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2012 JKU Rubi Check Engine Light - Misfire Cylinder 6

72K views 160 replies 93 participants last post by  JKwrangler12 
#1 ·
A check engine light illuminated on my 2012 Rubi JKU (10,800 miles) this past Sunday. The code indicated "misfire cylinder 6". Took it to Maxwell Jeep in Austin Monday morning and got a call Monday afternoon saying it was ready to be picked up. The service rep said they flashed the computer with a program update and that the problem was solved.

I picked it up this morning and drove it for about 20 miles before the check engine light illuminated once again. Took it back to the dealer and received a call this afternoon saying that they were going to have to go into the engine to find the problem and should know something by tomorrow afternoon.

Has anyone else had a similar problem?
 
#73 ·
perkalater79 said:
See j.luis previous post. That's what it sounds like. However my engine light is still on, so I'm wondering what would cause it to be on and not have any codes.

Guess I'll take it into the dealership next week.
Well.... Engine light went of on its own. I'm guessing it was a gas cap issue.

Glad I don't have a header or cylinder issue. At least not yet.
 
#76 ·
Back in the shop for the same problem

Back in May I posted a thread on here to let everyone know about the check engine light coming on in my 2012 Jeep Wrangler Unlimited. Well here it is August of 2012 and I got my Jeep brand new in November of 2011. I drive about 100 miles a day so it already has over 22,000 miles on it. Well guess what.......... They replaced the cylinder head on the left hand side back in May 2012 and I got it back after two weeks in the shop. I went back the first weekend of August 2012 to get the oil changed after 5100 miles and there is an oil leak on the left hand side coming from around the cylinder head, gee the same one that got fixed. Well my Jeep has been in the shop for a week now I haven't heard a word from the dealership except that they are talking Chrysler about the problem. I will just say that the dealership is in Suffolk, Va for now.

Finally got to talk to someone at Chrysler this morning and they told me that they are looking into the problem with the dealership and that they aren't sure how to fix it.

My Jeep has been off the road for a total of 20 days now because of this problem and for the last week no one from the dealership has told me anything other than, "We are working with Chrysler on the problem."

I spent 30 minutes on the phone this morning with the representative from Chrysler and he was somewhat helpful but couldn't tell much other than they are working to solve the problem.

I still haven't heard a word from the dealership in Suffolk, Va. (hint hint it is a Jeep dealership on Route 460) and now I have payment coming up on a Jeep that I can't drive and have no idea when or if I will get it back.

At this point in the game I don't even want it back and maybe it is time to go back to driving Toyota's again. By the way that is what I did after my 1994 Jeep Wrangler broke and they finally fixed it. Oh ya and I got that one brand new back then also.

The representative from Chrysler did say they he would look into me get reimbursed for one of payments on this Jeep considering the problems I have had with it but this was only brought up after I suggested it to him.

Is anyone else out there having these kinds of problems with their new Jeep?

I am at a point where I don't even want this Jeep back and I am glad that I haven't spent any money on a lift or anything extra yet.............

I have a complaint on fill now with Chrysler and I am getting ready to fill a complaint with the BBB about this problem also.

I hope that I can get this problem fixed and that at the least Chrysler will put a new engine in the Jeep I have but I would rather have a new Jeep and I feel that would be the best thing for Chrysler and the nameless dealership to do at this point.

So any suggestions from the crowd out there??????
 
#78 ·
Mine had the "new"head placed on it in May and three weeks ago they found oil leak. They put oil dye in the engine and my Jeep has been at the dealership for a week an a half now. A representative from Chrysler finally called me and said they are working with the dealership to fix the problem. No call at all from the dealership since my Jeep has been there other then to say they are working with Chrysler To fix the problem. This is a total of 24 days that my Jeep has been in the shop for this problem.
 
#81 ·
Agreed Todd. The simple fact is that there was a part redesign and they don't do that unless there was a serious design fault with the first part. Regardless of what some of the corporate troll shills here say it still boils down to that. Corporations do NOT do that unless they know they have a serious problem.
 
#82 ·
The bottom line is that they need to do something about this and start a recall or something on this problem. As it stands right now it appears that there are going to be lots of repairs going on with these Jeeps. I am enjoying putting ALOT of miles on the loaner vehicles seeing as I drive about six to seven hundred miles a week.
 
#83 ·
Me too !!!!

15,000 miles and a check engine light I figure no big deal I'll drop it off on Monday night and pick it up on Tuesday with a brand new gas cap and all is well with the world. Well it is now Wednesday of the following week and I'm looking at the end of next week while we wait for a new head and camshaft that are apparently on backorder.
 
#84 ·
Just got the news from my dealer on my 2012 Wrangler, check engine light came on now dealer says it needs a new cylinder head, vehicle has just over 11,000 miles bought it brand new 4 months ago and already needs major engine work. The code says it's a misfire on #2 cylinder which then led to a new head. Jeep please fix this, love the vehicle but don't want to sink big bucks in to a new vehicle.
 
#85 ·
I have a 2012 Wrangler Sahara with the same problem. Code indicated that #2 cylinder was misfiring. They reset the computer and light came on after 15 minutes. Dealer said either a computer "glitch" or something wrong with the engine. They want the vehicle for 2 days to run tests. So far have driven about 5K miles with light on. Dealer said just continue to drive the vehicle until the light begins to flash.
 
#88 ·
I have a 2012 Wrangler Sahara with the same problem. Code indicated that #2 cylinder was misfiring. They reset the computer and light came on after 15 minutes. Dealer said either a computer "glitch" or something wrong with the engine. They want the vehicle for 2 days to run tests. So far have driven about 5K miles with light on. Dealer said just continue to drive the vehicle until the light begins to flash.
:eek:

Why didn't you let the dealer take the vehicle for two days to run the tests? Would they not give you a loaner?

You have been driving around for 5000 miles in a brand new Jeep with a check engine light on?
 
#92 ·
Cylinder 6 Misfire

Greetings, all! I have the same issue. I am getting my Jeep back tomorrow. I live in Jacksonville, FL and had to wait several days as they had 10 Jeeps in at the dealership with the same issue. They are replacing the cylinder. Do you think this will solve the problem? If not, what type of legal recourse do we have as a group? I had 14,000 miles on mine when the light came on.
 
#93 ·
Greetings, all! I have the same issue. I am getting my Jeep back tomorrow. I live in Jacksonville, FL and had to wait several days as they had 10 Jeeps in at the dealership with the same issue. They are replacing the cylinder. Do you think this will solve the problem? If not, what type of legal recourse do we have as a group? I had 14,000 miles on mine when the light came on.
I'm sure you mean replacing the cylinder head. You can't replace a cylinder. Once the head is replaced, you'll be fine.
 
#96 ·
Same issue here. 2012 JK Rubicon w 8600 miles.
#6 cylinder misfiring.. Took into dealer when I heard ticking, they said it was normal.. One month later, check engine light was on and no ECO as expected.
Scanned code to show the cylinder issue.

Took to dealer today, tried swapping coils, same problem, so tomorrow it's getting a new head.
I will be glad this issue is fixed.. Power loss and MPG lose were dead give aways for me BEFORE the light ever came on.
 
#98 ·
2012 Jeep wrangler unlimited (+/-26,000 miles)

WTF, yes Same issue here: Took the Jeep into Dealership service center for "check engine light" issue and had memory flashed. Not long after picking the Jeep up from the Jeep service department "check Engine light" comes back on. Again the vehicle logged a misfire with Cylinder #4.

So, Back to the Dealer/service center, Jeep needs new head according to the experts. Drop Jeep off on Monday morning for engine work and pick up on Friday of the same week.

All seems back to normal, until I began a 2 mile hill climb to my house (normal driving conditions, nothing crazy). Just as I'm approaching the top of the hill all hell breaks loose; Coolant begins spraying out hitting the windshield and steam is flowing out from underneath the hood. Pulled into the driveway and opened up the hood to find a radiator hose blown off the radiator, smaller hose to air-intake (air filter box) disconnected, additional hoses not clipped back into place and radiator is seemingly empty.

One would think that I'm eligible for a new engine?

any advice would be great.

Thanks
 
#99 ·
I would highly doubt a new engine from what u described. The dealer should tow it back. Fix all the loose hoses and anything else that wasn't put back together correctly. Fill fluids. And detail the engine bay and wash the jeep. U might haggle for gas or a complete detail.
 
#101 ·
Totally! I have a 2012 Jeep Wrangler 2 door and at 14,000 miles the check engine light came on and bam they had to replace the cylinder head. But they never said anything about flushing the computer software in it. Everything seemed back to normal up until this past week and a half when loss of power occurs occasionally when it seems to be in a higher gear but I don't know if that is the problem or not. I just hope It doesn't have anymore problems.
 
#102 ·
Cyliner #6

I have 18,500 on my 2012 Jeep Wranger and the engine light came on when I was driving to work on a recent Monday morning. Dropped it off at the Dealer it was on my way to work. An hour later the service wrighter called said there was problem with the valve on cylinder #6 and the head needed to be replaced. He said they have a head in stock, replaced the head and picked up Tuesday afternoon. This did not take very long to fix in my case compaired to some of the other posts. I hope I don't have future problems.
 
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