Intermittent ABS, Trac and Stab control lights XJR V8

[S6 Devil]

I recently had a new lower wishbone fulcrum bush and bolt fitted to the n/s rear and both floor pans welded in the footwells on my XJR V8. A week or so after, I started getting an Intermittent ABS, Trac and Stab control light coming on. If I stop the car and turn off and on again, it goes after 100 metres of driving. Strangely, over the past few days it has only come on after a drive, when I reverse into my drive. Similarly it has been coming on after doing a 3 point turn. I am wondering if it could be a transmission issue (there are no problems with gear changes)?

I have read that it could be a dirty or faulty wheel speed sensor but surely this wouldn't be intermittent and go off after restartng the car. It could be the ABS module but again, it is intermittent.

My mechanic used a snap on code reader but couldn't find any codes. He suggested getting it read by a Jag reader (autologic)

Any thoughts

[Rovinghawk]

Check the condition of your battery.

[S6 Devil]

I fitted a new battery about 6 months ago.

[Hamish Finn]

Near side rear sensor has been disturbed, even if it was only a bump.

Ignore the inevitable battery problem advice as you've fitted a recent new battery. Clean all the ABS sensors, they will start playing up eventually if you don't.