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)
- 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