Audi Q5 Fault Codes List [updated] -

These codes are the most frequent complaints among Q5 owners, spanning the 2.0 TFSI (EA888) and 3.0 TFSI (Supercharged V6) engines.

That’s the “your expensive catalytic converter is dying” code. On a Q5, often from ignored misfires or a leaking fuel injector. Cost? A few thousand. I learned: never ignore P0300 when it’s small, or it grows into P0420. audi q5 fault codes list