Jeep Wrangler Forum - Reply to Topic
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum > check engine light, tied to 4WD use?

Join Wrangler Forum Today

Thread: check engine light, tied to 4WD use? Reply to Thread
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 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:
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:


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.

Additional Options
Miscellaneous Options

Topic Review (Newest First)
08-09-2008 01:54 PM
frankfletez Thanks. The possible causes you describe, are those easy fixes?
The question has to do with the fact that I keep my trusty '93 YJ in Mexico for when I am there: although there are competent mechanics there they don't necessarily have access to the wealth of information we have here at home.

Have a great weekend
08-07-2008 08:00 PM
18derrick My guess is that you have a vacuum leak or the vacuum switch in the transfer case is doing something funky. All of your 4wd is operated by vacuum except the one switch that turns the light on and off.
08-05-2008 05:16 PM
check engine light, tied to 4WD use?

Greetings eveyone, I'd appreciate advice on the following:
Most times after I engage/disengage from 4WD the 'Check Engine' light comes on and the car hesitates, mis-fires (as if the timing were off or the gas were dirty). By accident I found that turning off the engine and re-starting it most time solves the problem -as the engine seems to go back to normal and the pesky light goes off.
How do I solve the above for good?


Frank Fletez
4-cyl 1993 YJ, 132K

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

All times are GMT -5. The time now is 07:30 AM.

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