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 1, checking Evaporative Emission (EVAP) Canister Purge Regulator 1, Checking

Evaporative Emission (EVAP) Canister Purge Solenoid Valve
- Evaporative Emission (EVAP) canister purge regulator valve 2, checking Evaporative Emission (EVAP) Canister Purge Regulator 2, 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 and oxygen sensor control before catalytic converter
- Oxygen sensor and oxygen sensor regulation before catalytic converter, checking Oxygen Sensor and Sensor Regulation Before Catalyst, Checking