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Third HO2S Replacement

Third HO2S Replacement

Special Tools Required
O2 sensor wrench. Snap-on YA8875, SP Tools 93750, or equivalent, commercially available

Except AT-PZEV (SULEV) model

NOTE: When the third HO2S is replaced, the secondary HO2S must be replaced at the same time to keep their performance matched.

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