Beetle L4-2.0L (AEG) (2000)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor Heater For O2 Sensor Before TWC, Checking
With Generic Scan Tool
Oxygen Sensor Heater For Oxygen Sensor Before Three Way Catalytic Converter (TWC), Checking
Vehicle must be raised before connector for oxygen sensor is accessible.
When servicing terminals in harness connector of Heated Oxygen Sensor (HO2S), use only gold-plated terminals.
Recommended special tools and equipment
VAG 1526 multimeter or VAG 1715 multimeter
VAG 1594 connector test kit
The respective fuses of Heated Oxygen Sensor (HO2S) -G39- must be OK.
Ignition switched off.
Test sequence (Vehicles with engine code AEG)
Unscrew protective cover (arrows) and disconnect 4-pin harness connector (black) -1- to Heated Oxygen Sensor (HO2S) -G39- before catalytic