When U run diagnostic tests and u don't think the computer is responding.
Remove a battery cable. Wate a bit to let the computer clear itself. Then drive for a while and try again.
If still no reply from the computer and everything other then your speed being off is ok.
Check your tires size, r the ones on now different.
This could make a different in your speed.
Hope this helps
Friday, March 13th, 2009 AT 5:32 AM