Today I was on the highway and let off gas and then got on it hard.
There was a thunk from rear of car and esp light turnd on.
When I shut off the car and then restarted it the check engion light also turnd on.
eney ideas of what the problem may be?
The car is a audi 02 a4 tip with revo flash and koni adj coil overs.

 

Do you have a vag-com?? If not go get your car scanned at autozone.

 

no I dont.
the car is under warranty but in the book it states that altering suspention will void all warrantys.

 

well do you have an Autozone nearby? Ya gotta figure out the code before I can help.

 

yah I will go monday after work

 

my god damn esp also shut off everynow and then and will only turn back on after i shut the car off. i dun get it. it only started after i added a CAI.