P1103

SAE VAG Description
P1103 17511 O2 Sensor Heating Circ., Bank 1 - Sensor 1 Output too Low

Z19 - Oxygen Sensor (O2S) Heater
Z28 - Oxygen Sensor (O2S) Heater 2

- Oxygen sensor heater for oxygen sensor before Three Way Catalytic Converter (TWC) checking. Oxygen Sensor Heater For Oxygen Sensor Before Three Way Catalytic Converter (TWC) Checking