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How to quickly test an oxygen sensor circuit (GM bias voltage)

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How to quickly test an oxygen sensor circuit (GM bias voltage)

This is an older GM vehicle (1994) but the tests I am showing can be applied to all oxygen sensor circuits that are using a bias voltage on the O2 signal wire. GM O2 Sensor Testing Using O2 Sensor bias voltage to quickly test for an open in the signal circuit. Symptoms: - failed emission test - check engine light - poor gas mileage Fix ...

132.8K viewsMay 17, 2011

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