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Old 08-04-2012, 01:15 AM   #61
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I am at 14300 miles and my engine light came on today. My gas cap may have been loose. Hoping that was the issue!! Drove it tonight after tightening the cap and the light is still on. That sensor takes a little time to clear once the issue is fixed right?

The engine seems to be running ok. Not rough or choppy like some have described theirs. I hope I don't have any major issues. My wife won't let me hear the end of it. She's a Honda (Acura now) girl through and through.

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Old 08-04-2012, 01:25 AM   #62
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from the off position, turn the key on, then off, then on, then off, then on and keep it on. hold the key inwards while you do this. that's 3 times. it'll tell you which code is displayed.

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Old 08-04-2012, 06:10 PM   #63
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Quote:
Originally Posted by Blastek
from the off position, turn the key on, then off, then on, then off, then on and keep it on. hold the key inwards while you do this. that's 3 times. it'll tell you which code is displayed.
Um... I've got no codes man. I'm sure I'm doing it wrong. Not sure I follow you after you turn it on 3 times.
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Old 08-04-2012, 08:42 PM   #64
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Quote:
Originally Posted by perkalater79

Um... I've got no codes man. I'm sure I'm doing it wrong. Not sure I follow you after you turn it on 3 times.
Make sure you keep the key pushed in while you turn!
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Old 08-04-2012, 08:45 PM   #65
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Originally Posted by Blastek View Post
from the off position, turn the key on, then off, then on, then off, then on and keep it on. hold the key inwards while you do this. that's 3 times. it'll tell you which code is displayed.
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Originally Posted by perkalater79 View Post
Um... I've got no codes man. I'm sure I'm doing it wrong. Not sure I follow you after you turn it on 3 times.
Add mine to the list of misfiring cylinders... the code that came up was P0302 - Cylinder 2 Misfire.

Use the instructions Blastek provided but make sure you have your display on Trip B. Do not turn the engine on. You will start with the key on the off position....all you are going to do (on-off, on-off, and on) do it fast and do not allow the dash light turn on between the cycles, and you should be able to get the codes.
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Old 08-04-2012, 09:53 PM   #66
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Thanks! Ok. Here we go.

-d0nE-

Any idea what that means. I am having a hard time finding anything meaning from Google.

I got something up once but could not ready it fast enough before I accidentally turned the key off. So I did it again and got the above.

Know what that means? Oh and I started her up and the engine light is still on.
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Old 08-04-2012, 10:08 PM   #67
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Thanks! Ok. Here we go.

-d0nE-

Any idea what that means. I am having a hard time finding anything meaning from Google.

I got something up once but could not ready it fast enough before I accidentally turned the key off. So I did it again and got the above.

Know what that means? Oh and I started her up and the engine light is still on.
if it did not give you any numbers and the only thing that appears is done.... your jeep has not picked up any problems to record the codes.
You can redo the whole process and if there are any codes stored they will be displayed.
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Old 08-04-2012, 10:14 PM   #68
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Quote:
Originally Posted by j.luis

if it did not give you any numbers and the only thing that appears is done.... your jeep has not picked up any problems to record the codes.
You can redo the whole process and if there are any codes stored they will be displayed.
Cool. Thanks. I guess that somewhat reassuring. Does a lose gas cap throw a code? Any idea what else would cause the engine light?
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Old 08-04-2012, 10:32 PM   #69
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Cool. Thanks. I guess that somewhat reassuring. Does a lose gas cap throw a code? Any idea what else would cause the engine light?
what code did you get?

Check the codes on the link posted below.

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Old 08-04-2012, 11:54 PM   #70
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Quote:
Originally Posted by j.luis

what code did you get?

Check the codes on the link posted below.

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The code that popped up was "-d0nE-". Not finding any documentation on that code. If its not a "real" code, what might cause the engine light to go off?
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Old 08-05-2012, 08:05 AM   #71
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Quote:
Originally Posted by perkalater79

The code that popped up was "-d0nE-". Not finding any documentation on that code. If its not a "real" code, what might cause the engine light to go off?
Done <--- lol

Maybe it's just telling you the scan is done with 0 codes present.
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Old 08-05-2012, 09:18 AM   #72
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Quote:
Originally Posted by kjeeper10

Done <--- lol

Maybe it's just telling you the scan is done with 0 codes present.
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.
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Old 08-07-2012, 04:50 PM   #73
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Quote:
Originally Posted by perkalater79

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.
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Old 08-20-2012, 10:51 AM   #74
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My 2012 just kicked on the engine light this morning..... I started reading up on it so I'll see tonight what codes its throwing out. I thought it was suppose to sound like a diesel truck.
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Old 08-20-2012, 11:18 AM   #75
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1. A CPU update will not solve a CEL. OBDII regulations state that CEL's are for emissions related malfunctions. Computers do not get old and nothing changed on your car to warrant an "update". It is dealer BS. They just clear the computer codes and hope for the best (if the vehicle is running well). For them, it's worth it and personally a strategy I agree with. A misfire may not mean all hell is about to break loose. It may never happen again. If it comes back on, then the dealer will actually investigate a bad part.

2. The problem does not sound widespread. How many 2012's sold. I see 5 posts.
I am hesitant to reply to this thread due to its age, but the above is such BS I can't let it go.

In response to item #1: A reflash can absolutely fix a CEL. Yes there are regulations governeing OBDII codes and the parameters that set them. However, for every OBDII code you have, there is a corresponding code for the same problem that is manufacturer specific and has parameters defined by the manufacturer. The only notable difference from a dianostic point of view is the number one in front of the code number. A generic OBDII code of P0302 would have a manufacturer specific number of P1302. Many reflashes have fixed erroneous manufacturer specific codes as well as generic OBDII codes that are set for the wrong reasons. There have a been many cases of misfire codes being set from hitting bumps in the road that were solved with computer reflashes. GM has even fixed a problem throwing the AC belt off during engine start with a PCM reflash. The only reason I don't agree with using a PCM reflash on this problem is because it is so widespread that everyone pretty much knows it is a waste of time and is only done to delay the needed repair until later.

For item #2, look around. This is quickly becoming an epidemic.

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I read a thread like this, and the other thread about the Pentastar engine and the problems with it, and I begin to question if a JKU is the right choice in a vehicle. People say **modern** vehicles are all built well and don't have many problems, but clearly that is not the case.
I don't know who said that, but they were wrong. The number of moving parts in a vehicle has increased by an order of magnitude over the last 2 decades and all of those parts are made as cheaply as possible. We pretty much have the 50 year old technology figured out, which only covers suspension/steering, brakes and axles. All of the newer stuff is still a crap shoot.
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Old 08-24-2012, 11:30 AM   #76
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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??????
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Old 08-27-2012, 12:07 PM   #77
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Unhappy Issues with cyl#6 misfire

Just brought the jeep in for check engine light. They said the misfire is caused by a leaky valve. I got 17000 km's. Any idea if this problem can happen again to other cylinders or if its a manufacture defect? Thanks
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Old 08-27-2012, 11:04 PM   #78
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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.
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Old 08-28-2012, 06:59 AM   #79
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That is insane... I thought I had it bad with my old volkswagen!
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Old 08-28-2012, 07:59 AM   #80
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Originally Posted by glowingghoul View Post
Originally Posted by snikt
this is one of like 200 threads on the issue

more like 500 posts


You said 200 threads and 500 posts. You're either an idiot, or a troll.
Dude you went nuts and it was uncalled for in my opinion...

I am new here and I DID see A LOT of posts on this...

No one is going to sit here and coun't posts but the fact is, it happenned enough that Chrysler REDESIGNED AND RETOOLED the cyclinder head..

If it was only '5' people or a 'small', I dont think that would have happenned???..
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Old 08-28-2012, 09:15 AM   #81
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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.
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Old 08-28-2012, 05:13 PM   #82
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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.
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Old 09-05-2012, 05:18 PM   #83
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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.
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Old 09-07-2012, 04:50 PM   #84
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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.
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Old 09-13-2012, 02:02 PM   #85
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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?
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.
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Old 09-29-2012, 03:37 PM   #86
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I just had to drop my 2012 Jeep Wrangler Artic off at the dealer for the CEL same story. 1st dealer flashed PCM and 25 min later it came back in. Took it to another dealer and he told me that it was a "known issue" and it will take about a week to fix.
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Old 09-29-2012, 06:01 PM   #87
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16k miles on my 2012 and cel came on. Dealer said nees a cylinder head.

Took only 5 days to for the head to come in.ill have it done next week.
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Old 09-29-2012, 11:18 PM   #88
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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.


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?
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Old 09-29-2012, 11:25 PM   #89
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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?
You should return it "lemon law"
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Old 09-29-2012, 11:27 PM   #90
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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.
That light won't flash (although it might burn out at some point, haha).

You can buy a cheap code reader to read it and clear the code and turn it off. Google the code. If it comes back on, you may have a persistant problem. Might take a couple hours to check the head, not a couple of days. (but a couple of days to replace it)

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