P 0456 - Jeep Wrangler Forum

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

Join Wrangler Forum Today



Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-27-2013, 08:26 PM
Thread Starter
  #1
Newb
 
Join Date: Mar 2013
Posts: 3
Klong is on a distinguished road
P 0456

I have a check engine light that shows code p 0456. Small leak in evap system. I have already replaced the gas cap. Anyone have an idea where I should start looking next?
Klong is offline   Quote
Old 03-27-2013, 08:32 PM   #2
Jeeper
 
Join Date: Feb 2013
Posts: 39
TCogley is on a distinguished road
without proper tools its tough...could be leaking from a vent control valve, or the evap system itself. without being able to pressurize the system its tough to diagnose

TCogley is offline   Quote
Old 03-27-2013, 08:35 PM   #3
Jeeper
 
Join Date: Jun 2012
Posts: 458
amiller is on a distinguished road
That is one of those codes that is stupid in my mind and nearly impossible to chase. I hope your state doesnt have emissions testing. I have heard of people selling their vehicles because they gave up on chasing that code. As much as I hate saying it, I would take it to the stealership and have them do the diagonsis. Edit. Did you check to make sure when you changed your gas cap that there is no corrosion or rust built up on the sealing surface at the filler?
amiller is offline   Quote
 
Old 03-27-2013, 09:07 PM   #4
Jeeper
 
tkfx's Avatar
 
Join Date: Aug 2012
Location: La Crescenta, CA
Posts: 1,806
tkfx is on a distinguished road
After you change the gas cap it takes about 3 full trips before the computer can determine that the leak is gone. If the code doesnt disappear after a couple trips on its own then it wont be the gas cap. Maybe a EVAP hose ruptured/cracked and has a small leak? Best way to find it is a smoke test, a mechanic with the machine or the stealership should be able to diagnose it.

I had the same problem until I changed the gas cap!
tkfx is offline   Quote
Reply

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





All times are GMT -5. The time now is 03:06 AM.


User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

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
« Back

Enter your email address:

Delivered by FeedBurner