How to test an oxygen sensor on a Honda (scope vs voltmeter)

How to measure an O2 sensor signal with a scope and multimeter.

The car being tested in this video is a Honda but you can follow the procedures shown for any 4-wire heated oxygen sensor.

You do not need a scope to do these tests, you can follow along with your digital multimeter.

Testing procedures:
- signal circuit tests (amplitude and frequency)
- heater circuit tests
- signal circuit integrity testing
- scope testing an oxygen sensor
- digital voltmeter tests
Tools used:
- labscope
- digital multimeter
- backprobing tool
Related Videos:
- Ford O2 Sensor wiring quick tests (no bias voltage)
youtu.be/djyyKlIVeMI
- It's back! But is it the same problem? (1988 F-150)
youtu.be/-EihJ7hghXI
- Fixed Rich O2 (Is the sensor lying?)
youtu.be/ClCuoi3JxEI
- Chevy 4.8L Oxygen Sensor Test (fixed rich signal P0172, P0175)
youtu.be/H6lY42u19VM



Playlist:
(Chapters 4 and 5) Fuel Trim and Oxygen Sensor Testing
- youtube.com/playlist?list=PLD2809EEC7BAAF989

For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available at www.scannerdanner.com as an eBook or paper book.
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