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: Testing and Inspection

Oxygen Sensor Inspection:





1. Start engine and allow it to reach normal operating temperature.
2. Connect DVOM to data link connector as shown.
3. Perform the following test.

���Oxygen Sensor Inspection:





3. Refer to flowchart for testing procedure.