Check Engine Light - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 04-17-2009, 01:50 PM   #1
Join Date: Mar 2009
Location: Barksdale AFB, LA
Posts: 5
Check Engine Light

I have a 2001 Jeep Wrangler Sahara. The check engine light came on today. I took it to Auto Zone and the code for the problem is P0455 (Evap large leak detected). This is probably a loose fuel cap. Does anyone else have any insight on this. Thanks for the help.
sparkn1855 is offline   Quote
Old 04-17-2009, 01:57 PM   #2
Knows a couple things...

WF Supporting Member
Jerry Bransford's Avatar
Join Date: Nov 2005
Location: Escondido, Calif.
Posts: 41,251
You are probably correct that it is fuel cap related. Was the fuel cap ever off when the engine was running or not screwed down tightly after you filled up? Either will cause that diagnostic code.

By the way, you can display your own diagnostic codes without the need to go to Autozone. Simply turn your ignition key on-off-on three times within five seconds (not to the Start position) and then leave the ignition switch in the final on position. After several seconds, have patience, any stored codes will start showing up in your odometer.

When you have a choice, buy American.
Jerry Bransford is offline   Quote
Old 04-17-2009, 02:43 PM   #3
meyers's Avatar
Join Date: Apr 2009
Location: Dover, New Hampshire
Posts: 738
Had this happen on my 02 Wrangler. After I replaced mine, the check engine light stayed on so I disconnected the battery cable one night and the next morning the light was off and hasn't come back on.
meyers is offline   Quote
Old 04-17-2009, 11:37 PM   #4
01 TJ's Avatar
Join Date: Jan 2009
Location: Trussville, AL
Posts: 111
I also have a 2001 Sahara and the check engine light goes on and off at different times with the same code you posted. I have replaced the fuel cap with a new OEM part and the problem still persists. No worries though. If you notice the Jeep runnig rough or getting even worse gas mileage than normal then I would get it checked out. Mine hase been going on and off for two years and it still runs fine.
Hold my beer! Buuurp!
01 TJ is offline   Quote
Old 04-18-2009, 09:32 AM   #5
Join Date: Mar 2009
Location: Barksdale AFB, LA
Posts: 5
Thanks for the help guys!
sparkn1855 is offline   Quote
Old 05-08-2009, 12:32 AM   #6
Join Date: Jul 2008
Posts: 24
Just happen in my silverado parts. First thing is check your gas cap and make sure it's tight. If it is and then light stays on you need to follow the line ( the smallest of the 3 lines coming out of the tank) to the engine and check for cracks in it or any possible leaks in it. You should have a diagram under the hood of the car. It should say EVAP System.

BALLARDAdams 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 gamecock22 TJ General Discussion Forum 23 10-08-2015 07:02 PM
Check Engine Light - Need More Help Than Other Threads Provide Joshpfeffer TJ Tech Forum 6 04-16-2009 07:25 PM
Check Engine Light vin211 TJ Tech Forum 4 04-07-2008 09:12 AM
Idling strange = check engine light? Rubigoddess TJ Tech Forum 6 03-01-2008 12:38 PM
Check engine light 94redwrangler YJ Tech Forum 2 12-19-2007 03:48 PM

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 09:13 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2016 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