Hello I havent been on the forum in a few months.
I have a XJR 03
And for the last 6 months have been having issues with
Restricted performance and ABS.
I even got a new transmission put in. My engine light also would not go off.
Still doing it after even spending the money and getting a new transmission.

Any suggestions

I have had this car about 5 years
and my mechanic is at a dead end
we cant seem to get the engine light off
we will get it to go off for a few hours then it comes back on
along with restricted performance

 

There will be DTCs in all the modules on the CAN bus. (Except the Selector Lever Illumination Module)

The ECM will have P (Powertrain) codes and the ABS will have C (Chassis) codes.
Please post the codes for a better understanding of the problem.
There will also be a list of Monitoring Conditions and Possible CAUSES.

 

I've moved your post from the end of a 7 year old thread in General Tech Help to X308 forum. This is the place to post questions aboiut your model.

Graham

 

What are the codes ? It might be fuel pump - knock sensor- and other things