P0172

SAE VAG Description
P0172 16556 System Too Rich Bank 1

Evaporative Emission (EVAP) Canister Purge Regulator Valve
- Evaporative Emission (EVAP) canister purge regulator valve, checking. EVAP Canister Purge Regulator Valve Checking

Fuel injectors
- Fuel injectors, checking. Fuel Injectors, Checking

Fuel pressure regulator and residual pressure
- Fuel pressure regulator and residual pressure, checking. Fuel Pressure Regulator and Residual Pressure, Checking

Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC)
- Oxygen Sensor (O2S) and oxygen sensor control before Three Way Catalytic Converter (TWC), checking. Oxygen Sensor (O2S) and Oxygen Sensor Control Before Three Way Catalytic Converter (TWC), Checking

Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC)
- Oxygen Sensor (O2S) and oxygen sensor control behind Three Way Catalytic Converter (TWC), checking. Oxygen Sensor and Oxygen Sensor Control Behind Three Way Catalytic Converter (TWC), Checking