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!

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Oxygen Sensor: Service and Repair


1. Disconnect battery ground cable.
2. With engine temperature above 120°F disconnect electrical connector and remove sensor.
3. Reverse procedure to install. Coat oxygen sensor threads with a suitable anti-seize compound and torque sensor to 30 ft. lbs.