P0172

SAE VAG Description
P0172 16556 System Too Rich Bank 1

Fuel Trim - System Too Rich
- EVAP canister system checking for proper seal EVAP Canister System, Checking For Proper Seal
- Fuel injectors checking Fuel Injectors, Checking
- Heated Oxygen Sensor (HO2S) -G39- and oxygen sensor regulation before catalytic converter checking Heated Oxygen Sensor (HO2S) -G39- and Oxygen Sensor Regulation Before Catalytic Converter, Checking
- Oxygen sensors and oxygen sensor regulation behind catalytic converter checking Oxygen Sensors and Oxygen Sensor Regulation Behind Catalytic Converter, Checking
- System pressure and residual pressure checking Fuel System Pressure and Residual Pressure, Checking