Jeep bucking and Check Engine light came on with these codes please help - Jeep Wrangler Forum
Jeep Wrangler Forum

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

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 03-04-2010, 09:46 AM   #1
SurfNaked2010's Avatar
Join Date: May 2009
Location: Bayville, New Jersey
Posts: 432
Send a message via AIM to SurfNaked2010
Jeep bucking and Check Engine light came on with these codes please help

so my check engine came on with these codes can someone please explain whey they mean. this is what it says in my FSM but i still dont understand what to look for or what to do thanks.

SYMPTOMS = off the line my jeep bucks and feels like the trans is slipping i have the 32rh. so idk if it the torque converter, bands, or anything else. and when it shifts it sounds like its in neutral for a second or two than engages

P0740 (M)
Scan tool Display = Torq Con Clu, No RPM Drop at Lockup
Brief Description of DTC = Relationship between engine and vehicle speeds indicated failure of torque convertor clutch lock-up system (TCC/PTU solenoid)

P0743 (M)
Scan tool Display = Torque Converter Clutch Solenoid/Trans Relay Circuits
Brief Description of DTC = An open or shorted condition detected in the torque converter clutch (part throttle unlock) solenoid control circuit. Shift solenoid C electrical fault - Aisin transmission

P0743 (M)
Scan tool Display = Torque Converter Clutch Solenoid/Trans Relay Circuits
Brief Description of DTC = An open or shorted condition detected in the torqueconverter part throttle unlock solenoid control circuit (3 or 4-speed auto. trans. only).

W.W.J.D. (What Would Jerry Do???)
SurfNaked2010 is offline   Quote Quick Reply
Old 03-04-2010, 10:51 AM   #2
G-Pur's Avatar
Join Date: Sep 2008
Location: Lowell, MA
Posts: 1,645
Something tells me it may be the Torque Converter Clutch Solenoid. I wish I could help, but I don't even know what that is. Send a PM to Jerry B, I'm sure he knows exactly what to do.

Check us out at

G-Pur is offline   Quote Quick Reply
Old 03-08-2011, 01:04 PM   #3
Join Date: Mar 2011
Posts: 180
the 2-wire plug for the solenoid is on the back of the tranny. you have to remove the pan to change the solenoid. drop the skid plate, siphon the fluid out of the tranny through the dipstick tube or start loosening at one corner and work from there to drain into a pan. remove the filter (might as well replace it while your there anyways and most come with the gasket) and there should be one 10mm bolt holding it in place if memory serves me. its an inexpensive part.
once you are reassembled, disconnect the battery ground for a few to clear the codes then fire it up. be sure to refill the tranny first of course.
randy and teri is offline   Quote Quick Reply
Old 02-09-2012, 01:31 AM   #4
Join Date: Feb 2012
Location: Layton, Utah
Posts: 5
What size of tire and gears are you running? The TCC only engages during cruising at Highway speed. If you have too big of tires with high gears such as stock gearing it puts alot of stress on the TCC. If this is the case the clutches are probably toast, if not its probably your solenoid. If its your solenoid though your clutches are also probably gone due to lack of pressure, causing the clutches to slip. So either way one or both are bad. Have you done a tranny flush lately?
mcjeeper 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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Check Engine Light... Ursine JK General Discussion Forum 13 06-03-2011 07:09 AM
check engine light gth-wrangler97 TJ Tech Forum 4 01-19-2010 10:24 PM
check engine light jeeplover38 TJ Tech Forum 6 01-05-2010 02:36 PM
Check Engine Light - Need More Help Than Other Threads Provide Joshpfeffer TJ Tech Forum 6 04-16-2009 08:25 PM
Check engine light rriverside7 TJ Tech Forum 4 12-13-2005 06:29 PM

Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:44 PM.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC