Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Oxygen Sensor: Service and Repair

HO2S

Replacement

Primary HO2S:




1. Disconnect the primary HO2S connector, then remove the cover.




2. Remove the primary HO2S.
3. Install the primary HO2S in reverse order of removal.

Secondary HO2S:




1. Disconnect the secondary HO2S connector, then remove the secondary HO2S.
2. Install the secondary HO2S in reverse order of removal.