Bench Testing Oxygen Sensors

Рет қаралды 58,095

Күн бұрын

Пікірлер: 22

@joeteejoetee Жыл бұрын

GREAT Video. On my Lexus LS400 1st sensor, the 2 white wires (~8.3 Ohms cold) connect to the internal heater element, and the Black and Grey wires connect to the Zirconium sensor element. These 2 wires have zero conductivity, nor any voltage at room temperature. On the bench (with Indoor breathing air) the sensor output wires (Black&Grey) produce a voltage ONLY when heated by the 2 white wires. The sensor even produces an output voltage (in room air) with only 5 volts on the heater. Room air is around 21% Oxygen, and they are very sensitive. This is why you need a Propane flame to reduce the amount of oxygen content for the sensor to read lower. Great Video - Thanks!

@bensiemers5094 Жыл бұрын

Thank you. I am glad you found it helpful :)

@kennethodonnell2068 2 жыл бұрын

Nice explanation. Simple and to the point. No frills. I have 4 original O2 sensors at 175k miles. Scanner says which side it's on but which of the two is bad. The code also says it could be an exhaust leak. This will help me narrow it down a lot! Thanks!

@commieslayer8218 2 жыл бұрын

Very good and expanded tips for other issues - thanks so much.

@pigeonsil240sx Жыл бұрын

hello does this same test apply to AF wideband type sensors? thank you.

@bensiemers5094 Жыл бұрын

That is a very good question. No, this procedure would be for conventional O2 sensors. Your procedure for wideband is quite a bit different. Unfortunately, I do not have content on that test, but there are posted videos elsewhere to assist.

@paulromsky9527 2 ай бұрын

Nice video, gave you a like, but the O2 Sensors normally start to operate at 600 F (316 C) not 600 C. You said 600 C a couple of times in your video. For a black body radiator (like the steel cage around the sensor element), 600 F is a dark red color, 800 F is a cherry red, and 1112 F (600 C) is orange-yellow. Don't try to heat your O2 Sensor to 600 C (1112 F) in an uncontrolled environment... 600 F to 700 F is hot enough for bench testing.

@bensiemers5094 2 ай бұрын

Thank you, Paul. You are definitely right. My Canadian influence came out in that one. I appreciate that you pointed that out. I added corrective captions in the respective places to straighten that out.

@fireboy5043 8 ай бұрын

Great Vid Thanks 👍🏽

@xaker69 Жыл бұрын

I cant understand, how removed from car O2 sensor can generate 0,1-1V ? Please explain me

@bensiemers5094 Жыл бұрын

The oxygen sensor is actually a battery that must be heated to work. When the exhaust warms the sensor adequately (or the heating element internally does), if there is a difference in concentration of oxygen, between the inside and outside elements of the oxygen sensor (anode and cathode) it creates a small voltage that can be read by the ECM. It is very quick to respond to changes in Oxygen levels as a result. By heating the end on the bench with a torch, and bringing it closer and further, because the torch uses hydrocarbons, the distance of the torch from the O2 sensor will vary the Oxygen levels available at the O2 sensors end, and therefore creates a voltage variation that can be interpreted. It should rest between .1 and close to 1 volt when hot.

@larryreno8293 Жыл бұрын

ZrO2… Chemistry! And heat

@fredjones1238 3 жыл бұрын

explained well thanks

@Zeberka767 Жыл бұрын

My oxygen sensor has 4 wires, 2 black, 1 white, and 1 blue. How do I determine which wire represents the terminal of HT, +B, OX, E1?

@bensiemers5094 Жыл бұрын

It sounds like you are using symbols from a specific manufacturer's wiring diagram. Each manufacture uses different codes and without seeing the actual wiring diagram, I wouldn't able to comment on that, specifically. You can look up the wiring diagram though and look at how the wires trace to the actual sensor to determine what is the heater portion, vs the sensor signal and ground.

@LuceroteloAlcala 23 күн бұрын

My O2 sensor are 5wires how do I test into voltmeter?

@bensiemers5094 22 күн бұрын

You are likely dealing with a wide band oxygen sensor, also referred to as an air fuel ratio sensor which uses a different method of testing than I show in this video. It would be too involved to explain on a message, but there are others with videos explaining this for your specific application.