90CS Quattro V6-2.8L (AAH) (1994)
Heated Oxygen Sensor: Testing and Inspection
Heated Oxygen Sensor (H02S) system
NOTE:
For functional testing of the oxygen sensor also see On-Board Diagnostics "Read Measuring Value Block" function 08, display groups 007
and/or 008. See: Testing and Inspection
CAUTION!
DO NOT USE SILICONE SPRAYS, SEALERS, CLEANERS, ETC. near the intake area. Traces of silicone components drawn into the
engine are not burned during combustion and can damage the oxygen sensor,
DO NOT use contact sprays or similar materials in the area of the oxygen sensor connection, since these lead to corrosion damage in the
oxygen sensor,
Checking Oxygen Sensor heating
Connector / Component Locations
-
Disconnect heated oxygen sensor harness connector on right or left cylinder bank.
1A - Right bank
4B - Left bank