On my way on vacation my check engine light on my 2004 audi A4 came on. Luckily I had my OBD II tester that I payed 400 dollars for with me. I tried it and it wont work on the Audi. Ive used it on multiple cars(10+) and tried the tester on 2 cars since it wouldnt work on the Audi and it works fine. Do Audis not work with OBD II testers if there not from Audi or something? what does a Check engine light usually represent?

On a side not I have never in my life owned a car that has had so many problems especially in so little time. I have had the car for a little over a year and 45 minutes after I had the car the motor & the turbo blew due to oil sludge? I have replaced multiple headlamp and tail lamp lights repeatedly and the paint on the interior is chipping away everywhere and I dont use chemicals on it. Any suggestions?

 

Oh yea and its completly stock

 

I have a $100 Harbor Frieght OBD II code reader with CAN and english descriptions of all the codes and it works just fine on our '03 A4.

 

What is CAN?

 

CAN stands for Control Area Network. It's the nextlevel beyond the older OBD II.

 

you should try takeing it to like auto zone and that way you will see if it is your obd2 scanner