P2A04 — Audi — Exhaust leak, Oxygen sensor failure, Powertrain Control Module (PCM) failure, Wiring issue

P2A04 (Audi): Exhaust leak, Oxygen sensor failure, Powertrain Control Module (PC… — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Exhaust leak, Oxygen sensor failure, Powertrain Control Module (PCM) failure, Wiring issue. Source catalogue definition; confirm applicability using vehicle service information.

Affected system: Powertrain