With Generic Scan Tool

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

Z19 - Oxygen Sensor (O2S) Heater
- Oxygen Sensor (O2S) Heater -Z19- before catalytic converter, checking. Oxygen Sensor (O2S) Heater -Z19- Before Catalytic Converter, Checking