Go Back   Jaguar Forums - Jaguar Enthusiasts Forum > Jaguar Models ( Modern ) > XK8 / XKR
Sign in using an external account
Register Forgot Password?

XK8 / XKR 1996 - 2006
Sponsored by SNG Barratt
Click Here

Welcome to Jaguar Forums!
Welcome to JaguarForums.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the Jaguar Forums community today!

LinkBack Thread Tools Search this Thread
Old 12-27-2008, 07:41 AM
Posts: n/a
Default Fault code P1793 (gearbox fault)

Hi Can anyone help. We have a problem with our XK8. The dash comes up with a fault saying" gearbox fault " and something like "traction control error" and"......

We had the fault checked by local garage which showed a fault code P1793.

Does anyone have a similar problem and know what the problem might be and resolution.

It has been sugested it might be corrosion on the pins somewhere.

Would be grateful of any input.

Thanks , Nigel
Reply With Quote
Old 12-27-2008, 01:19 PM
2000blackxkr's Avatar
Senior Member
Join Date: Aug 2007
Location: Battle Ground Washington
Posts: 258
Thanked 23 Times in 9 Posts
Default RE: Fault code P1793 (gearbox fault)


This is what i found in my pdf diagnostic info for that code.

System Voltage – P1793, P1798
A permanent supply is used to maintain a battery backed 'memory'. Should this supply be cut, due to battery disconnection perhaps, the 'adaptive shift' values will be lost. This will result in a small reduction in shift quality for a period until the adaptions are 're-learned'.
The TCM monitors the supply voltage and will log a Diagnostic Trouble Code (DTC) if the voltage is not between 7 and 16V for more than 300 ms whilst the engine speed is greater than 1600 rpm. This fault is unlikely to be caused by a failure within the TCM and as such the vehicle harness and fuses etc. should be checked before the TCM is condemned.

I dont know what year your car is, but that applys to "ZF 5HP24" XK8 4.0 L N/A 1997 to 2002 model year

good luck. keep us posted on your repair.
My baby... God i love that sound...

PLEASE NOTE: This exhaust was NOT made by Nameless Performance. Only the High Flow cats were made by Nameless Performance. My exhaust is vary aggressive. I like it that way. That does not necessarily dictate what the cats it will sound like on your car.
Reply With Quote
Old 12-27-2008, 01:19 PM

1997, 2000, 5hp24, battery, code, codes, description, dtc, due, falt, fault, gearbox, jaguar, p1793, p1798, transmission, xj8, xk8

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 On
Pingbacks are On
Refbacks are On


Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -5. The time now is 02:40 PM.

Copyright © 2010 Internet Brands, Inc. All rights reserved.

Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2015 vBulletin Solutions, Inc. All rights reserved.
JAGUAR and its logo are the registered trademarks of Jaguar Cars Limited. Jaguar Cars Limited is not affiliated with JaguarForums.com.