Help! I just put in a k&n cold air intake and when I started my car it was idling very low almost stalling out, then it did and I had a check engine light on when I restarted the car. The codes p0102 & p0243 popped up. What could be causing this? I have an 02 Audi A4 Quattro 1.8t. Thanks

 

So I cleared the code p0102 but still have the code p0243 on... I know it's saying turbo wastegate solenoid A. How can I fix this?