O2 Sensor Leak and Rev Issue 2001 TJ 4.0L - JeepForum.com
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Engines & Drivetrain > O2 Sensor Leak and Rev Issue 2001 TJ 4.0L

Ruffstuff 10 year saleBDS 4-1/2" Suspension Lift Kit - Jeep Wrangler YJRough Country Lift Kits and Parts!

Unread 08-21-2013, 09:46 AM   #1
Registered User
2001 TJ Wrangler 
Join Date: Apr 2013
Location: Berlin, Wi
Posts: 4
O2 Sensor Leak and Rev Issue 2001 TJ 4.0L

My check engine light just came on with an efficiency code for my catalytic converter. The same day I also decided to put some seafoam through the engine and I noticed a leak on one of the O2 sensors coming off the manifold. Some other symptoms have been that when I'm between 1900 and 2400 RPM the engine has a chug too it (usually more on highway speeds). Also, when I will rev it up to about 2500 RPM and let off the gas, the RPM's fall so low the engine sometimes dies. Initially I thought it was the TPS sensor so I replaced that but it's only helped a little bit. Could this all be a result from that O2 sensor where I noticed the leak?


chiefkeeper92 is offline   Reply With Quote Quick reply to this message
Unread 08-21-2013, 09:53 PM   #2
Registered User
1992 XJ Cherokee 
Join Date: Oct 2012
Location: umatilla, florida
Posts: 1,961
It could be that. 2 major sensors control everything. 02 & cps
uberxj92 is offline   Reply With Quote Quick reply to this message

catalytic converter , oxygen sensor , throttle position sensor

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com 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 e-mail 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

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.