I’m having the same issue. I ordered a bank 1 sensor 2 02 sensor. Found this video and you confirmed that would be the fix. Thanks.

I had code for o2 sensor on an 04 honda civic lx. Replaced it with a 'delphi' o2 sensor and it seemed to run better, but had occasional hiccups, and started throwing a different code relating to the o2 sensor. Checked with multimeter, wiring was fine, plugs fine. Reluctantly, on the advice i found in forums, I replaced it again with OEM sensor (denso) and it actually worked. According to the forums, the other brands won't send just the right signals that it's expecting to get the way the OEM Denso sensor would.

Thanks for sharing this my friend. I was having issues with my car, cel light on and codes p0132 and p0152, it was driving me crazy, I never thought that the rear 02 sensors would be the cause of the problem. You just saved me lots of money,time and headache. Highly appreciate you. Thanks 🙏. Oh, and I was already subbed to your channel. Just like it.👍🏻

Thank You for sharing your advice and experience. You are helping many of us out here. God Bless You 🙏

So frustrating. Something that should be easy (replace an O2 sensor) and it turns into an endless battle....

Thanks for sharing this! I’m having this problem right now with my 2009 G37.. will try this asap and see what happens 🤞🏼

I dont even know how i came accross this video but i have a 05 4 runner with same issue throwing p0158 everytime even after cat and sensor was replaced very informative ill check on those coils and swap 02 sensors

Wow, I am having the same problem with my 05 4runner. I had change my driver manifold including a new upstream o2 sensor and it is throwing p0031/p0051 code from both bank 1 and bank 2. I will try changing out the 2nd o2 sensor to see if it works. What a headache.. thanks uncle. I'll try it.

*Imagine changing a whole exhaust system, all 4 o2 sensors ( twice ) and come to find out it was a vacuum leak*

Thank you so much my 2001 avalon had same thing 02 sensor both in bank 1 replaced but same code came right back up .

My 2003 Ford Mustang keeps throwing P0153 for Bank 2 sensor 1 slow to respond. I replaced upstream with a Ford Motorcraft O2 sensor. The code still came back. I don’t have cats and using MIL eliminators. I’ve been to the exhaust shop twice to check for an exhaust leak, and now you are making me think I may wanna check my downstream O2 sensor since it’s the original with 131,000 miles.

FYI ... I found out today that accidentally leaving one of the hoses on the intake near the air filter disconnected after changing the air filter will throw the exact code for this bank1 sensor2 O2 sensor failure my torque app said the light was on for 'o2 sensor slow to respond' ... instantly fixed by fixing the disconnected hose on the side of the intake tube if you have this code for bank1 sensor 2, first check all of the hoses that attach to the intake before digging into this O2 sensor repair - especially if you've recently had the air filter out if writing this helps at least one person it's worth it

Thankyou i believe this is my problem. Im gonna show my mechanic at auto electric shop cuz I cant get anyone to figure it out yet. My car bank 2 sensor 1 check code check engine light on replaced it twice after transmission renewed 2 mis ago from dealer. I hope its just a faulty ignition coil stinking up causing the sensor to pick up stinky and check engine come on. Thankyou. Where is your shop? Maybe I come to you if after this only gets reset and check engine comes back on. You have made sense and im not depressed and not anxious. Much prayers now. Wish me luck brother! Great upload. Please do more.

Thank you! I've been having same issues with my 06 Subaru Forester I'm just going to replace both O2 sensors now and then go from there. Great video. 👍

I’ll check that tomorrow. I just replaced both up and downstream o2 sensors on my matrix xrs and the engine light came back on. I have a second xrs. 😂 ima swap the coils and see if that works. 👍

Thanks. I really enjoyed your video. Tomorrow I will also change the downstream sensors. I have done everything else.

Thank you so much for this information I can't tell you how many cars I heard have this issue crazy how no one knows this especially mechanics

You’re a great guy for telling your story and helping others diagnose their vehicle issues. Thanks. Sub and Like

Thank you for your time explaining all this you saving me a lot of money i really appreciate it appreciate it

thank you bro for giving me enlightment in the darkness...i am having same issu...been headache for ages...wasting time wasting money replacing new upstream oxygen sensor couple of times for both top, the code keep coming back..now am gonna try your solution...wish me luck! btw i hv subscribed and liked your video!

P1130 AND P1135 at the same time on the V6 Camry. 6 years ago it was intermittent, check engine light comes on for 100 miles then automatically off for another 100 miles. It was on an endless on and off cycle forever, making a rush for smog check when its off. Then this past 18 months light stays on without automatically resets. I have a DENSO on order, it's my 4th one for Bank 1 Sensor 1. I think the last two DENSOS were fakes although the check engine light came off for the first few months. Funny it performs like new, very smooth and no lost in performance independent of on or off light.

O2 codes don't always mean the sensors. Check fuel trims as well. Don't just throw parts at a car.

You sound right i have a coil bad and o2 bad after getting new cats but the coil been bad its the 3 way pigtail plug flex fuel connector. i will be replacing that tomorrow

Thanks, I have a 2004 sienna. I ordered 3 upstream bank 1 sensors. lucky for me, i ordered from amazon and returned them. =D I will try the downstream sensor, then if that doesn't work. Change coils and plugs.

Wow very hard to find it so some times we have to do it little extras thinks Obdulia some times is wrong do not give ever think 100% good job congratulations bro god bless you

I cleaned the catalytic converters and the O2 sensors, and then I got the same issues you are describing here in my 2012 ford F150

Thanks for the story on oxy Sensor yet got a 2002 chevy cavalier with the problem....

Very interesting. I have a 2015 Toyota Corolla and then I’ve had a lot going on recently I have 443,871 miles on the car I’m the original owner and I’ve taken pretty good care of it up until last year and a half Money became an issue So I wasn’t on top of things But my car started bucking whenever I wanted to give it gas. If I gave it a little extra push, it would start bogging the track off light would come on, and I essentially wouldn’t really be able to drive it more than like 10 mph until I could pull over. First time that happened I turned the key off and I removed the key from ignition. I put it back in a couple minutes and cranked it over and it went back to normal. Things were going bad on my car. I was throwing codes for misfire on three and four. Those were replaced recently months ago I had Code replaced the coil and the spark plug on that one. Well, it turns out since it is an all electrical car that there were many My brakes for one there were times where I didn’t think I was gonna be able to stop. Yes, I needed new rotors and pads and those were replaced but I still was having this issue where it seemed like I was struggling to stop my car. Turns out it was my alternator, and I believe it was my PCV valve because that had never been changed So when we were in there changing it, we realize that all the vacuum hoses were cracked All of them were replaced, except for one that one actually connects the other end through the vacuum hose or line to the sensor, which I just replaced, which is the purge valve That is malfunctioning the brand new one just like the old one It’s giving a rat noise and at first it was kind of slow and now it’s really sped up My car will buck even when I have my foot on the break So I went to one of the parts stores and had them run a scan on it after all this had been done, and it comes up with code 4020 which indicates quite a few things for 2015 Toyota Corolla When we were in there, changing the PCV valve, we should’ve replaced the O-rings on the fuel injectors that never got done, and I had no control over it even though it’s an inexpensive replacement Because of financial issues My son was the one who was supposed to get the O-rings because his friend is very Mechanic landline and was doing the majority of the work and walking him through what needed done and he just decided he wasn’t going to get them even they’re only like two dollars So I feel like that needed to be done and wasn’t but the code that it’s throwing could be something to do with the temperature so this could be a solenoid, possibly or something of that nature in my opinion gas cap they took off and they listed in the gas tank, and there were something unusual, but no one ever bothered to fill me in with that meant Needless to say, it comes up as the catalytic converter Now somebody here on KZfaq said that if you’re getting a code for P4020 don’t think you can replace the sensors meaning the O2 sensor, upstream and downstream and that that’s going to correct the He says what the problem is, is actually the catalytic converter and that’s what needs That’s not cheap And it’s out of my financial Then again, so the sensors But sometime ago, when I had codes ran on this car when it originally threw the check engine light, which is over a year ago it said it was downstream sensor under the hood, which is up against the firewall Ideally in my humble opinion, both sensors would have to be replaced at the same time, but I’m almost positive it through an sensor and I think that is under the hood also because there’s another one down by the charcoal canister I just don’t have anybody to help me sort it out, and I am not mechanically inclined as I wish I was My son seems to think it’s jerking, and it is a misfire even though that’s not how the computer is reading it Which is why I find this video so interesting Because all of my coils are essentially brand new, and so are all my spark plugs, so they were not done at the same exact time Yet I had a mechanic, tell me that when I bought my coil, and even though it was brand new that it might be a fail when you buy anything off-line like that that could be the case, but then parts stores do the same thing and so when you walk into a store and buy some thing from them, there’s no guarantee that that’s gonna be good either That’s what they were gonna do with my hoses. Make us wait two weeks for the vacuum hoses and order them online just like we did so we bypassed them and ordered the ones that were available the one that I need for the vacuum line which wasn’t replaced and the hose is cracked And connect to the sensor that’s malfunctioning which is brand new cannot be sourced anywhere, but Toyota and even though it’s not a very big hose it’s probably going to have a big price tag And of course, I’m sure that has a lot to do with it even though the person who worked on my car said it really shouldn’t make a difference at all if it was replaced, I would feel much better, but there is a hose on the other end of the vacuum line which connects to the sensor and I noticed that that little piece that little tiny hose which connects to the sensor and then connects to the vacuum line is very hard and brittle and even though I can’t see a crack in it it’s flared at the end that connects to the sensor, so I’m wondering if there’s some type of a leak there and that that is creating the issue It’s too much and not having anyone to help me sort it out has been extremely frustrating along with the financial challenges My son has put me on that’ll help me with nothing else and I’m in my car for 7 1/2 years after being discarded by my ex who was very abusive, but my family left me here and all I keep hearing is I waited too long to do some thing to put myself in a better position, which obviously doesn’t solve anything it’s just insult injury Any input is always appreciated. Thank you for the video. I think it’s very helpful.

Thank you thank you thank you i love you i have been chasing this fault myself for about 3 weeks i have had a migraine headache over this i dont get headaches and useslly pretty calm and collected but man i liaten to you it was 10 at night when i watched your vid.i went back out and fid just what you said and it workexd so thank from thr bottom of my hrart

Thank you. I got a similar problem on 2011 1.2TSI but throwing p0136 and p0140, also thte engine runs poorly with poor gas milage with no misfires. The car was at the dealership 10 minthes ago, they replaced o2 sensor (bank 1 sensor 2) and igniters. problem kept coming back. i took the car yesterday to the dealership again. the car is still there. i will ask them to replace the ignition coils aswell.

I have found cheap fuel causes a lot O2 sensor problems even when the O2 sensor is working properly. I like Chevron gasoline with Techron additive. I also use SeaFoam to clean out my fuel and emissions system.

Useful information thank you for sharing.

And foreign cars are notorious for relay loose at the fuse relay distribution box. They get loose and or get corroded

My dude! I've been having the same exact issue. Already put in 2 new upstream sensors, still have code. Coincidentally, I'm about to change my ignition coils. If that doesn't work, I'll put in 2 new downstream oxygen sensors. Been driving me crazy

I changed my upstream o2 sensor today bank 1 but its an aftermarket sensor im also having a random misfire code on a 03 Chevy Avalanche i have subbed i found this helpful

I am going to try one or maybe both of your tips you showed me in this video . Thanks and keep your videos coming

Thank you for your information because I have 1998 toyota tacoma 2.4 have a o2 sensor I replaced still have o2 sensor code

Toyota make all 4 sensors with different connector and cable length, at least for my Sienna. You can't swap bank 1 sensor to bank 2. Bank 1 sensor cable is shorter than bank 2. And lower sensors have different connector.

good to know i appreciate it... ive swapped a couple primaries too... 06 4runner with the 4.7 v8 i may just swap all the o2 then...

Thx. Replaced Oxygen sensor near cat and engine light went back on. Will check my coil and see.

Hello guys I have a 2002 Silverado and keep getting P0157. This is sensor 2 bank 2. Downstream passenger side. This sensor has no real use other than making sure the catalytic converter is working properly. It is low voltage which would mean that there is too much o2 in the exhaust so the opposite of the cat not filtering enough. I have a diagnostic tool with real time data. The voltage is pretty much fixed and doesn’t have the sinusoidal pattern that you would expect, and is visible on the sensor 2 bank 1 on the opposite side. I have replaced the sensor with a denso and it comes back so on to the next steps. Going to check for 3v at the plug with ignition on and engine off for a step 1 of wiring test, as well as for exhaust leaks between sensor 1 and sensor 2. Checking this area because the upstream is fine but downstream is lean so the issue would have to be in that area. Interested to why it’s a fixed voltage with no sinusodal. Only way I can get it to react is with a fast rev of the engine it will spike to rich (.9v) for just a second and back down to the fixed voltage around .05v. Anything else to consider?

I had a P0139 DTC on a Dodge that was intermittent. I replaced BOTH sensors with Bosch units. Same code again. Come to find out, FCA had issued a TSB to reprogram the PCM way back when. When I went to the dealer, they tried to charge me $250 to reprogram. Hell, no…

I have had this issue for 5 months with my wrangler and almost the same issue.... Thanks going try

Have this same issue I replaced my downstream sensor and not the upstream one so theoretically I can just do the upstream one in and will work because usually downstream one doesn't matter as much as your upstream 02 sensor

grate video a person cant learn that in any school- thank you for posting you experience -you get my thumps up and subscribe- good day to you sir

Very easy test is make sure you have ground and 3 volts at the plug at the sensor with unplugged. Key on engine off.

It looks like during driving car computer store all of the cases when something is wrong with a sensor data and if it exceed some threshold it throw and error. So it's hard to get this error on short trips and at the same time easy to get it on a long one. What i see on data from o2 sensor it have to much oxygen in the exhaust for too long that could be because the spark is no longer as good as it was before or fuel injection system just doesn't provide enough fuel to burn all the oxygen. My car is hyundai 2007 with po133 error.

The intake manifold gasket it's causes of check engine light ,anyway,broken gasket or leaking.

Thanks for sharing your knowledge bro . Appreciate it much

Excellent. Thank You. I'm getting codes for both upstream sensors. I replaced all 4 and still get codes for both upstream sensors. So I can't really swap the back sensors. Not sure what to do at this point.

2008 GMC Yukon I’m having a P1133 which is Bank 1 Sensor 1 insufficient switching. I replaced both upstream oxygen sensors with AC Delco parts. It drives so much better now stopped my hard shifting, better MPG everything. But the code comes back randomly 2-3 days latter 100+ miles it come back on. I got it cleared and the same thing randomly days later it pops back up

Thank you for this... if you only knew what I've been through with my truck

I'm havinga P0430 code on my bank 2 sensor 2 on my 2015 Chevy Silverado 1500. I've replaced the sensor 3 times, the last time I bought an OEM and it worked for about a month and I just got the code again. I will be changing the coils and sparkplugs when I get a chance.

I have a feeling that the second case is similar to mine, but my car is a Infiniti 3.5, I had a code P0302 for a bad coil and switched it to another side to confirm and yes that coil was bad, so I replaced for a used oem one from ebay. The bad coil code never came back, but after driving the car 30 miles a P2A00 A/F sensor bank 1 code popped up and that sensor is in the same side where the coil was replaced(passenger side) So I suspect that the coil is not working correctly like you said. I will move that coil to driver side to see what happen,s I am experimenting and I will comment to post what happened.

Figure this is worth a shot- 03 dakota R/T, been chasing down a p0138 p0141. Replaced downstream sensor is oem mopar, new injectors, fuel pump, plugs, wires, coil, dist cap. (Old parts needed to be replaced anyways) but code remains. Garage I brought it too says circuit is ok, fuel control isn’t working on bank 1 of the motor? They quoted me another $540 to just diagnose the problem. Have had a few vaccum leak tests done all saying no leak, as well as replaced intake gaskets and valve cover gaskets. Also the CEL will come on and then go off for a few drive cycles and then reappear. Tried swapping wires of the downstream sensors and problem remained. Anything helps god bless

I'm still worrying about how to fix my 2004 Toyota Rav4 which has always had P2238 for upstream sensor. I replaced the sensor, cleared the code but the code persists. That's why I found this video here because I still want to find a solution and have the MIL go off

Great video, thanks

thankyou for this information Sir !

I still don’t understand what he figured out? Was it he had to change sensor upstream and downstream both at the same time and his problem was solved?

Great great video. Thank you

Just watched another guys vid and he found there are self learning codes that show up in the diagnostics reader that have to be manually deleted, gotta try these on my 06 altima 3.5

Thanks for the video, I'm having a problem with my O2 sensor, my catalytic converter was taken from my Toyota prius 2008 with sensor 2 together but after fixing it with Toyota original parts, the light has been popping up with code P0137, the O2 sensor low voltage bank 1 sensor 2, I went to Toyota they said sensor 2 is new and is good but it is sensor 1 that is bad and my gas consumption has gone up 25% but now I have changed the sensor 1, still the light is kept on coming back, I didn't have this problem until my catalytic was stolen. What is the solution?

Thanks for sharing this mate. My scanner shows, P0132 Heated oxygen sensor (H2OS) 1 bank, 1 - high voltage. Would it help if I clean the sensor or replace it? I dont see any chipped wires.

Thanks! Very helpful

I have lean codes that suggest vacuum leak but my downstream O2 sensor was cut** I have yet to replace the O2. I will try to come back with an update

Thank you brother

I keep getting p0031 and p0057 ever since I installed catless headers, even with brand new denso sensors on b1s1 and b2s2. All wiring is good, all fuses good, etc...Maybe I need to replace b1s2 and b1s1 as well ?

Having this issue right now with my 2007 Infiniti g35 coupe. I just got all 4 new 02 sensors, but I’m still getting a p0133 code which I think is bank 2 upstream. I no longer smell my car burning rich, however just the sever engine soon sign on my dashboard 🤦🏾‍♂️. Frustrating

I am having O2 sensor problems on my Isuzu Axiom. A P0141 and P0160. I can not figure it out. I put all new Denso sensors. Moved them around and codes still come up in the same place. Can’t find a body ground for the O2 sensors specifically so I assume it is grounded through the PCM. I will clean those contacts and hope for the best. Hopefully someone has some better ideas? Let me know. Also thank you to the KZfaqr for his insight. Will look into the ignition coils also.

I have a 2005 Kia Spectra5 with an error code of p0140, p0030, and p0304. I've purchased all new O2 sensors (three times for each) and I continue to get the same error codes. I also replaced the whole exhaust system, and most of the air intake sensors, including fuel injectors. My next step is to make sure the prongs to the O2 sensors are connected to the correct connection. Sometimes I wonder if aftermarket items are sometimes changed by a simple wire.

I wish that the ECU is better than throwing related codes and not the code for the actual problem. That makes people resort to parts-cannon repair strategy.

I have the same issue I going to change the rear I hope that's the problem thank you

Yeah some rear sensors will show a code for front sensor.

Good video, forgot the fuses though.

I have a 2019 Kia optima SX turbo ND the check engine light came on, so when I scanned it the code PO140 code came up. So I changed the downstream O2 sensor and my car is still throwing white smoke from exhaust pipe. What should I do next ?

Im having a similar headache. I get a p0139 code on a 05 Acura rsx. My o2 sensor completes but the catalytic doesn't. I go ahead and replace the rear sensor 3 times, I replace the front sensor 2 times, I fixed exhaust leaks, I replaced injectors, and even after all of that the code just continues to pop up. Mechanics don't know what the problem is. I don't even know what to replace anymore before I go ahead and replace the ecu.

I have a Honda accord 2005 I’ve change de downstream sensor and still the same codes pops up P0138 and P0139 i don’t know what it could be

Thank you! Your awesome!🤙

Another thing dust had worn the contacts down to a point where the voltage going to the coil was only about 2 volts after fitting a new switch i had no more trouble . this maybe worth checking

without listening to your video I would say you have a plugged catalytic converter and need to replace it or cut it off and drive with a straight pipe which is illegal . I would say anytime 02 sensors go off it's something plugged up so bad your engine can't breathe .An engine is about air flow .

I have spent too much money too and the mechanics can't figure it out too. I'm frustrated . SOS please

Having the same issues. Code p015B, replaced 02 and code jumped to p015D. Truck stutters when starting up. I “reset” the truck and code but showed up the next day. Weird thing is that it started up with no problems before check engine light turned on again

I have a question my 2005 Honda Odyssey i drover 22 mile this code poped up (P2627) 02 sensor Pumping Current Trim Circuit Low Bank 1 Sensor 1. Car runners fine

I've been having this horrible smell for months then my check engine light came on and the code P1054 came up . I had the top sensor replaced and now the check engine light keeps turning on and off with same code

I'll try this I changed mine on the top I'll swap it with the bottom. I got P0131on Volkswagen Golf 2017 tsi

I have a 2018 Camry 2.5 le that popped up with p2237 (bank 1 open circuit) replaced the front sensor due to chewed wires. Same code. I’ll see about getting the second sensor installed but $370 parts and install for the first hopefully if I replace it it’ll resolve it

I am in similar situation, I am getting engine light for p0139 bank 1 sensor 2 in Honda accord 2013. I replaced 02 sensor with Autozone one not OEM honda one. Do you think thats why? or should i change coils first to fix the problem ?? thank you for great video.

I had same problem with a 2019 fusion it turns out that it is really a catalytic converter that is under warranty work so it’s being replaced sometime this week luckily because it’s between 1000.00 aftermarket or 4000.00 dealer original equipment.

I just had a situation where. First it was bank 1 sensor 2, after I replace it. Code was bank 2 sensor 2, then bank 1 sensor 1 then bank 2 sensor 1. I had to replace all 4 sensors. I never thought 4 sensors would go bad at same time. 🤷🏻‍♂️

Hey, nice video, thanks, I'm in a serious war with my 2006 jeep liberty kj, got the p0150 code bank 2 sensor 1, replaced it with a new Bosch one, code returned, replaced again with a used mopar one, code back after cleaned all codes, so it can be the bank 2 sensor 2 the one failing or i misunderstood it?. Thanks

I think I damaged my O2 sensor with antifreeze, which I’m sure is the Bank 2 Sensor 1, maybe? But I know if I replace it myself to save $$, it will end up being a different one. Almost guaranteed.

I have 2014 Honda pilot with a p0145 bank 2 sensor 1 no activity detected, so I replaced the sensor and the code comes back on the scanner but no check engine light. So can see why the code will come right back after I clear the codes

Same prob. 97 Tacoma Started Throwing a Code one day about bank 1 sensor. Changed both bank 1 and 2 and it ran great for a couple months. Now it's throwing the same code for bank 1 again. No damn clue what the deal is.

Good night my 1998 toyota tacoma 2.4 po171 I replace all o2 sensor. I also replace masairflo sensor, l also spark plugs and wire with the coils. It say now bank1 sensor 2 fail.

I got the cat changed last year for catalytic converter P0420 error on my 2016 CRV. 6 months down the line I got the P0139 error. I changed the downstream sensor this time. 2000 miles more I again got the same P0139 error. I called Denso and they sent me a new sensor because of warranty. I called the mechanic to reinstall the downstream sensor and he says P0139 error may be because of upstream sensor also and recommending to replace upstream sensor. I am so confused this is driving me nuts!!!!!!

Thanks mate!

I have a 03 Accord i replaced the cat with a new flex pipe as well as both 02 sensors but only bank 1 is not clearing no matter how many times i clear it, what can i do to solve this

I have a 2012 Ford Expedition that was showing bank 2, replaced sensor, replaced catalyst with two aftermarket then put oem catalyst and same code keeps coming back

My car check engine light pops up within 0.5 miles after replacing bank 2 s2. Mechanic says it could be wiring issue and I need to go to auto electrician.

2007 h3 replaced both sensors & 15 amp fuse & now hummer stuck in first gear won't change gears