So just the other day my car started acting weird at idle. it surges between 1000 and 1400 rpms. and while decelerating the car feels like its trying to slow down faster when im off the throttle.

here is a video
its throwing up two codes
P0102 - Mass or Volume Air flow sensor circuit low imput.
P1504 - Intake Air system bypass leak detected.

so what exactly is wrong?

 

https://www.audiforums.com/forum/aud...l-p1504-86624/

 

I've heard a bad throttle body can cause spiking with the rpms