DTC 16804

SAE VAG Description
P0420 16804 Catalyst System Efficiency Below Threshold Bank 1

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

- Three Way Catalytic Converter (TWC) checking. Three Way Catalytic Converter (TWC), Checking