Oxygen Sensor: Service and Repair

Primary HO2S Replacement

Special Tools Required
Commercially available O(2) sensor wrench:
Snap-on YA8875, SP Tools 93750, or equivalent

Primary HO2S Replacement:

1. Disconnect the primary HO2S 4P connector (A), then remove the primary HO2S (B)
2. Install the primary HO2S in the reverse order of removal.

Secondary HO2S Replacement

Special Tools Required
Commercially available O(2) sensor wrench:
Snap-on YA8875, SP Tools 93750, or equivalent

Secondary HO2S Replacement:

1. Disconnect the secondary HO2S 4P connector (A), then remove the secondary HO2S (B).
2. Install the secondary HO2S in the reverse order of removal.