I have looked at many many videos on my fault code P0037 and this one by far has given me the most in depth information on what may be the problem. Thank U!!!!!
This code popped up and I was a little confused when it said O2 sensor heater. But this video clearly explains what O2 sensors do, what where they're located and what the cause might be. I love coming to this RUclips channel.
The whiteboard paired with clear explanations made for a great video 🤙🏼 Currently working on a different chassis and I still feel confident enough to diagnose. Thank you.
Great detailed video, however after going through all of your steps on bank2, I realized that if the O2 heater is good, the O2 sensor would be warm / hot to the touch and include all of your TS steps! BTW, still waiting on that 2000 Chevy Silverado door actuator change w/o opening the effected door! Thanks again!
I am really blown away in how in depth this quick video was packed with valuable in depth information, I learned a lot in this video and I greatly appreciate the instructor in his explanation on what could be the reason this sensor is faulty. Variables that I never thought could be the reason like the after market remote starter.
absolutely amazing video! great explanation and demonstration on how to properly diagnose it!!! Helped me figure out that my PCM was bad after the i got a o2 sensor heater malfunction
Finally a video that doesn't leave me scratching my head.... Thank You can you make one explaining how to install door key auto locking device pertaining to the actual key and tumbler. 03 bmw x5?
Excellent video. I have a '99 GMC Sierra 2500 that has an intermittent engine light, P0141. I already changed the sensor once myself and it just came back on. It's off at the moment, but if/when it comes on again, now I know how to test it. Funny that twice when I had it in to the mechanic(s) for other things, they couldn't seem to figure it out🙄 Useless...
This is the best video explaining how this works but is only a problem I have all O2 sensor codes and there are no videos to see what to look for is driving me crazy
Check the set of wires under your truck. Believe me i took this advice and when I inspected the wires under my truck where the transmission and the shaft meet. The wiring harness was rubbing so bad that it exposed the wires. Those wires lead to engine. As soon as i got them closed back up problem solved and my truck runs way better than before. Ever since i bought my 2009 suburban this is the best it ever ran. This got rid of this code and the other ones that had to do with faulty cpu code. Believe me an exposed wire can actually make your engine run bad and set off different codes.
Super helpful thank you! I need help. Instead of replacing the O2 sensor, I preformed the test like you showed in the video. I found that I do have power to the senor but no pulsating light (4:56) when checking the PCM circuit. No light at all. So, I'm assuming something is broken, as explained in the video at around 5:56. How to I find this broken connection?
Great video! I have a 2011 Impala LS and I can't clear the P0036 and P0141 codes. I replaced the sensor, I have power on the supply side heater and the computer grounds as well. I ohmed out all 4 wires to the ECM and found continuity and no resistance. I believe either the heater is bad in the new sensor(Denso) or the ECM is faulty.
I have heater circuit code for all the 4 sensors for Ford explorer 09 could there any other reason apart from the possible reason you stated in the video just and what could they be would be a great help to check and diagnose them
If you dont have access to wiring diagram or forget the colours you can switch sensors side to side and see if code moves same as you would do moving coils to check misfire .
+Lenny Segura Thank you! We love empowering our customers and showing how to perform DIY auto repairs with our high-quality auto parts. 1aau.to/m/Shop-1AAuto-c
Had to extend my o2 harness for new headers and accidently burnt the wires on my headers, so made a new harness and had idle issues so went and got a new o2 sensor and it fixed the idle issue but now I got this code, didn't even think to check the fuse whichis probably blown from the wires melting and shorting...
I have that code in a Golf 4 1.4 (2001). The car fails the enission test and sparks get black very quick. But the sensor ( 5 wires) was already replaced. I tested the resistance of the heater and the voltage both with a multimeter. Resistance was about 4 OHM and voltage was 12 volts. Obviously, the engine is running rich. CO is 5 percent . I replaced nearly everything, but sparks get equally black very soon. First emission test in january 2024 showed 10 % carbon monoxide (engine had no emission problems in january 2022) Oxygen sensor and catalytic converter were then replaced. Second emission test showed the 2.4 % carbon monoxide. Better but far from good. Then temperature sensor, MAP (engine has no MAF) and ECU were replaced and electric throttle body was cleaned. Sparks were still black. Then fuel regulator and throttle were replaced. Sparks still black. Third emission test in octobre showed 5-6 % carbon monoxide. A live test shows an air/fuel-ratio below 14 most of the time. How common is it, that new oxygen sensors do not work properly? Should I get a new oxygen sensor?
Does the heater element only turns on while the engine is cold then shuts off, I have a 08 Jeep Patriot and the temperature of the O2 sensor is high even reaching operational temperatures. Would it be bad ECM? Car runs great.
I think on the second testing on the tip of the oxygen sensor is not enough to say circuit is good because we need to test the wire from the tip of the O2 sensor to the pcm port, I’m I wrong?
Are you suppose to supply 12v directly to the pcm bypassing the load in the circuit? Could have just backprobed and should have had 12v on both heater wires Key on if the circuit was good,
Very nice video, perhaps I would add to measure the average resistance of the sensor itself, just to prove degradation of the element itself, but normally, there would be no continuity. But how does the control unit of the car knows the element of blast ?
Hi! What is the expected current flowing through an O2 sensors heater? i measure 0.5A only, which would be some benign 7 Watts of heating power. I measured 4 Ohms on the sensor which should give me more than 3 amps. Or is it pulsed and thus less? Plus side of circuit is fine, the cable to the PMU i still have to test. If the PMU is the problem, what do do?
good video ,, thanks for the info ,,, i have a 2009 mountaineer v8 and my check engine light just came on , when reading the code it show al 4 oxygen sensors are faulty ,, can this be right ?? ,, fuses are good ,, any adviced ? .. thank you .
Very nicely explained. I had this code and replaced with a new sensor and got the p0420 code now instead of the original code. Any help would be appreciated.
Great video, you explain that perfectly. One question though how do you check the blue wires that you have going from the O2 sensor to the PCM to see if they're okay? The power wires I understand how you did that but I was just wondering if the power wires are good how do you check the other two wires going to the PCM? Thank you very much have a good day
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I have looked at many many videos on my fault code P0037 and this one by far has given me the most in depth information on what may be the problem. Thank U!!!!!
This code popped up and I was a little confused when it said O2 sensor heater. But this video clearly explains what O2 sensors do, what where they're located and what the cause might be. I love coming to this RUclips channel.
The whiteboard paired with clear explanations made for a great video 🤙🏼 Currently working on a different chassis and I still feel confident enough to diagnose. Thank you.
brilliant explanation for us dummies that know WHAT the code is but not sure HOW to test what's going on! Well done
Don’t often comment, but this was a great instructional video
your drawing helped me understand how the oxygen sensor worked found blown fuse cleared code on cheap obd reader magic thanks for your help.
Great way to explain what it could look complicated in a simple way ...Excellent Video !!
You tested and trouble shooter this issue like a Real Pro as my mechanic even learned so much!
Excellent skills
Excellent Video!! The drawing and your detailed explanation of what could happen in any given situation with the wiring/sensor were superb
!
This guy is a good teacher
It was helpful. Thank you. You were very clear, specific, and stuck right to the issue without going off topic. Great job!
+Andy L Thanks for checking us out. Shop for high quality auto parts on 1AAuto.com:
1aau.to/m/Shop-1AAuto-c
Most Informative video I have ever seen on RUclips for pin-out voltage check of 02 sensors, thank you so much for this info !
We need more people in the world like you great presentation short and to-the-point
Awesome video, broken down so it's super easy to follow along and understand. I like the way this guy explains stuff. Thank you sir.
Youre a man from heaven. Thanks alot for the explanation!!
Hi great video. The test light pulsing i assume is ecm doing pwm to heat up sensor?
That’s amazing. Probably is the most proper explanation on RUclips so far I found. Nice work
Great detailed video, however after going through all of your steps on bank2, I realized that if the O2 heater is good, the O2 sensor would be warm / hot to the touch and include all of your TS steps! BTW, still waiting on that 2000 Chevy Silverado door actuator change w/o opening the effected door! Thanks again!
very good video. very concise and to the point. its like, no need to go to automotive school when we got these very informing videos
I am really blown away in how in depth this quick video was packed with valuable in depth information, I learned a lot in this video and I greatly appreciate the instructor in his explanation on what could be the reason this sensor is faulty. Variables that I never thought could be the reason like the after market remote starter.
absolutely amazing video! great explanation and demonstration on how to properly diagnose it!!! Helped me figure out that my PCM was bad after the i got a o2 sensor heater malfunction
Finally a video that doesn't leave me scratching my head.... Thank You can you make one explaining how to install door key auto locking device pertaining to the actual key and tumbler. 03 bmw x5?
The best guy to explain trouble codes.. Bravo zulu..
Super helpful to understand how these work! Much appreciated. Time to hunt down my issue
I think this is the best video I have seen on this topic. Thanks.
Definitely one of the best videos,, well explained, detailed… It really helps to understand which the possible issues are and how to check them… 👍🏼👍🏼
Excellent video. I have a '99 GMC Sierra 2500 that has an intermittent engine light, P0141. I already changed the sensor once myself and it just came back on. It's off at the moment, but if/when it comes on again, now I know how to test it. Funny that twice when I had it in to the mechanic(s) for other things, they couldn't seem to figure it out🙄 Useless...
This is the best video explaining how this works but is only a problem I have all O2 sensor codes and there are no videos to see what to look for is driving me crazy
Awesome video no one has explained and showed this as good as you. Great teacher
All Yours videos means a lot of things! Thank You!
Check the set of wires under your truck. Believe me i took this advice and when I inspected the wires under my truck where the transmission and the shaft meet. The wiring harness was rubbing so bad that it exposed the wires. Those wires lead to engine. As soon as i got them closed back up problem solved and my truck runs way better than before. Ever since i bought my 2009 suburban this is the best it ever ran. This got rid of this code and the other ones that had to do with faulty cpu code. Believe me an exposed wire can actually make your engine run bad and set off different codes.
Super helpful thank you! I need help. Instead of replacing the O2 sensor, I preformed the test like you showed in the video. I found that I do have power to the senor but no pulsating light (4:56) when checking the PCM circuit. No light at all. So, I'm assuming something is broken, as explained in the video at around 5:56. How to I find this broken connection?
Best Display YET!!!!
You're the man I love how you did it on paper good job 👍
Great video!
I have a 2011 Impala LS and I can't clear the P0036 and P0141 codes. I replaced the sensor, I have power on the supply side heater and the computer grounds as well. I ohmed out all 4 wires to the ECM and found continuity and no resistance. I believe either the heater is bad in the new sensor(Denso) or the ECM is faulty.
Best video so for I have seen on utube. Excellent explanation
This helps me with a p0130, thank you 🙏
Super informative video..need to check my issues now!
At last a clear ,precise diagnosis thank you
This is a good information to know the O2 how to check it think you very much Brother
best video about this subject i've seen! Thanks!
Awesome, very interesting! Thank you for an explanation. I have Chevy Express van and it throws the O2 sensor codes.
Excellent job man.... Keep it up... You have been a real help understanding the working of O2 sensor 👍👍👍
I have heater circuit code for all the 4 sensors for Ford explorer 09 could there any other reason apart from the possible reason you stated in the video just and what could they be would be a great help to check and diagnose them
Question: What would a resistance test on the two wires that have the same color show?
Thank you very much for creating and sharing this video; the 02 sensor theory is simply and clearly explained.
What is a drag test? At 3:28 you mentioned it; thanks!
Thanks! Question sir, what will be the effects if heater circuit low?
If you dont have access to wiring diagram or forget the colours you can switch sensors side to side and see if code moves same as you would do moving coils to check misfire .
This video was amazing thanks for sharing your knowledge and experience
Bro Thank You Very Much This Def. Helped Me Understand What Is Going On With My Vehicle Now I Can Def. Stop Getting Ripped Off At The Damn Mechanics !
+Lenny Segura Thank you! We love empowering our customers and showing how to perform DIY auto repairs with our high-quality auto parts. 1aau.to/m/Shop-1AAuto-c
this is what i was really looking for thank you very much
Excellent demisntratino on white board. Keep up the good work
Informative video thanks 👍🏼👍🏼👍🏼
Anytime Samuel! We are glad you enjoyed it.
I have an aftermarket remote start system & getting these codes. What would cause the the codes? Improperly wired starter system?
Excellent demonstration!
Thanks for your teachings!, And simple break down of the mechanical operation.
Extremely helpful video.
This was simple and well explained. Thanks very much!
Great explanation and diagnosis! More of these diagnosing videos please!
Thanks for your testing procedures,great video
Had to extend my o2 harness for new headers and accidently burnt the wires on my headers, so made a new harness and had idle issues so went and got a new o2 sensor and it fixed the idle issue but now I got this code, didn't even think to check the fuse whichis probably blown from the wires melting and shorting...
Very good video! 👍👍
Very well done video, excellent explanation and showing of diagnosing procedure. Thank you!
I have that code in a Golf 4 1.4 (2001). The car fails the enission test and sparks get black very quick. But the sensor ( 5 wires) was already replaced. I tested the resistance of the heater and the voltage both with a multimeter. Resistance was about 4 OHM and voltage was 12 volts.
Obviously, the engine is running rich. CO is 5 percent .
I replaced nearly everything, but sparks get equally black very soon.
First emission test in january 2024 showed 10 % carbon monoxide (engine had no emission problems in january 2022)
Oxygen sensor and catalytic converter were then replaced.
Second emission test showed the 2.4 % carbon monoxide. Better but far from good.
Then temperature sensor, MAP (engine has no MAF) and ECU were replaced and electric throttle body was cleaned.
Sparks were still black. Then fuel regulator and throttle were replaced. Sparks still black.
Third emission test in octobre showed 5-6 % carbon monoxide.
A live test shows an air/fuel-ratio below 14 most of the time.
How common is it, that new oxygen sensors do not work properly? Should I get a new oxygen sensor?
Is bank 1 sensor 2 on the driver side? Or passenger side?
Do you have any videos on diagnosing electrical problems on headlights? My ballasts keep going off
Does the heater element only turns on while the engine is cold then shuts off, I have a 08 Jeep Patriot and the temperature of the O2 sensor is high even reaching operational temperatures. Would it be bad ECM? Car runs great.
You the best explained
You are the man thank you that helped like 180%…. Confusion over.💯👍🏾
do the 02 sensor better to buy it from dealership or any aftermarket sensor will work?
I knew u we’re going to give us a good video. That’s why I liked it before I started to watch
+building muscle Thanks for watching. We're glad you liked the video!
Would the light probe tell you if the wire was cut in half, or just if it's completely broken?
so is bank 1 sensor 2 behind on the driver side behind the cats?
Hi big up waching u from uganda africa
Great visual explanation !
What if you get all the O2 codes like you said at the end? What would you check first. Fuses were good in both panels.
I think on the second testing on the tip of the oxygen sensor is not enough to say circuit is good because we need to test the wire from the tip of the O2 sensor to the pcm port, I’m I wrong?
excellent video, you guys are the best!
Great job as it was very comprehensive.
+mike aho Thanks for checking us out! 1AAuto.com
This guy is great!! Nice and easy explanation
Excellent thank you 🙂
Are you suppose to supply 12v directly to the pcm bypassing the load in the circuit? Could have just backprobed and should have had 12v on both heater wires Key on if the circuit was good,
Excellent video .
how d you find the fuse for that O2 sensor
Very nice video, perhaps I would add to measure the average resistance of the sensor itself, just to prove degradation of the element itself, but normally, there would be no continuity.
But how does the control unit of the car knows the element of blast ?
03 Tacoma both cats and 02 replaced new plugs air filter all fuses goid is there a relay or something else to get the p0036 code off?
Hi! What is the expected current flowing through an O2 sensors heater?
i measure 0.5A only, which would be some benign 7 Watts of heating power.
I measured 4 Ohms on the sensor which should give me more than 3 amps. Or is it pulsed and thus less?
Plus side of circuit is fine,
the cable to the PMU i still have to test.
If the PMU is the problem, what do do?
Thanks for this video! It was a big help!
Glad to assist Chuck!
Please I need confirmation is bank 1 the left catalytic converter or the right ?
! Very Good !
good video ,, thanks for the info ,,, i have a 2009 mountaineer v8 and my check engine light just came on , when reading the code it show al 4 oxygen sensors are faulty ,, can this be right ?? ,, fuses are good ,, any adviced ? .. thank you .
could a break in the signal wires cause this p0141 code?
Very nicely explained. I had this code and replaced with a new sensor and got the p0420 code now instead of the original code. Any help would be appreciated.
Your cat is bad. Sensor is reading the same before and after the cat
How do I test the wiring for my o2 sensor of my 2008 honda pilot
The sensor has 4 wires, how do you selected the pink to test voltage instead of others
Your a genius !! Thank you
Great video, you explain that perfectly. One question though how do you check the blue wires that you have going from the O2 sensor to the PCM to see if they're okay? The power wires I understand how you did that but I was just wondering if the power wires are good how do you check the other two wires going to the PCM? Thank you very much have a good day
If the Oxygen sensor is fairly new, changed all sensors a few months back, what could possibly be the reason for this downstream sensor failure?
Great video, deff pointed me in the right direction