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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OE Test Procedure




OXYGEN SENSOR INSPECTION

1. Warm up engine.

Allow the engine to warm up to normal operating temperature.

2. Inspect feedback voltage.

Oxygen Sensor Inspection - DVOM Connection:






Connect the positive (+) probe of a voltmeter to terminal VF of the data link connector 1, and negative (-) probe to terminal E1. Perform the test as follows:

Oxygen Sensor Inspection - Part 1 Of 2:





Oxygen Sensor Inspection - Part 2 Of 2: