check engine light flashes - Jeep Wrangler Forum

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

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 09-23-2011, 05:09 PM   #1
jeep2002wrangler's Avatar
Join Date: Sep 2011
Posts: 8
check engine light flashes

New here, but have already received a wealth of knowledge by just lurking. Have not found an answer to the following, however:
2002 wrangler, 4.0 auto.
The check engine light will flash three or four times, then it will stay unlit for a couple of weeks. Then, it may do it again. Have found no codes via the odometer check.

Any suggestions? Thanks in advance.

jeep2002wrangler is offline   Quote
Old 09-23-2011, 08:24 PM   #2
jasonduke5's Avatar
Join Date: Sep 2011
Location: Williamsport P>A
Posts: 435
did you hook it to a OBD2 reader to see what codes it is throwing. If you dont have one go to your local autozone and they will hook it up for you

jasonduke5 is offline   Quote
Old 09-23-2011, 08:29 PM   #3
Lando25's Avatar
Join Date: Feb 2011
Location: Southern Minnesota
Posts: 1,412
You can always disconnect your battery over night to clear your codes and if it continues to flash then go to a parts store to have them read it
sic vis pacem para bellum
Lando25 is offline   Quote
Old 09-23-2011, 09:44 PM   #4
Join Date: Sep 2011
Location: Rockingham, NC
Posts: 114
If it isnt an electrical gremlin, the check engine light only flashes for one reason..Something is damaging the catalytic converter..which usually means a misfire..I would check you plugs first and go from there..
felix225 is offline   Quote
Old 09-24-2011, 06:35 AM   #5
jeep2002wrangler's Avatar
Join Date: Sep 2011
Posts: 8
thanks all for the advice. The local autozone will be visited this morning, hopefully with some insight.
jeep2002wrangler is offline   Quote
Old 09-24-2011, 07:25 AM   #6
Neil F.'s Avatar
Join Date: Nov 2007
Location: Marlton, NJ
Posts: 6,521
You can read the codes yourself. Turn the key from OFF-ON-OFF-ON-OFF-ON and the codes will display in the odometer window.
2003 TJ, 33" BFG AT, 2" BL, 2" BDS spring lift, Truck Lite headlights, Homemade sunrider top.
Neil F. is offline   Quote
Old 09-24-2011, 08:04 AM   #7
jeep2002wrangler's Avatar
Join Date: Sep 2011
Posts: 8
I did that, and no codes show. Hence, the confusion. I am thinking along the lines of a loose connection on a sensor somewhere.

jeep2002wrangler is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not 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
check engine light tbowden91 YJ Tech Forum 30 04-05-2015 03:50 PM
Check engine light ruining my life DangerousJordan YJ Tech Forum 24 06-18-2011 02:24 PM
Decoding Check Engine Light Gumpy2030 TJ General Discussion Forum 17 03-09-2011 10:46 PM
Check engine light the old guy TJ Tech Forum 3 11-25-2010 02:41 PM
Check Engine Light vin211 TJ Tech Forum 4 04-07-2008 09:12 AM

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 11:23 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 DragonByte Technologies Ltd.

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