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.
- signal circuit tests (amplitude and frequency)
- heater circuit tests
- signal circuit integrity testing
- scope testing an oxygen sensor
- digital voltmeter tests
- digital multimeter
- backprobing tool
- Ford O2 Sensor wiring quick tests (no bias voltage)
- It's back! But is it the same problem? (1988 F-150)
- Fixed Rich O2 (Is the sensor lying?)
- Chevy 4.8L Oxygen Sensor Test (fixed rich signal P0172, P0175)
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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On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!
(Chapters 4 and 5) Fuel Trim and Oxygen Sensor Testing