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

Oxygen Sensor: Testing and Inspection

Fig. 14 Oxygen sensor connector terminals:





1. Disconnect sensor electrical connector.
2. Using suitable ohmmeter, check resistance between connector terminals A and B, Fig. 14.
3. Resistance should be 5-7 ohms.
4. If resistance is not as specified, replace sensor.