2012 JKU Rubi Check Engine Light - Misfire Cylinder 6 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 02-29-2012, 09:01 AM   #1
Newb
 
Join Date: Oct 2011
Posts: 1
2012 JKU Rubi Check Engine Light - Misfire Cylinder 6

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?

dbullion is offline   Quote Quick Reply
Old 02-29-2012, 09:09 AM   #2
Jeeper
 
pkmcd99's Avatar
 
Join Date: Jan 2012
Posts: 2,117
Sounds like a bad coil

pkmcd99 is offline   Quote Quick Reply
Old 02-29-2012, 11:09 AM   #3
Newb
 
Join Date: Feb 2012
Posts: 1
My New 2012 wrangler unlimited rubicon wth 12,347 miles on it had the same problem. The dealer flashed the computer and the same thing happened to me...light came back on a day later. It is now sitting at the dealership getting a new head!!! Sound like you and I are having the same problem as the other people in the "ticking jeep" thread. My rubicon was delivered in late August of 2011.
TommyD is offline   Quote Quick Reply
Old 03-17-2012, 08:00 PM   #4
Jeeper
 
Join Date: Sep 2009
Location: Calvert county, Southern Maryland
Posts: 569
ok, this virus is spreading. my check engine just came on. i got mine back in august. gonna take it in monday. lets hope its just something small. gonna have to check out the thread "ticking jeep".

cass
tcass is offline   Quote Quick Reply
Old 04-03-2012, 05:45 PM   #5
Newb
 
Join Date: Apr 2012
Posts: 1
2012 Jeep Wrangler Check Engine Light at 10k miles.

I have a 2012 Jeep Wrangler Unlimited sport. I took it to the dealer ship two weeks ago and they flashed the computer. I drove off the dealer lot and five minutes later the light came back on. I took it back in and they are telling me that they need to order the cyl heads and replace them. I bought my jeep in Oct 2011. I had 10500 miles on the engine when the light came on.
salepor is offline   Quote Quick Reply
Old 04-03-2012, 06:39 PM   #6
Jeeper
 
Rb1boxer_3's Avatar
 
Join Date: Oct 2011
Location: corpus christi
Posts: 435
Wow same here I have 14,000 miles and it just came on dealer said the exact same thing that it needed an update. And bam a few miles later it's on.
Rb1boxer_3 is offline   Quote Quick Reply
Old 04-03-2012, 06:44 PM   #7
Jeeper
 
snikt's Avatar
 
Join Date: Mar 2012
Location: Littleton, CO
Posts: 665
This problem sounds pretty wide spread, we need a poll or something of '12 owners and how many are having the problem
snikt is offline   Quote Quick Reply
Old 04-03-2012, 07:08 PM   #8
Jeeper
 
Join Date: Mar 2012
Posts: 180
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.
Jurhip is offline   Quote Quick Reply
Old 04-03-2012, 07:20 PM   #9
Jeeper
 
snikt's Avatar
 
Join Date: Mar 2012
Location: Littleton, CO
Posts: 665
Quote:
Originally Posted by Jurhip View Post
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.
This is one of like 200 threads on the issue

More like 500 posts
snikt is offline   Quote Quick Reply
Old 04-03-2012, 07:32 PM   #10
MallCrawler

WF Supporting Member
::WF Moderator::
 
kjeeper10's Avatar
 
Join Date: Feb 2011
Location: Connecticut
Posts: 31,437
Quote:
Originally Posted by snikt

This is one of like 200 threads on the issue

More like 500 posts
Lol....

But sorry guys. Seems like a common problem
__________________
2007 Rubicon/Rock Krawler 2.5 coils/Rancho 7000 shocks/Teraflex monster TB/Synergy highsteer,tie rod, ball joints/Hankook MT 315-75-16 on Level 8 ZX's/MC front SB links/Rancho geo brackets & shocks/Fox ATS stabilizer/Adams front DS=Frankinlift from hell.

Lifting your JK? Read this!!



Click HERE to become a WranglerForum Supporting Member!
kjeeper10 is online now   Quote Quick Reply
Old 04-03-2012, 07:32 PM   #11
Jeeper
 
Join Date: Sep 2011
Posts: 200
Quote:
Originally Posted by snikt View Post
this is one of like 200 threads on the issue

more like 500 posts
bs.
glowingghoul is offline   Quote Quick Reply
Old 04-03-2012, 07:34 PM   #12
Jeeper
 
Join Date: Sep 2011
Posts: 200
Quote:
Originally Posted by kjeeper10 View Post
Lol....

But sorry guys. Seems like a common problem
What the hell are you basing that on? That BS post about 200 threads?

It's like every non 2012 owner WANTS this to be a problem.

Most would still rather have the Pentastar repaired, then a perfectly (oil burning) working 3.8.
glowingghoul is offline   Quote Quick Reply
Old 04-03-2012, 07:35 PM   #13
Jeeper
 
snikt's Avatar
 
Join Date: Mar 2012
Location: Littleton, CO
Posts: 665
Quote:
Originally Posted by glowingghoul View Post
What the hell are you basing that on? That BS post about 200 threads?

It's like every non 2012 owner WANTS this to be a problem.

Most would still rather have the Pentastar repaired, then a perfectly (oil burning) working 3.8.
Don't blame us because you are blind

Look on the very first page, there is a 19 page thread on the issue, and there are other 4-5 page posts scattered around
snikt is offline   Quote Quick Reply
Old 04-03-2012, 07:37 PM   #14
Jeeper
 
Join Date: Sep 2011
Posts: 200
Quote:
Originally Posted by snikt View Post
Don't blame us because you are blind

Look on the very first page, there is a 19 page thread on the issue, and there are other 4-5 page posts scattered around
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.
glowingghoul is offline   Quote Quick Reply
Old 04-03-2012, 07:41 PM   #15
Jeeper
 
snikt's Avatar
 
Join Date: Mar 2012
Location: Littleton, CO
Posts: 665
Quote:
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.
Ever heard of exaggerating? Jeez you are annoying

http://www.wranglerforum.com/f33/upd...ad-137608.html
555 posts here

http://www.wranglerforum.com/f33/201...ed-131728.html
37 here

http://www.wranglerforum.com/f33/che...ht-148897.html
15 here

http://www.wranglerforum.com/f33/201...ng-139471.html

of course not every person in every post has the issue, but it's obviously common

etc.....
snikt is offline   Quote Quick Reply
Old 04-03-2012, 08:46 PM   #16
Jeeper
 
Join Date: Mar 2012
Posts: 180
Most large threads have the same people posting, so number of posts is low.
So lets say 500 posts, 75% being non-repeat posts (which I think is generous). That 375 people.

How many 2012 Wrangler have been sold. Maybe 40,000 (they sold like 9300 in February)?

Now how many of the 375 posts are about the same problem. Lets say 80% (which I think is also generous).

So, less than 1%. That is not common. Its common on the internet. It is not a "common" issue. It sucks when it happens to you, but that doesn't make it any more common.
Jurhip is offline   Quote Quick Reply
Old 04-03-2012, 08:52 PM   #17
Jeeper
 
Join Date: May 2011
Posts: 2,025
Quote:
Originally Posted by Jurhip View Post
Most large threads have the same people posting, so number of posts is low.
So lets say 500 posts, 75% being non-repeat posts (which I think is generous). That 375 people.

How many 2012 Wrangler have been sold. Maybe 40,000 (they sold like 9300 in February)?

Now how many of the 375 posts are about the same problem. Lets say 80% (which I think is also generous).

So, less than 1%. That is not common. Its common on the internet. It is not a "common" issue. It sucks when it happens to you, but that doesn't make it any more common.
I hope you're right, but in a few conversations with people owning 2012 Wranglers, and literally just getting off the phone with a Chrysler tech buddy this problem is gaining steam.
demarpaint is offline   Quote Quick Reply
Old 04-03-2012, 08:52 PM   #18
MallCrawler

WF Supporting Member
::WF Moderator::
 
kjeeper10's Avatar
 
Join Date: Feb 2011
Location: Connecticut
Posts: 31,437
Quote:
Originally Posted by Jurhip
Most large threads have the same people posting, so number of posts is low.
So lets say 500 posts, 75% being non-repeat posts (which I think is generous). That 375 people.

How many 2012 Wrangler have been sold. Maybe 40,000 (they sold like 9300 in February)?

Now how many of the 375 posts are about the same problem. Lets say 80% (which I think is also generous).

So, less than 1%. That is not common. Its common on the internet. It is not a "common" issue. It sucks when it happens to you, but that doesn't make it any more common.
The problem is common not a common problem.., wait does that make sense?
__________________
2007 Rubicon/Rock Krawler 2.5 coils/Rancho 7000 shocks/Teraflex monster TB/Synergy highsteer,tie rod, ball joints/Hankook MT 315-75-16 on Level 8 ZX's/MC front SB links/Rancho geo brackets & shocks/Fox ATS stabilizer/Adams front DS=Frankinlift from hell.

Lifting your JK? Read this!!



Click HERE to become a WranglerForum Supporting Member!
kjeeper10 is online now   Quote Quick Reply
Old 04-03-2012, 08:57 PM   #19
Jeeper
 
Join Date: Mar 2012
Posts: 180
Quote:
Originally Posted by kjeeper10 View Post
The problem is common not a common problem.., wait does that make sense?
You do understand how the internet can "magnify" the prevalence of any issue. Only people that tend to have problems post on these, hence they are "common" on the internet, but not common in real life.

I am not saying there isn't an issue. I just don't think it is a common as these forums make it seem.
Jurhip is offline   Quote Quick Reply
Old 04-03-2012, 08:58 PM   #20
Jeeper
 
Join Date: Mar 2012
Posts: 180
That or you are pulling my leg for the admittedly poor wording
Jurhip is offline   Quote Quick Reply
Old 04-03-2012, 09:07 PM   #21
MallCrawler

WF Supporting Member
::WF Moderator::
 
kjeeper10's Avatar
 
Join Date: Feb 2011
Location: Connecticut
Posts: 31,437
Quote:
Originally Posted by Jurhip
That or you are pulling my leg for the admittedly poor wording
Lol

Confusing myself

I understand you though.

For example "leaks"
__________________
2007 Rubicon/Rock Krawler 2.5 coils/Rancho 7000 shocks/Teraflex monster TB/Synergy highsteer,tie rod, ball joints/Hankook MT 315-75-16 on Level 8 ZX's/MC front SB links/Rancho geo brackets & shocks/Fox ATS stabilizer/Adams front DS=Frankinlift from hell.

Lifting your JK? Read this!!



Click HERE to become a WranglerForum Supporting Member!
kjeeper10 is online now   Quote Quick Reply
Old 04-03-2012, 09:13 PM   #22
Jeeper
 
Blackened's Avatar
 
Join Date: Jan 2012
Location: FL
Posts: 416
__________________
2012 JKU SportS
Black
Auto
3.73
Blackened is offline   Quote Quick Reply
Old 04-16-2012, 02:24 PM   #23
Newb
 
Join Date: Apr 2012
Posts: 2
2012 Sahara CEL-"misfire cylinder 2"

My Jeep purchased in October 2011 began this malfunction at about 12k miles. I have cleared the codes and like others, the CEL promptly reappeared within a few miles. There seems to be a power loss as well as a rougher idle since this issue presented itself.
Book is offline   Quote Quick Reply
Old 04-16-2012, 03:12 PM   #24
Sponsoring Vendor
 
pat@fieldsauto.com's Avatar
 
Join Date: Jun 2010
Location: Glenview
Posts: 3,120
[QUOTE=Jurhip;2215987]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.

That's not entirely true. There are numerous updates from things like the engine to heated seats. I think the '12 Grand Cherokee has 6 or 8 software updates. CEL comes on and the tech searches the database for the fault code and what it is for.

I'm not an expert by any means, but in this day and age a dealer isn't going to clear a code and hope for the best. Chrysler wants it fixed so owner satisfaction will improve. FFV= fix first visit.
__________________
Patrick O'Donnell(Pat@Fieldsauto.com)
Fields Chrysler Jeep Dodge │ 670 W Frontage Rd │ Northfield, IL 60093
847-446-5100 main│ 847-881-8313 direct
pat@fieldsauto.comFieldsChryslerJeepDodge.com
Have Questions About A New Jeep Purchase? CLICK HERE
pat@fieldsauto.com is online now   Quote Quick Reply
Old 04-17-2012, 06:12 AM   #25
Jeeper
 
Join Date: May 2011
Posts: 2,025
I read somewhere that Chrysler was celebrating the production of their millionth Pentastar engine. That is a lot of engines. Are their actually one million Chrysler products on the road with this engine? Or are there a lot of these engines sitting in stock waiting to be installed? Do they fix the engines sitting in stock, or do the install then hoping not all of them are bad? Just wondering that's all. It took Ford and GM years to resolve production issues with a few of their engines, is Chrysler any different?
demarpaint is offline   Quote Quick Reply
Old 04-17-2012, 08:45 AM   #26
Jeeper
 
Dusthol's Avatar
 
Join Date: Jan 2012
Location: Williston nd
Posts: 743
My check enging lite came on. I checked it. Cyl.#6 misfire. Cleared code. Have been driving 2 weeks without any further issues.
Dusthol is offline   Quote Quick Reply
Old 04-19-2012, 06:13 PM   #27
Newb
 
Join Date: Apr 2012
Posts: 3
New Heads for my 2012 JKU Sahara

Well...I am sad to report the following. My 2012 JKU Sahara (currently has 12,700 miles, bought new in late NOV 2011) had the infamous CEL appear ~2wks ago... First visit to a Jeep dealer they flashed the system and cleared the codes and sent me on my way saying it was a random misfire on Cyl 2. And it should all be fixed. Thought OK. Good. Two days later the CEL comes on again! Call same dealer and they said it would be a week before they could get me in... so I called another dealer and they got me right in. New dealer did more thorough investigation and found that I have low compression (cyl 2) and they will need to replace the heads! Can't say I'm happy ..but I can say that Jeep has taken the bull by the horns and is getting it fixed and paying for a rental as the heads are on back order! Apparently there is a back order of over 400. Hope I get moved up the list or the supplier pumps out some parts. Will keep everyone posted.
I will say that if this had happened one mile after my warranty had expired that this post would be less pleasant.
Arkhammar is offline   Quote Quick Reply
Old 04-19-2012, 06:20 PM   #28
Jeeper
 
Kelsey73's Avatar
 
Join Date: Jul 2011
Posts: 1,258
Quote:
Originally Posted by tcass View Post
ok, this virus is spreading. my check engine just came on. i got mine back in august. gonna take it in monday. lets hope its just something small. gonna have to check out the thread "ticking jeep".

cass
At least you got the CEL... mine's ticking pretty good and both dealerships locally gave me the "all normal"
__________________
2012 Wrangler Unlimited Sahara- Bright White
Kelsey73 is offline   Quote Quick Reply
Old 04-19-2012, 07:17 PM   #29
Jeeper
 
Join Date: Feb 2012
Location: DC area
Posts: 148
My head came in this week after 3 check engine codes all cylinder 6 misfire. Only took about 8 days to get the head. Scheduled for install Monday/Tuesday of next week. Will report back after install.
Fishinfool is offline   Quote Quick Reply
Old 04-20-2012, 02:41 PM   #30
Newb
 
Join Date: Apr 2012
Posts: 3
The earliest my heads will arrive is the end of April. Have I mentioned this is the first new vehicle I purchased that had a MSRP of over 40K??

Arkhammar is offline   Quote Quick Reply
Reply

Tags
2012 jku , check engine light , misfire , misfire cylinder 6

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2012 Rollover ESP JK General Discussion Forum 94 02-12-2013 08:34 PM
2012 JKUR Auto what's needed to regear Smyln JK General Discussion Forum 18 03-02-2012 09:44 PM
Backspacing and Lift Question - JKU caveatesq JK General Discussion Forum 4 02-29-2012 11:09 AM
Wiring daystar light switches? Blsport7 TJ General Discussion Forum 4 02-29-2012 10:25 AM



» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 06:36 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC