97 TJ O2 sensor problem - Jeep Wrangler Forum
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 WranglerForum.com
Old 11-28-2007, 09:02 PM   #1
Join Date: Sep 2007
Location: texas
Posts: 6
97 TJ O2 sensor problem

Hey ya'll,

Devils back in the TJ. I replaced the upper O2 sensor end of Sept. That solved my hitchin and bucking prob that occurred about 45 seconds after start. The symptoms for that bad sensor escalated to the point where the volt regulator needle would drop to zero, a beep would sound, and the check engine light would come on. I replaced the O2 sensor with a bosch from autozone, and all was well.

Well, the devil hitched a ride with me again, starting yesterday. She's doing the same thing. Start her up, she'll idle all day, but when I apply a load, then immediately "Beep, needle goes to zero, CEL comes on" and she hitches a bit. Fuel mileage is in the crapper, and the battery is dead.

I'm wondering about the durability of these Bosch upper O2 sensors. Could it be possible that the sensor is bad after 2 months? Or do I need to replace the rear after Cat O2 sensor? The rest of the jeep is fine. Up to tweo days ago all was well.

I'd replace the rear sensor, but on USAF pay (even nowadaze) if I don't need to I'd rather not.

Thanks for your expertise.

HarryJeeper61 is offline   Quote Quick Reply
Old 11-29-2007, 04:07 PM   #2
TXST8tj's Avatar
Join Date: Jan 2007
Location: Katy, TX
Posts: 1,942
Send a message via AIM to TXST8tj
how much did the upper sensor run you? i need to replace my lower O2. i also need to replace the whole manifold so i wonder if i did the O2 first, if it would have issues again from something up the line from it.

- Patrick
TXST8tj is offline   Quote Quick Reply
Old 11-30-2007, 06:29 AM   #3
NY94YJ's Avatar
Join Date: May 2005
Location: Malta NY
Posts: 307
Recently replaced my O2 sensr in my YJ, I did not have as bad of symptoms, but none the less they went away only to return a week later......... I crawled under tightened the O2 Sensor and All is Well again.

Must have not got it tight the 1st time, or like most things it's always good to go back a re-tighten.

Good luck.
'03 TJ Sport on 33's, 2"BB, 1"BL, 1"MML
NY94YJ is offline   Quote Quick Reply

Quick Reply

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.

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

Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:34 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