Diagnosis Of BOSCH Heated Oxygen Sensors (Ho2S)
WARNING: This page is about a different variant/trim than selected.
A full description of oxygen sensor monitoring, can be found in the service information Documents Tab/Diagnostics Section/OBD II System Information
CAUTION:
Diagnosis by substitution from a donor vehicle is NOT
acceptable. Substitution of control modules does not guarantee confirmation of a fault and may also cause additional faults in the vehicle being checked and/or the donor vehicle
NOTE:
Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests
The purpose of this document is to aid in the correct diagnosis of Bosch Heated Oxygen Sensors (HO2S) and to prevent unnecessary installation of new parts. It may be deemed after diagnosis that a particular sensor has failed, in this case it would be expected that only the failed sensor is replaced and NOT a complete vehicle set.