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)

Or, hide this message: temporarily or permanently

Downstream

1. Raise and support vehicle.

Oxygen Sensor:





2. Disconnect the downstream Heated Oxygen Sensor (HO2S) electrical connector.
3. Use Oxygen Sensor Wrench T94P-9472-A, or equivalent, to remove the downstream HO2S from the inlet pipe.
4. Reverse procedure to install.