Oxygen Sensor Trick and Operation Guide

In this video I will show you how and Oxygen Sensor aka air fuel ratio sensor works, how the heating element ground power and the signal wire work and a hack you can use to identify each wire. Using the knowledge in this video you'll be able to diagnose and fix problems with oxygen sensors with one, two, three or four wires.

Disclaimer:
Due to factors beyond the control of Ratchets and Wrenches, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. Ratchets and Wrenches assumes no liability for any property or personal damage that may arise from doing a repair on your vehicle after watching any of my repair video's. Due to factors beyond the control of Ratchets and Wrenches, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Again Any injury, damage or loss that may result from improper use of tools, equipment, or the information contained in this video is the sole responsibility of the user and not Ratchets and Wrenches.

[myRatchets]

So I shot this video, edited it for a few hours than realized I misspelled signal on the whiteboard hahah wt..

[rl]

His patience and calm demeanor is awesome

[rj.parker]

Good stuff, writing this down for future use. Find the sensor heater and ground with an ohmmeter. On the harness find the heater hot with a test light. Find the harness permanent ground with a test light, it is used by the signal output. Then find the harness switched ground by turning on the engine power and a test light. The remaining harness wire is signal.

[Toddtoddy]

Bro you make the most informative and accurate car repair videos on the tube.

[kyleevans]

I love the fact that you explain everything so well, you get to the point in a timely fashion, you don't have horrible music, I can hear you perfectly ... thank you for making quality videos that I can use an don't have to skip thru half of it ... thanks again

[redjar]

Excellent description and explanation. Straight to the point without any fluff. Great video

[charlestatakis]

Another perfect, easy listening vid. I wish you had more time to do these, you're the perfect informed
moderator.

[justincarroll]

Thanks man you are doing a service for society. I've never called b.s. on any of your stuff

[PastorMaxViana]

Bro thanks for the info, I’ve learned so much in just 1 video of yours and I got my car to pass smog test that Mercedes tried to charge me an arm and a leg to fix the issue.

[jondoe]

As a mechanic myself, I could not of said/shown it any better than that. Great video.

[jimmysapien]

Who needs Scotty Kilman or Chris fix
Great video Thanks 😊

[carlosedwardos]

OMG! - after me pleading with you to do this for 4 years, you finally got a Patreon account!

[Damienjking]

Dude, you make such great use of that testing light and multi-meter. I love the way you seem to be able to troubleshoot any electrical problem. You’re very impressive. I don’t have an immediate need for any of this knowledge, but I love watching a wiz at work so I enjoy your videos. You’re expertise is inspiring and you have a real knack for explaining these concepts so they are understandable even to a layman. Keep up the great work.

[Alan-trfb]

G'day Mate, I always watch your shows on my TV however today I'm using the computer to view your video on how to test 2 02 sensors. Which is why I'm using this opportunity to comment. Fantast work, your shows are easy to follow and always like/love the little side track you take us down usually comedy-type commentary. Cheers, very much appreciated. I'm from Australia. 👍

[honda]

Thanks for great tutorial on oxygen sensor function and wiring, and identifying those wires.

[siggyretburns]

Run for president in 24. You got my vote. That explained everything i needed to know about my O2 issues. Thanx.

[ridesharesourcedriver]

Hi. When decelerating, my fuel system is in open loop, but once the speed fall anywhere between 20 to 10 mph, for a second I get OL has not satisfied yet conditions to go to CL, then immediately goes into CL using all oxy sensors, while still decelerating down from 20 to a stop. What would that indicate and does need to be done? No codes, no lights.
PS: you’re one of the most knowledgeable mechanics and the videos show it all.

[yazming]

I'd vote for you if u run for President

[JohnSmith-tx]

Excellent explanation. No bs wasting my time but straight to the point. Thank you sir.

[lostbrokenmind]

I love your descriptions the way you explane every thing my noggin (witch now is a mush melon from all the shots to said noggin in 53 yrs) I may get my 98 ram running finally. thanks man appreciate you.