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

1. Disconnect connector and remove sensor from manifold.
2. Clean threads in manifold,
3. Coat replacement sensor threads with anti-seize compound.
4. Install sensor and torque to 20-25 ft, lbs.

CAUTION: Make sure that wire terminal ends are properly seated in plug before connecting plug.

5. Connect connector. Do not push rubber boot down on sensor more than 1/2 inch above base.

NOTE: Oxygen sensor pigtail wires cannot be spliced or soldered. If broken, replace sensor.