Fault Codes List — Audi Q5

But the Q5’s soul isn’t just the engine. It’s the quiet systems.

The most heartbreaking? – Catalyst System Efficiency Below Threshold . audi q5 fault codes list

I plugged in my scanner. – Turbocharger Underboost . But the Q5’s soul isn’t just the engine

“Ah,” my mechanic said later, wiping his hands. “That’s the ‘I want to go fast but can’t’ code. On a Q5, it’s almost always a torn diverter valve or a leaky wastegate. Your Audi is wheezing like an old marathon runner.” ” my mechanic said later