error code 21 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ 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 01-24-2011, 09:42 PM   #1
Jeeper
 
60mg's Avatar
 
Join Date: Sep 2010
Location: Midwest
Posts: 845
Images: 18
error code 21

Oxygen sensor related. what are the chances it is connections issue it pops after some time of driving, lately rather quicker than normal and highway quicker than on the streets. It starts up fine, works for a while and then comes on. Disappears after restart till next time and it keeps on going like that. No idling issues, accelerates fine, I guess other than the light nothing is out of the ordinary . Any thoughts?

__________________
95 YJ Rio Grande 2.5L 5-speed (We're at point "A". Where is point "B"? Who gives a sh..!? )
02 Triumph Sprint RS 955i (speed junky)
04 Honda Odyssey EX (parent-mobile)
60mg is offline   Quote Quick Reply
Old 01-24-2011, 09:54 PM   #2
Jeeper
 
Join Date: Jan 2010
Location: Las Cruces, NM
Posts: 2,291
How many miles on it, they're only good for so many, 80K i think

__________________
2013 WRANGLER SPORT 2 DR., V-6 ,AUTO,HARD TOP
(Sold)1994 Jeep Wrangler 2.5L, Bestop top
/w steel half door and slider windows
5 speed, 2.5" lift, 31" tires,rack lights
Garyk is offline   Quote Quick Reply
Old 01-24-2011, 09:56 PM   #3
Jeeper
 
60mg's Avatar
 
Join Date: Sep 2010
Location: Midwest
Posts: 845
Images: 18
That sort of explains it - 170K
__________________
95 YJ Rio Grande 2.5L 5-speed (We're at point "A". Where is point "B"? Who gives a sh..!? )
02 Triumph Sprint RS 955i (speed junky)
04 Honda Odyssey EX (parent-mobile)
60mg is offline   Quote Quick Reply
Old 11-07-2012, 03:35 PM   #4
Newb
 
Join Date: Jul 2012
Posts: 2
sounds familiar

I'm experiencing the same exact thing in my 95 wrangler...

Very intermittent trouble code 21... Last time I reset the codes, it roll 163 miles for the good to return...

Did replacing the O2 sensor resolve your issue?

I've heard code 21 can be falsely caused by a number of things...

Before I buy a new sensor, I'd like to pinpoint the problem...

Thanks
orfedj is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

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.



« 92 YJ Fun! | Shocks »
Thread Tools

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off




» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 06:05 PM.



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