gas or stalling out will trip a sensor or so I'm told, but I'm sure your JKU will pull thru.
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Old 02-18-2014, 08:56 PM   #5
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Sarcasm? Haha don't worry I panic when I first saw it but it's seems its quite common. Topping off the gas or stalling out will trip a sensor or so I'm told, but I'm sure your JKU will pull thru.
Yeah. I'm not overly worried. It's still under warranty, so there's that. Still, just one of those aggravating things, you know? First new car I've purchased in 10 years, and this happens within two weeks of ownership. My last car's instrument panel was lit up like a Christmas tree by the time I traded it on my Jeep. A "check engine" light was the last thing I wanted to see.
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Old 02-18-2014, 10:11 PM   #6
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I would bet $100 it's an EVAP leak. Your gas cap may be tight but from what I've been gathering they leak easy. Take it to auto zone so they can read the codes or if you have a reader DIY. They will do it for free there though and reset it
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Old 02-19-2014, 05:24 AM   #7
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It would be nice to know the actual code. Having said that as mentioned topping off the tank too much can trigger a P0456 small leak in the EVAP Emissions system occasionally. That is exactly what would happen to my wife's Liberty a few times when she had the gas station fill it. It drove me nuts, now I gas it myself, if the pump clicks at $30.09 for example, I don't round up to $31.00, I round up to $30.10 or $30.25, and no more. It has been over 3 years since the last CEL doing that.
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Old 02-19-2014, 04:16 PM   #8
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Well, good call guys. It was the EVAP code. The guy at the dealer shop suggested that the O-ring seal above the threads of the gas cap may have broken down and gone bad. Said it's possible that it happened because the Jeep sat in the lot for a while during the cold months and was recently reintroduced to daily driving. He suggests that I coat it in Vaseline if it happens again.

Either way, no harm no foul. Thanks for responding.
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Old 02-22-2014, 08:32 AM   #9
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The light came back on yesterday. Guess I'll try the Vaseline trick and see what happens (unless someone knows better and can talk me out of it before it's too late).
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Old 02-22-2014, 08:17 PM   #10
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Vaseline will break down the rubber gasket. Get some silicone O ring seal. Sold at pool suppliers.It is thick like Vaseline and will not degrade rubber.

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