New Beetle L5-2.5L (BPS) (2006)
Oxygen Sensor: Testing and Inspection
Oxygen Sensor Before Catalytic Converter, Checking
Diagnostic Procedures
Oxygen Sensor before Catalytic Converter, Checking
‹› Use only gold-plated terminals when servicing terminals in the electrical harness connector of the Heated Oxygen Sensor (HO2S) (G39 ).
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The Heated Oxygen Sensor (HO2S) (G39) fuse OK.
‹› The Oxygen Sensor (O2S) Heater (Z19) before catalytic converter OK.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› A/C switched off.
‹› Ground connections between engine/transmission/chassis OK.
‹› Exhaust system between catalytic converter and cylinder head properly sealed.
‹› Coolant Temperature at least 80° C.
Test procedure
-
Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check
Start diagnosis
-
Perform the function test in Diagnostic Mode 06.
If specified values are obtained:
-
Check for possible intermittent connection or rub through of harness.
-
Erase the code. Drive the vehicle and generate the readiness code.
If the specified value was Not obtained:
Checking primary voltage
-
Disconnect the Heated Oxygen Sensor (HO2S) (G39 ) electrical harness connector - 1 -.