After about an hr of driving the engine went into safe mode and flashed two warnings. ASC not available and Traction control not working. I shut off and restarted and all was fine. After an hour same thing again. This got more frequent, by the time I got home it was almost a permanent condition. Any ideas from anyone would be great.

 

Interesting. How old is your battery? A lot of time weak batteries cause problems in these cars.

 

Weak battery would not cause a fault while the engine was running.
You'll need to pull codes to get more info... a local AutoZone will do it for free..

Vince

 

Question - is this concerning your 1995 XJ or is this a problem with your 2007+ MY XK/R?

If this is a problem with your 1995 XJ, the issue is most likely with the magnetic pickups that "sense" the rotation of your axles/wheels. They get very dirty sometimes and have to be cleaned. Another possibility is with the ASC control unit in the engine bay; they were known to have isues and have to be rebuilt or replaced.

If this is an issue with a 2007+ MY XK/R, Since this is occurring so intermittently/frequently I would suspect the control unit. But, the only way to tell for certain is to have the system diagnosed either at a dealer or an independent shop that has the proper equipment.

 

0121 seems to be the code of trouble. After clearing codes and wiggling all connections I think we have fixed the problem. Second of all, Sorry guys this should have been in the XK8 section as this is occurring with my 2000 XK8 convertable

 

Clever,
I actually had those two warnings come in on my 07 while driving. It would put it in limp mode. I would stop and restart and all would be well. It would also say Cruise Not Available. I got tired of the crap and put a new battery in it. Fixed everything. Even runs different. And it corrected the delay I was having with the start button.

 

I hope it stays fixed. But I think it sounds like wishful thinking. If you continue to have more trouble, try replacing the battery with an AGM battery.