O2 Sensor Heater Wiring Test

Рет қаралды 126,419

Күн бұрын

Explains the O2 Sensor Heater Wiring Test using cost effective procedures. Good for the Professional Tech or DIY .
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Пікірлер: 87

@sanchopancha1561 2 жыл бұрын

Absolutely mandatory before replacing an O2 diagnostic probe (downstream). I achieved the tests on PCM and probe. Good job, thanks.

@ADPTraining 2 жыл бұрын

👍

@jadesystem 5 жыл бұрын

Very professional and technical excellence. The biggest headache on modern combustion engine vehicles near or exceeding 100k miles is the dreaded "check engine light". I didn't even know there was a heater inside these O2 sensors. Just a pain-in-the-ass to remove if not had anti-seize grease prior. That's just one issue now there's more headache with a heater issue. i.e. PO131 OBD2 code. Best after purchasing any vehicle with 100k miles is to replace all of the O2 sensors for any unforeseen breakdowns ahead.

@ADPTraining 2 жыл бұрын

@edwardsonequipment4463 6 жыл бұрын

Thank you for your attention to the diagnostics questions. Your videos are nice and professional.

@ADPTraining 6 жыл бұрын

Thank you

@PenipasWainetti 6 ай бұрын

Thank you for the information. Could you share with the wiring diagram for crankshaft position sensor for MR20 engine ?

@evertonstedford3126 2 жыл бұрын

Great discussion

@nofear6235 Жыл бұрын

great, useful video. I am hunting P2237 and P2238 for bank 1 sensor 1 on my 2008 Toyota 4RUNNER V6.. Bank 1 is a passenger side. I replace both upstream AF sensors a year ago for unrelated OBD II code with OEM Denso, I doubt the code I experiencing now are the faulty sensor itself. Sometimes these codes are going away and comeback several weeks or days after. Need to pinpoint.

@ADPTraining Жыл бұрын

I'm willing to bet on a Reflashing issue. It all points to that.

@nofear6235 Жыл бұрын

@@ADPTraining what is reflashing? You mean with ECM? I did not do anything with it, not even disconnect the battery.. Can you please elaborate? Thank you for taking your time to read and reply.

@boostkash2640 5 жыл бұрын

Interesting it would be nice if someone can do a video on the heater RELAY . Thanks.

@kurtwm2010 4 жыл бұрын

There is no relay. Positive comes from the battery and negative from the ECU (computer). The heating element is constantly on when the engine is running

@ADPTraining 2 жыл бұрын

Thanks, DONATE: www.paypal.com/donate/?hosted_button_id=F9W5VPHTGWBV6

@peterconte2544 Жыл бұрын

Instead of using a dome lamp to test the heater power and ground, could you use an old fashion 12 volt probe tester? The one with a wire that clamps to ground and a small bulb that lights when the probe is touched to 12 volts.

@ADPTraining Жыл бұрын

Great, make a vid about it then.

@chankokhoi4496 7 ай бұрын

This video is very good to know tqvm Brother

@leluthor5357 5 жыл бұрын

Hi. I have four wire sensor. Which i understand the two same color which are white are the heater. But my question is, to do this test, how would i know which one is the heater ground? Thanks in advance.

@ADPTraining 5 жыл бұрын

Doesn't really matter, it's a good question, but it's a heater, so polarity doesn't matter. However, beware because the other two wires, one is black, which could be signal, and gray which could be ground. For some reason, these older aftermarket O2 sensors the black was signal and the gray was ground. Go figure... Good luck, Mandy. autodiagnosticsandpublishing.com/

@joes3989 2 жыл бұрын

Thank you, this video is amazing! I would like to ask, I have a motorcycle engine with a failed heater on the downstream 4 wire sensor, but I can't find an original used or oem part for replacement (I cant afford 450USD right now) but I see that Bosch once made a universal 4 wire O2 sensor ... is it reasonable that if I find a cheap O2 used sensor from a similar size engine from some other manufacturer - that I would be able to use that sensor if rewired correctly - are they all basically operating at the same output voltages?

@ADPTraining 2 жыл бұрын

Absolutely, yes and it doesn't even have to be the same size engine. The O2 sensor senses Oxygen independently of engine size. A new universal O2 sensor is probable less than $100. Also, make sure your bike doesn't have an AFR or air fuel ratio sensor. They look the same, but are different. Good luck.

@joes3989 2 жыл бұрын

@@ADPTraining The bike is a 2008 Varadero 125, it has the smaller 12mm thread for the O2 sensors, so was thinking to get a reducer and use an 18mm O2 sensor but so far have been using the bike with the sensor missing - lots of secondary combustion on heavy de-acceleration, not sure if that's from the missing sensor or the less restricted aftermarket down-pipes (installed as a result of destroying the original during an engine swap) in any case, I really appreciate you putting these videos together, very well explained on the theory and the troubleshooting. 🙏Thank you!

@tordfroling629 Жыл бұрын

Very good movie. Thanks.

@MechanicTechnicianRepair 6 жыл бұрын

Exselete. Video. Amigo. Nice. Video

@ADPTraining 6 жыл бұрын

Thank you...

@blackdevmert918 9 ай бұрын

hi please may i know if the two wire of heater can be interchangeable plus and minus.? thank you

@ADPTraining 9 ай бұрын

Generally yes, but I'd try and properly connect the two.

@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?

@ADPTraining Жыл бұрын

Depends on manufacturer.

@jessemurray1757 Жыл бұрын

each wire turns black when clicking....makes sense. Would be a bad idea if to make them different colors, that would get confusing.

@rajeshram536 4 жыл бұрын

Great video, I done a live test on my oxygen sensor, it comes on for like 30 secs then no response, I fitted a new sensor. Can this test find the fault. AUDI 1.8t engine, AGU, it’s been swapped into a mk1 golf/rabbit

@ADPTraining 4 жыл бұрын

You also have to make sure the O2 heater is working. Also, see if you have an AFR or a regular O2 sensor.

@mulja23 7 ай бұрын

Greetings, I have Ford Focus 1.4 16V from 2003. My problem is that I only have error code P0420 and find out that my heater circle on both upstream and downstream are not working. There is 12 volts on heater element but the problem is ground which controls PCM. Is there any way to bypass PCM ground?

@ADPTraining 7 ай бұрын

Not really. Need to find root cause.

@mulja23 7 ай бұрын

I think that problem is in PCM because there is 12 v on pcm ground connector. But when I connect light bulb (12v 21w) and start my car bulb is not flashing. When I connect amp meter in series with heating element of O2 sensor by turning car key there is "spike" of 0.86 Amps and then lowers to 0.02 Amps. When car is running ampermeter shows constantly 0.02 Amps. I think that transistor or somethimg controling ground in PCM is burned. I was thinking bypassing PCM ground with chip 555 and some power transistor.

@laurenceleeroceta8772 6 жыл бұрын

Thanks for the video.

@ADPTraining 6 жыл бұрын

Thanks Laurence...

@jennilynarrivado4839 5 жыл бұрын

thanks for this video

@ADPTraining 2 жыл бұрын

Thanks, DONATE: www.paypal.com/donate/?hosted_button_id=F9W5VPHTGWBV6

@olenaerhardt7725 3 жыл бұрын

Searching for the options to remove P0446, I replaced 2 oxygen sensors (along with many others). 2001 Saturn SL2, 130K. After 10 mi got P0038. I thought defective downstream O2 sensor, but maybe it is just bcs the heater doesn't work in that car. But w/original sensor there was no code P0038. Can you clean those sensors w/some carb cleaner? So it will be more time to find a proper sensor, if it is not that broken heater of course. I would appreciate any opinion on this problem. Thank you for the informative film.

@ADPTraining 3 жыл бұрын

Code P0446, otherwise known as Evaporative Emission Control System (EVAP) Vent Control Circuit Malfunction, indicates that your car's computer has detected (or believes it has detected) a problem with the function of the EVAP system. This is a circuitry code. This has nothing to do with the O2 sensors.

@olenaerhardt7725 3 жыл бұрын

@@ADPTraining Thank you, it is good to know that they are not related.

@naushadali95 5 жыл бұрын

thanks for making such a good video.

@ADPTraining 5 жыл бұрын

No problem

@tani_armani7855 5 жыл бұрын

Ok. One question. The AFR heater (lsu 4.9 afr sensor) resistance or/and current value differs from light bulb resist/current. Will ECU will see that difference? If yes it will not close circuit and bulb will not flash...

@ADPTraining Жыл бұрын

Low current. Milli amp range

@luisalbertolanda 2 жыл бұрын

Hi,! I have a question in itself, what are the resistor for? What are you doing?..

@nigelclark7360 3 жыл бұрын

Good info

@DJ-tn7vj 3 жыл бұрын

Great video Sir

@LewsSpeedShop 5 жыл бұрын

Thank you

@xyz20121000 3 жыл бұрын

what if the sensor's ground is computer controlled and it is short to ground. ??? p0141 . Ground is on all times , 12v wire is on all the time with Ignition on . code p0141 registered. how to find short to ground of the sensor's ground.? thank you 🙏

@ADPTraining 3 жыл бұрын

Well that's exactly how it works. Heater Gnd can't no on all the time. So, yes there is a short to ground. Sensor ground is on all the time, but the heater is either power controlled, ground controlled or PWM controlled on newer AFR sensors. www.autodiagnosticsandpublishing.com/

@user-pu9mj3rz5t 5 жыл бұрын

thank you

@skodaseat8637 5 жыл бұрын

I think Lean condition is low voltage and rich condition is high voltage, But you are telling opposite, Pls. correct me if i'm wrong..

@Ed-vi4rx 5 жыл бұрын

That is what i see. 0.1 v is lean. Therefor i got code P1273. so low voltage is lean °. Are we wrong=

@ADPTraining 2 жыл бұрын

Yes

@Seeker887 5 ай бұрын

Afr opposite of o2

@nazrulsafuan266 Жыл бұрын

How to fix p0420 code ??

@jennilynarrivado4839 5 жыл бұрын

thanks this vedio

@ADPTraining 2 жыл бұрын

Thanks, DONATE: www.paypal.com/donate/?hosted_button_id=F9W5VPHTGWBV6

@rickruggieri7284 2 жыл бұрын

Why not just use an ohmmeter to check the heater element or wiring?

@ADPTraining 2 жыл бұрын

Resistance testing us not loaded. Meaning there's no current flowing. Any issues will not come out Ohming out the circuit.

@muhammedsons2675 Ай бұрын

Before teaching people try to teach yourself because you are teaching people wrongly, A high voltage signal indicates an imbalance in the air-fuel ratio - a low oxygen concentration in the exhaust gas (and an excess of fuel running through the engine) that means it is a rich condition not the lean condition, thanks

@antran9806 5 жыл бұрын

thanks very much

@ADPTraining Жыл бұрын

Cool

@DJ-tn7vj 3 жыл бұрын

Where can I get access to this software?

@ADPTraining 3 жыл бұрын

www.autodiagnosticsandpublishing.com/auto_repair_software_catalog.html

@brainnetworks 2 ай бұрын

rig up some random headlights ?...that i just have sitting around to just do the test? this is way too complicated. testing procedure setup is too time consuming. how many people have random spare headlights sitting around their garage. maybe we can go to junkyard buy some for $30 which is the same as o2 sensor.

@lolppfhd6178 6 жыл бұрын

Swift sx4 check engine light is not working relay is ok plugs not get current and injector can't fire

@ADPTraining 6 жыл бұрын

Ok, the CEL not working is key here. Look for missing power or ground, but really look. That's the only explanation for CEL not working. Then of course if CEL not working, means no power/ground, no injectors, no spark, etc. Check and please repost back here, Mandy.

@NiteTrain89 5 жыл бұрын

Lolpp Fhd check power and ground for pcm/ecm

@jennilynarrivado4839 5 жыл бұрын

sir may i ask your favor if ever i need a wiring diagram of car toyota landcruiser 1gr-fe

@ADPTraining 5 жыл бұрын

Yes, this is my product for that. www.autodiagnosticsandpublishing.com/Automotive_Interactive_Wiring_Diagrams.html

@lloyde73 3 жыл бұрын

Asian cars can you make the wiring digram?

@ADPTraining 3 жыл бұрын

Sure, here's where to get them. www.autodiagnosticsandpublishing.com/Automotive_Interactive_Wiring_Diagrams.html

@joseriggio4366 5 жыл бұрын

can the heater wires be interchanged.? thanks

@ADPTraining 5 жыл бұрын

Yes, but why do that?

@joseriggio4366 5 жыл бұрын

ADPTraining The answer is a little long but because you have the courtesy to reply my question I will explain, my daughter hit an street bump and the O2 conector disapear leaving the 4 wires rubbing the street, the car harnes conector was damaged, so I decide to connect the wires with but splicers and found the two heater wires are not color coded as the signal are, and because after clear the MIL, it came back with some heater low voltage code the only I can think it may be the problem, but I guess is not, Ihave to keep investigating, thanks so much and any help will be super appreciated

@kurtwm2010 4 жыл бұрын

Way too complicated... Just measure the amp at the fuse box and see what the current draw is. 5 minutes job. If you don't have an amp meter remove the sensor from the exhaust. Start the engine and hold the sensor with one hand. If you smell burning flesh, the heater works perfectly, if not replace the damn thing.

@ADPTraining 4 жыл бұрын

Hundreds of sensors get replaced needlessly. A loss for the consumer, shop owner. Thanks for posting. See our training downloads here. autodiagnosticsandpublishing.com/