2012 JKU Rubi Check Engine Light - Misfire Cylinder 6 - Page 5 - Jeep Wrangler Forum
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Old 07-31-2013, 08:40 PM   #121
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Just crossed 30k miles this weekend. Mine was a day one build as I watched it on the online tracker the day they started building the 12's. No unusual ticking, lack of power or dropped mpg yet. I kind of wish that if it were going to be a problem, that it would go ahead so I could get it over with.

Oh, I beat the snot out of it every day. I am not easy on it by any means.

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Old 07-31-2013, 09:54 PM   #122
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I wondered about the 100k/5yr warranty. That makes sense. Glad to hear it... Thanks for sharing.

Regarding the "ticking" folks are referring to, mine makes more of a clacking clacking noise and I've isolated it (as best I can) to the drive train because it goes always shortly after I depress the clutch and some spinning part slows to a halt. When I let the clutch out, it starts up again.

I assume this is not the ticking related to the engine people are referring to? Right?

Any thoughts on what that might be? Should I take it in and have them look at it? It's been doing it for a long time! Since before 10k miles. Maybe even sooner. Never seemed to cause any issues and I only hear it at very low speeds or when stopped so it's not a nuisance.

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Old 08-01-2013, 06:34 AM   #123
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I read the page on finding your build date, but was unclear because it went back and forth. Has anyone successfully identified the date?
I got the date off the Factory Build List. Contact Chrysler (I don't remember if it was by phone or email), give them the VIN, and they emailed me the list.
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Old 08-02-2013, 08:30 AM   #124
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observations a year later

You know, mine never ran rough, never lost power, never made a ticking noise, never got worse fuel mileage... it was just that the check engine light would not go off. Not being able to use the remote start was the most inconvenient thing about it, up until I had to leave it at the dealership for a week, while they changed the head.
BTW, if you've had that done, check all the wiring harnesses that are supposed to be routed across the the topside... 20K miles AFTER my head replacement, check engine light came on, along with the traction control light... this time I did lose power, and the tranny wouldn't shift automatically (it would bump shift, but the computer had quit controlling shift-point) anyway, I limped into the dealer (different one) and they quickly diagnosed it; the dealer who had replaced the heads had failed to properly secure the wiring harness, and it had worked its way to the point it was in a minor bind, which, over the course of 20K miles, eventually caused it to break a couple of pins in the connector.
My biggest gripe in all this is that Jeep/Chrysler service writers and counter-jockeys are STILL pretending like they don't know there's a problem with those engines. The fact that there are still message boards all over the internets with people going "my CEL came, dealer says its a misfire cyl 2... what up with that; anybody else heard about that?"
Some dealership's service managers are more honest than others, and it's very clear they've been told to play ignorant. I understand they had a big problem, what with fixing the tooling that caused the defect, and then manufacturing enough heads to catch up with the ones already sold, and not slow down production of new ones... but who says you don't slow down production of ones to sell until you're damned sure you fixed all the ones you already sold? That's what a company that wanted to ensure the loyalty of its customers would do. I love my jeep, but I really hate the way Chrysler has dealt with this. I'm in the market for a hiway car (but not a car), and would love to have a Grand Cherokee Overland with a Hemi. But first I have to decide whether to give this company any more of my trade.
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Old 08-03-2013, 06:25 PM   #125
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The dealers have learned to lie from Obama! Chrysler sent me an email saying there is no known problem with the 2012 Wrangler cylinder heads! So like Obama we should agree.!NOT!
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Old 08-03-2013, 09:32 PM   #126
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Amazing that the dealers also pretend that a software "reflash" will fix a mechanical misfire when you walk in, most likely knowing full well that you'll be back shortly.

God I hate those shady lying stealerships...they not only steal your money but your time and sanity.

Funny how I never had any issues with Infiniti, Acura, or Lexus dealerships, though. The service makes you want to go there...though you probably won't ever have to.
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Old 08-04-2013, 01:26 AM   #127
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For a lower profit margin vehicle, can you blame them for trying to save a buck by trying to software reset?
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Old 08-12-2013, 12:27 AM   #128
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Hey I'm having the same problem with mine. The dealership I went to was truthful about it but also has a waiting period of three weeks and the part is also on back order. Do you guys know what's the worst that can happen with me driving my jeep. Also my jeep has almost 18,000 miles, do you guys know if its still covered under warranty? Thanks
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Old 08-12-2013, 12:33 AM   #129
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For a lower profit margin vehicle, can you blame them for trying to save a buck by trying to software reset?
Lower profit margin? .. I would bet a weeks pay Chrysler enjoys a healthy 60% margin on this platform.

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Old 08-12-2013, 05:30 AM   #130
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Hey I'm having the same problem with mine. The dealership I went to was truthful about it but also has a waiting period of three weeks and the part is also on back order. Do you guys know what's the worst that can happen with me driving my jeep. Also my jeep has almost 18,000 miles, do you guys know if its still covered under warranty? Thanks
Definitely under warranty. When I had mine done, the "report" found one of the exhaust valves was sticking, and was burned and pitted. I would guess that continued driving would further damage the valve resulting in more misfires, rough idling, and lower milage, but otherwise safe to drive.

I had noticed some rough idling a few weeks prior to the CEL light coming on - so the valve was possibly sticking then, but not causing enough misfires to trigger the CEL.

As for the backorder - I had mine done last week, and it only took a few days for them to get the head (I'm in So. Westchester - not too far from No. Jersey). Perhaps try another dealer?
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Old 08-13-2013, 10:36 PM   #131
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Yeah I talked to the dealer today and thy said its covered under the 3 years 36,000 mile warranty. And I scheduled an appointment at a different deal that had it in stock. For Thursday, I haven't noticed any drop in mpg or rough idling the only rough idling I've noticed is when the car is warming up.
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Old 08-14-2013, 08:02 AM   #132
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Yeah I talked to the dealer today and thy said its covered under the 3 years 36,000 mile warranty.
Actually, it's covered under the 5 year/100,000 mile powertrain warranty. (Cylinder heads are an engine component).
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Old 08-14-2013, 04:20 PM   #133
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Even better!
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Old 12-12-2013, 10:23 PM   #134
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So i may be in the same Boat my jeep been back and forth for the last few weeks. and months $ months ago traction control light went on and stayed on. and weird noise coming from engine. Turns out bad sensor and water pump. finally parts came in last week when i got a check engine light. they replaced the water pump i left everything was good. 2 days and engine light came back on for few hrs. i called them came in and my sensor was ready they switched that out top me engine light is all clear. on the way home light came back on. calling again to bring it back also going to check the code myself tomorrow. my truck has 17,000 miles on it 2012 Unlimited sport.
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Old 05-20-2014, 03:42 PM   #135
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Mis-fire here too

I had the check engine light come on shortly after i bought my 2012. And it went out and didn't come back on. Now at 36,600 miles it has come on again and they are saying they have to replace the cylender heads. Lovely!!!!!!!!!!! NOT!!!!!!!!! Thankfully i bought the extended warranty.
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Old 05-20-2014, 06:12 PM   #136
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EVERY 2012 Wrangler will have a head failure! Engineering design fault which does not discriminate!
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Old 05-20-2014, 06:23 PM   #137
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I had the check engine light come on shortly after i bought my 2012. And it went out and didn't come back on. Now at 36,600 miles it has come on again and they are saying they have to replace the cylender heads. Lovely!!!!!!!!!!! NOT!!!!!!!!! Thankfully i bought the extended warranty.
Shouldn't it be cover under the 5/100 drive train warranty?

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Old 05-20-2014, 10:50 PM   #138
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Shouldn't it be cover under the 5/100 drive train warranty?

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Yup. 5/100.
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Old 05-21-2014, 06:29 AM   #139
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My 2012 started coming on about 13k miles. I clear it sometimes it would stay off a week or so. Lately been coming on sooner. Never runs rough and no loss of power. Calling dealer today. Sure it's a head problem. Throws PO302 code.

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