Bad Oxygen Sensor Symptoms - 8 Faulty Oxygen Sensor Signs 

I replaced my oxygen sensors this week. My car has 230,000 miles and the previous owner never replaced them. Turns out, they were both broken and for God knows how long. My car began running rough and backfiring, and once at a stop, would not move an inch, but idled perfectly fine. My guess, carbon built up everywhere it could and now I'm replacing just about everything I can think of. I got underneath my car and tried like hell to break them loose with no success. Breaker bars, O2 sensor kit from autozone, no dice. So I went to my neighborhood mechanic just to have the bolts loosened and it set me back $35. Took her back home and replaced the oxygen sensors ($20 each). Don't forget! There are two different types of o2 sensors, the Upstream O2 sensor (before catalytic converter) and downstream O2 sensor (behind the catalytic converter). You can't use the same oxygen sensor for both positions. Also, don't forget to reset your car's computer after changing dirty or broken sensors, especially if your CEL came on. If you're catalytic converter is toast and you have a cheap car in an area with no emissions tests, you can buy an O2 sensor adapter that will "trick" your computer into thinking the catalytic converter is there and fine. They sell these adapters on walmart. com for 10 bucks, and with great reviews. Anyway, I've done a ton of work to my car in the past couple weeks, trying to get to the root of my intermittent mechanical issue, and keeping my fingers crossed that I fixed her. Tomorrow I'm resetting her computer and taking her out for the big drive. Wish me luck! :)

Very informative and well narrated video. thank you!

Thanks. Getting ready to place downstream. Hard starts.

Great videos!!!!! Straight and to the point!

Hands Down this was the Best Overview of o2Sensors EVER!!!

Thank you , great video

I have the same issue on my ford explorer. I have changed the catalytic convertor and the two oxogen sensor and fixed the issue. The next day again come the check engine light. Then i realize and watch the youtube videos. Many of them are suggesting to put fuel injector and yesterday i put fuel injector including the full tank petrol. Fortunately it is success today and the check engine light has been disappear.

Great video

A shop, recently replaced the upstream 02 sensor twice. After I scanned it at Autozone, the results say the sensor is having a slow response. Should I buy a more expensive 02 sensor? The car feels like it is very sluggish, and check engine light only comes on when driven / car is warmed up.

Can these sensors go out at 30k miles? Or more likely that something that caused it to? My cars eml is p0138 but runs fine. And strangely getting better mpg

I have exactly problem like you said, problem on performance and idling.. need to service my o2 sensor

Hi there, hope you are doing well sir I would have a question about my car if you could help me out. I was just wondering. MOT has been done to my care which is a Ford fiesta, before the MOT the noise level was high in the car, its consumption was also high and it's felt like it doesn't have much power in it. after running a test on its computer to find any problems with the car, everything was fine. oil has been changed, oil filter and also Air filter was changed, last year spark plugs were changed, catalytic converter, oxygen sensor and they reset the on board computer. The engine ran very nicely without effort, very quietly, very quickly and its fuel consumption was perfect no noise whatsoever. The yellow engine error light came on when we were traveling, the noise level increased, the consumption also increased, the performance decreased. now I don't know what to do... any suggestions please

I have a polo 2014 model It keep’s misfiring I changed the timing chain and made a service but it’s still misfiring

This was very helpful thank youu for sharing your experience

Hi.I have w140 S320 96y and O² sensor wont work correctly, its on ON few sec and then its shut down/OFF Do i need to replace O² sensor? There is many different sensors in the market, witch one i need do buy?

I get P0172 today and when i scan the car it say bank 1 system too rich. What could be the cause of that?

I have a code reading P0060, is this the same issue. When I googled it, it says bad 02 sensor. You didn't mention that when you ran down the code numbers, I didn't hear P0060....

great , informative video , I wonder if you come across this strange problem engine 651 2.1 L (P02A7=cylinder4 fuel trim at min ) from the code you would think injector problem but sadly that was not the case , I swapped inj4 with inj1 and still the same problem P02A7 , went toward vacuum and checked all vacuum parts (intake manifold /vacuum resonator/turbo actuator/transducers/vacuum hoses) with no sign of vacuum leaks at all , in fact the system holding 15inch vacuum with no problem at a all , in regards to injectors tested with injector leak test all four injectors are leaking the same amount of fuel so I can't fault them , engine idling is fine / drive fine the only thing is if you cleared that code , you will get the full power of the engine I mean the turbo will be working as it should be until you drive in steady speed like 65miles/hour for 10 to 15 minutes as soon as you take your foot off gas pedal the check light will be trigrad and you will start loosing power specially up hill , the only suspect left for me is o2 sensor , I haven't replaced it yet , but when I disconnected no check engine light show up as if its connected , but am thinking that could be the o2 sensor is faulty thats why when the engine on that steady speed and by the time I let off the gas pedal , the ECU request the oxygen from the o2 sensor and most likely the wrong values from the o2 sensor is the suspect what do you think ? your help is appreciated

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?

Could this cause a cylinder 6 misfire I’ve checked spark plugs coil packs injectors and everything is fine I even replaced my camshaft sensor and crankshaft sensor it doesn’t idle as badly as it did but the check engine light flashes could the o2 sensor cause this.

Hello, Maybe you can help me with a question. The apologies of the case for my English, it is not my native language. I have a motorcycle and since it is already hot and idling the scanner shows a voltage in the oxygen sensor (it is a single wire) of between .8 and .9 which drops to between .1 and .5 when the motorcycle accelerated it also marks the change from open loop in idling to closed loop in acceleration. Is this normal?

on obd2 O2 1 makes waves and lambda O2 looks like a ladder. It's ok?

Got a 2002 Buick LeSabre limited off fb marketplace previous owner didn't replace intake manifold gasket right o2 sensor was going out ignition control module was going out 20 year old spark plugs og fuel pump and fuel filter 3 months later got everything done except o2 sensor 😂

Mau tanya knpa krta tiada warning kadng gegar enjin lpas jln dan mau stat lg exzust kuat gegar

I have santro xing car.when i drove about 3km and when i turn it off the engine . as soon as i try to start at the same minute i could not start the car it doesnt take the start so pls help me

Well, i had a full tank on my nissan. Ran 29km due to some errands. I noticed the fuel drop to 3/4 of the gauge. I tried to refuel again to check how much it consumed, or if my gas tank floater sensor is faulty. My god, it really did lose some fuel, significant amount. I lost about 9.3L of fuel on 29km. My car normally runs 7-8 km per liter! Could anyone know what else is causing this to drink so much gas? 1. Spark plugs are replaced and original parts 2. Replaced air filter 3. Newly changed oil (Amsoil OE 100% synthetic 5w-30) 4. Even the ATF is on the manual spec, Nissan Matic D.

Hi would a bad o2 sensor triger other codes

Can it cause noise more prominently when transmission changes gear?

My car is making a rattling sound where the o2 sensor is located. Only happens on cold start for 3 minutes then the rattling fades until unnoticable. Could the rattling on cold start for 2-4minutes only be a sign of bad o2 sensor or is it normal?

Everything he's saying my vehicle is currently going through at 87k. I was advised it may be a head gasket failure but we'll see when I swap em out for FREE.

Will a bad O2 sensor show on an emissions test if you dont have an engine light or code?

How do I diagnose this issue I have a n55 I’ve changed spark plugs coil packs fuel injectors and vvt solenoid and still sluggish I think your video diagnose the o2 sensor but I don’t have cats

After change of spark plugs SV6 commodore vf. Now slight rough idle notice but drives and accelration is smooth like butter. whats cause???? idle sits on 550 and stable even on idle but i can feel slightly rough. no check engine lights no vaccum leaks

Good for the soul

I changed my ignition coils, spark plugs, 2 new catalytic converters, new throttle body, new alternator, and lastly I put some fuel injector cleaner in. The misfire is fixed, the idle and the car shutting off is fixed. But the thing is, my car feels heavy when I accelerate to go faster and it has poor gas mileage. Today my check engine light popped up so idk if I needa change this 02 sensor or what. (I’m so close to giving up)

Would it cause my care to vibrate or feel like my car is off balance?

Wow just found out what's been happe😢to my car had! To? Watch once mechanic told me what needs! To be replaced

My car fuel consumption is very high about 40% increase. I was thinking it's oxygen sensor but I don't have check engine light On, I scan codes and no fault. What exactly could be the reason

I got a question can a bad o2 sensor make my car vibrate when I drive off from a complete stop? Can someone plz help me

These cause multiple misfire white smoke from exhaust it do mess like rotten egg…

I need help my 07 mazda5 grand touring starts but turns off after a few seconds Codes popping up P0131, P0301,P0137,P050A,P2119

O2 sensor down stream code came on in my 2010 300..changed it out an still there an runnin rough an jerkin like its gona die while ideling drivin a certain speed or sometimes shifts hard around 35 40pmh or wont shift in the next gear..gona change out the up stream next..anyone have the same problem an figuiit out yet? Put a new starter in it but sometimes cranks for 5 ish sec longer than it should before starting.

I have 2010 chevy camaro I replaced the 02 sensors and lasted for a couple months but then i got the code for the 02 sensors when engine light came back on now have to replace again its cheap fix. But mechanic also told me It can be a vacume leak as well.

Hi my Acura tl 2010 exhaust smell very bad and the car started showing check emission system with a check engine light,l cleaned my maf sensor and erased the codes but next day it came up again can anyone tell me something about it 😢😢

In where in canada

Well my car has been stalling and I took it to the mechanic and he replaced the throttle body for the code on the scanner I guess it was broken and that didn’t even fix the issue of my car my has still been stalling after I make a complete stop at a light or idle to a stop sign when I’m driving or when I’m turning a corner my car just dies out my dash still has power but my steering wheel locks up if i turned my engine off i need help any ideas…no scans pop up could it be a fuel injector issue or 02 issue I’m not sure any ideas?

could you have bad O2sensor without engine light ?

Well mine said it was cylinder 6 1st so i replaced the spark plugs and coil then it said the furl injectors i replaced them,then it said the converters i have 3 just as aoon as i replaced the converters it now rattles shakes like its full of water.gets hot within about 3/4 of a miles decreases in spees till it stops and clunks out.so im thinking oxygen sensors im sure i have plenty with 3 convertors.the mechanic says he thinks my engine lost compression.but it cranks and runs for a few minutes.

Anyone smelling gas in there car cuz it’s bad?

Sounds like why my bike shut dwn 02 censors.

What about white smoke while its idling. It only smokes when its idling and im stopped at red lights.

i replaced the oxigen sensor 1 and still got the problem

Is that what it call a sensor

Can I ask you a question

I don’t want the car to stall soon as I put into reverse

( I drive 73 Ford station wagon, I have no problem with it,ha ha ha!)

My car hesitates go accelerate is that the main cause I got all my cats cutt off please help.

In maruti omni van where they tite the sensor

I’m getting Error Code P2198 & I think it’s the Oxygen sensor on bank 2 sensor 1 because I have a rough idle, it turns off at random & even when i start it sometimes it just dies out, then it smells al lot like fuel & you also feel some vibrations on the car so that’s why I think it’s the Oxygen Sensor but what do y’all think?

P1163???

What about Po420

Boss how can i solve P0420 in Toyota Prius C

Rough idle plus loss of power. Definitely an oxygen sensor fault. Cleaned it and I will give you an update if it works

this is why EV has one less problem to worry about

Cut the cat out straight pipe

Problem solved when you replace MAF sensor

lol mine have 160k miles on them

ltarieq ale aljana din al'islam (the secret of happiness) (ashhad 'an la 'iilah 'iilaa allah wa'an muhamad rasul allahi) ( أشهد أن لا إله إلا الله وأن محمد رسول الله) mn fadlk lookin 'iib din al islam

I don't think oxygen sensor do to car stall lol

Seek Jesus! He’s the way! The truth! And the life! Repent for the Kingdom is at hand!

I hate BMWs