P0121 – Throttle Position Sensor 1 Performance 99 Jeep Wrangler - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > General Jeep Discussions > General Jeep Discussion

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 11-11-2011, 08:04 PM   #1
Join Date: Nov 2011
Posts: 2
P0121 – Throttle Position Sensor 1 Performance 99 Jeep Wrangler

Hey Anyone who can help,
Had check engine come on while driving on highway, shortly afterward felt a lurch while climbing hill in 5th gear. Event has been associated with an odd smell. Got the diagnostic code
P0121 - Throttle Position Sensor/Switch A Circuit Range/Performance Problem. I own a 99 Jeep Wrangler Sport, 4.0 L manual. Thanks for any info.

PlunderBlunder is offline   Quote
Old 11-18-2011, 03:21 PM   #2
Join Date: Oct 2010
Posts: 21
First make sure there is a good connection at the throttle position sensor (no mud/dirt/water). Clean the connection and plug the sensor back in. If it continues it is most likely the sensor itself that needs replaced. They aren't very expensive. Maybe 30 bucks or so. Very easy to change yourself.

Markr is offline   Quote
Old 11-18-2011, 03:49 PM   #3
killroy3's Avatar
Join Date: Nov 2011
Location: sheboygan wi
Posts: 649
I got mine at autozone for like under $10.00 bucks
killroy3 is offline   Quote
Old 11-20-2011, 02:42 PM   #4
Join Date: Nov 2011
Posts: 2
Thanks for ideas, will give them a try.
PlunderBlunder is offline   Quote
Old 11-20-2011, 04:00 PM   #5

WF Supporting Member
6InARowMakesItGo's Avatar
Join Date: Aug 2010
Location: right behind you
Posts: 1,863
i had the same code. cleaned it which helped for a week then it did it some more. new one fixed the problem.
2003 Rubicon, 4.0L, 5SPD, Custom 4.75" lift, 33" MT Baja Claws
1999 SE, 2.5L, 5SPD, sold it
PM me for wheeling in and around Northern Illinois
6InARowMakesItGo is offline   Quote
Old 12-31-2014, 07:12 PM   #6
Join Date: Jan 2014
Location: Nebraska
Posts: 2
Where is the tps on a 99 2.5 L? Pics

99sahara99 is offline   Quote

tps sensor

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
rebuilding your engine?? Get Stroked!!! jeeper95yj YJ General Discussion Forum 6 01-01-2014 05:47 PM
The History Of The Jeep Wrangler BigKahunaBurger Off-Topic 6 09-02-2011 06:12 PM
Biggest Jeep Freek Contest!!!! txoutdoorx4 Classifieds Archive 6 02-21-2011 11:48 AM
Runaway Off Topic Thread amerijeep Off-Topic 2723 01-30-2011 08:19 PM

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 05:42 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2015 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