P0174 (Audi): PCM software needs to be updated, Vacuum leaks (Intake Manifold Ga… — what it means, the affected system and what to check before replacing parts.
PCM software needs to be updated, Vacuum leaks (Intake Manifold Gaskets, vacuum hoses, PCV hoses, etc.), Faulty Mass Airflow (MAF) Sensor, Plugged Fuel Filter or weak Fuel Pump, Plugged or dirty Fuel Injectors. Source catalogue definition; confirm applicability using vehicle service information.
Affected system: Powertrain