HI, how is every One? I have a 2000 XK8 Convertible with 67888 miles on it. I keep Seeing a mess. or code of ASC Not Available and right after the mess.I see Trac not available mess. What do I look for, or can any one tell me where to look and what the messages mean? thanks for any Help BR549

 

read about cleaning the electrical plug ins on the throttle body. Clean both with electrical contact cleaner and reassemble. Should clear problem

 

If you see these messages right a startup after the car has been sitting a while (overnight), it is a sign of an aging battery not able to maintain the required voltage during cranking.

 

^^ What he said. These are some of the usual signs of a failing battery....

 

^^ What they said about replacing battery - plus clean the wheel speed sensors. Plenty of info on here about how to do it.

 

+1 on the sensors, especially if it happens while driving and resets each ignition cycle.

BTW do you see ASC not available or ABS not available? If I remember correctly dirty sensor always lights both. I can't imaging how you could have one not the other if its a common component like the wheel speed sensor.

ABS will stay after ignition cycle until you drive forward a very short distance at something like 15mph, then it clears until the dirty sensor causes same cycle.

John