A/F Sensor Replacement
Special Tools Required
O2 sensor wrench, Snap-on YA8875, SP Tools 93750, or equivalent, commercially available
Scheme 677
- Disconnect the A/F sensor 4P connector (A), then remove the A/F sensor (B).
- Install the A/F sensor in the reverse order of removal.
Secondary HO2S Replacement
Special Tools Required
O2 sensor wrench, Snap-on YA8875, SP Tools 93750, or equivalent, commercially available
Note. When the Secondary HO2S is replaced. The third HO2S must be replaced at the same time to keep their performance matched (see Third HO2S Replacement ).
Scheme 678
Scheme 679
- Disconnect the secondary HO2S 4P connector (A), then remove the secondary HO2S (B).
- Install the secondary HO2S in the reverse order of removal.
Third HO2S Replacement
Special Tools Required
- O2 sensor wrench, Snap-on YA8875, SP Tools 93750, or equivalent, commercially available