I have the EPC and Engine light on with a rough Idle. This rough Idle could just be its “Limp Mode” but not sure. Connecting to a Generic Scanner gives codes of:

P0506 (Idle Air Control System Revolution Lower)

P0300 (Random – Multiple Misfire)

P0301 (Cylinder 1 Misfire)

P0302 (Cylinder 2 Misfire).



I have changed the Spark Plugs and all 4 Coil Packs. When I changed the spark plugs alone, it started good for about 2 Minutes and then went back to its Limp Mode. I do see the Breather Hose (06H133583B – Audi OEM Part Number) is cracked and if its broken might be sending an error code saying the air is not good and causing the issue but not willing to spend $70 on a cable to just check.



Any Advice would be great! Thank you so much in advance!