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. O2 Sensor and O2 Sensor Control Before TWC
- Wiring Diagram

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. O2 Sensor and O2 Sensor Control Behind TWC
- Wiring Diagram