Rubicon Owners Forum - Reply to Topic
Thread: check engine light Reply to Thread
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:

Register Now

In order to be able to post messages on the Rubicon Owners 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:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
07-20-2019 11:24 AM
Mouse I took the camera with me to the garage, and looked through the hoses and didn't see where that repair was made many years ago. Then, the camera battery was dead as well...I'll have to try again later when I have power for the camera.
07-20-2019 01:54 AM
mariodesmo I've chased that same error code for years, on and off about every year or year and a half. I've found rotten evap hoses and replaced most hoses now, over the years. I'll typically get the code, check and find a rotting rubber hose somewhere or a couple of times it's been a loose gas cap. I make sure and twist the clicking gas cap 5-6 times to make sure it seals. Funny thing is I got the code today... Coincidence??? hahaha I'll be checking the hoses/gas cap tomorrow, ...again!
07-19-2019 09:20 AM
SlickAl I wouldn’t abandon the gas cap as the culprit unless you purchased the new one from the dealer. I’ve had good luck taking the gasket off the parts store gas cap and putting it on the factory unit.
07-19-2019 09:06 AM
Ken Zinis Mouse, could you send picture of where you found your under hood evap leak please?
01-02-2019 06:03 PM
Ken Zinis Thanks sierrabob
01-02-2019 02:40 PM
Originally Posted by Ken Zinis View Post
Mouse, did you find by eye or did you need to use smoke machine?
I made a paint can smoke machine from a utube example. I was chasing down a check engine light and gave it a try.

I hooked the smoke tube up to the intake after removing a vacuum line that goes to the brake system. I used a 12v air compressor for airing up tires. I did find a small leak and replaced a hose. It didn't change my check engine light problem though.
01-02-2019 09:13 AM
Originally Posted by Ken Zinis View Post
Mouse, did you find by eye or did you need to use smoke machine?
Just by eye - it was very apparent when I found it.
01-01-2019 11:14 AM
Ken Zinis Mouse, did you find by eye or did you need to use smoke machine?
12-31-2018 11:05 AM
Originally Posted by Ken Zinis View Post
Light returned even after new gas cap, any likely suspects I should check for evaporative leak error code? Thanks
Last time my TJ had this code I found a very loose line under the hood, drivers side, next to the intake manifold. Re-setting that connection and adding a clamp fixed it for me.
12-31-2018 09:40 AM
johncanfield All of that evap plumbing is hidden between the plastic wheel liner and the tub at the rear on driver and passenger sides. I pulled the liners out when I was outboarding my shocks and never put them back - makes it easy to access those areas. I would check all of the hoses. It's probably going to be a PITA to check with the wheel well liners in place.
This thread has more than 10 replies. Click here to review the whole thread.

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

For the best viewing experience please update your browser to Google Chrome