??????????
well newer a4's have a button to turn it on and off. older a4s its always on. i forget what epc stands for but mine would come on if i went on and off boost quickly with a heavy load on the motor. ie going up a mountian pass at 85 in 5th gear. if igot off boost then back on sometimes that light would come on.
but say ESP will have nothing to do with my car gettin chipped, i kno when i got my car chipped i checked it had ESP by mistake, that wont effect the power of my chip if i actully dont have ESP?


