FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
Courtesy of Operation CHARM: Car repair manuals for everyone.

DTC 16421



SAE VAG Description
P0037 16421 HO2S Heater Control Circuit Low Bank 1 Sensor 2

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