Oxygen Sensor Replacement 2002 Ford Focus

[@metislegend2967]

What a great video. I'm a 40 yo single woman and I never thought I'd have to learn how to do all this myself but these videos sure make it helpful! So thanks very much! What nobody asked yet, is how do you locate the back 02 sensor?? It's not under the trunk so I'll need to jack the car or get ramps or something!

[@DaveMedicus]

Thanks. I started learning everything because I didn't have the money to pay someone when I was younger. Now I refuse to pay someone because I have gained the confidence to do it myself. If I screw it up the only thing I am out is a tow bill and some time. lol The second sensor is located directly in front of the engine right after the converter. You may need to jack up the front a little bit to get enough access to it. Even some cheap ramps will work. Both parts look the same so that should help you find it.

[@benrampling812]

@@DaveMedicus is the o2 sensor removed anticlockwise? Because mines really bloody stiff and just wanted clarification before I end up breaking something trying to get it off XD appreciate the video mate

[@DaveMedicus]

@@benrampling812 yes. If it’s super tight you can try turning the car on for a little bit to heat up the metal to help loosen it up. Keep in mind it’s going to be really hot to work with. I usually spray some penetrating oil on it for a couple of days prior to anything like this. See if that helps. Also make sure you have a long bar for some torque on the adapter socket. Typically a breaker bar 18-24” will do you justice if you can get one in there. Also have the socket set up in as straight of a position as you can so that you aren’t fighting yourself.

[@benrampling812]

@@DaveMedicus thank you for your reply, not really sure why I didn't think of turning the car on for Heat that's a good idea. I've got some gloves and sleeves so not too bothered about the heat. I'll have to give give a go. I have been WD40ing it a fair bit and its not moved so I reckon that's what I'll try next. I'm almost certain this is what's causing the car to run bad as I disconnected the plug and ran the car with no difference and I think that's a good sign. Thank you for the reply mate

[@QQ-tf2yu]

​@@DaveMedicussensor 1 and 2 are the same parts? I have to get 2 of the same Part?

[@joehyundaitech7961]

thats why I bought a few inspection mirrors of different sizes they are golden at times like this

[@DaveMedicus]

JOE Hyundai Tech yes they are. Thanks for watching.

[@flycorvus]

High five, pal! My focus is a 2002 piece, DOHC Zetec engine. Just like yours. :-) Thank you for your job and enthusiasm, just what I'm lookin' for.

[@DaveMedicus]

Thank you. I am glad that it helped.

[@christianbulimics4649]

Thank you man! I was sure there was a tool for that, but I didn't expect that simple!

[@DaveMedicus]

Yeah it’s not bad. Sometimes they can be on there pretty good if they didn’t use and anti seize on them. Good luck with your project. Thanks for watching.

[@christianbulimics4649]

@@DaveMedicus I wanted to fix it asap, and everything was closed around here, so here is what I did ... I took a long 22mm box and cut the square socket part and welded it on top, I cut it also for the wire to pass true like your tool lol ... and it worked great! I was fearing it might crack open because of the cut for the wire, but it held on great! ... I wish I could have provided a pic here, but I don't know how lol

[@DaveMedicus]

@@christianbulimics4649 nice job. Good thinking. I’m glad that it worked for you.

[@rnadey]

Thanks Dave great video gives me a idea on changing it now. I have a 2009 ford focus which should be very similar to what you did.

[@DaveMedicus]

Thanks for watching

[@ellisonhamilton3322]

Gotta do mine tomorrow on my 02 Focus. Thanks. Well done video. Thanks for the heads up on the sensor socket. Harbor Freight carries them for about $9. 👍👍👍👍👍

[@DaveMedicus]

Thanks you

[@mistyl1987]

​@@DaveMedicus got a new car so I'm selling my 02 focus, just fixing it up before it's posted for sale. Thank you for this video 🙏💥

[@wildimpo]

I bought a Bosch it has a white plug , is there any difference between the green factory one

[@DaveMedicus]

bigboost Laser I’m not sure different manufacturers often used different colors

[@nardo1224]

Is there a video the change the lower 02 sensor. I changed the upper one according to the video but still got code p2195 which I believe tells me the other one needs replacing.

[@DaveMedicus]

I don't have a video of it but it's exactly the same way. You just need to get under the front of the vehicle.

[@valarmentrout1299]

You are very good at what you do. Thanks for the video 🙂

[@DaveMedicus]

Thank you! I am just a normal guy trying to help other people complete jobs. Thanks for watching and commenting. I hope that this helped.

[@cristianvelazquez9705]

My focus has the code of the catalityc converted below sensor one! I heard there is a way to clean it well by taking out the upper oxygen sensor and spraying sea foam trough the hole of the oxygen sensor. Do you recommend that?

[@DaveMedicus]

I have heard of that as long as its a carbon issue and not an electrical issue. Thanks for watching

[@lindachapman6002]

I have a 2002 Ford Focus zx3 hatchback zetech motor. Having trouble with CV axle Left side front wheel. Then I overheated the motor, I think I fried an O2 sensor. I'm not sure. Trying 😢to find out where it is

[@DaveMedicus]

front of the exhaust by the radiator.

[@TheSlaj4496]

I can't get my heatshield back on lol. Is it important? I have it like sitting on there but I can't get it all the way

[@DaveMedicus]

I put mine back on just for protection but anytime someone puts a set of header on the car there’s no heat shield. I had an issue with mine because it slightly bent putting it back in. You would probably be fine without it but if you can get it on do it.

[@TheSlaj4496]

@@DaveMedicus I was able to get it back on with the help of a friend. What a bitch though!

[@austinupchurch1981]

The oxygen sensor you are replacing in this video. Is it bank one sensor one?I replaced this same one but I don't know if it was the right one because my engine light came right back on after changing it

[@DaveMedicus]

Bank 1 is front Bank 2 is after Cat

[@cognitivedissident9825]

The blue plug on my '04 LR is factory taped back to the loom, and there's no downstream hole in exhaust for a sensor to screw into.. Is this normal?

[@DaveMedicus]

No. It sounds like someone put on an aftermarket exhaust and eliminated some of the emissions. Thanks for watching.

[@sarahgarnett8021]

did you put the goo on it that comes with new o2 sensors?

[@DaveMedicus]

Sarah Garnett mine already had it on the threads.

[@BiffNugemon]

Is there anything else needed after replacing or can I just clear the codes? I have the same code on my 04 Focus SVT and will definitely change o2S1 but my radiator got smashed in so Ill need to swap that as well

[@elijahparker7655]

Just clear the codes. If the light pops up again, run the codes again, check the connections

[@DaveMedicus]

Oxygen sensor is sometimes a generic code for another problem

[@BiffNugemon]

@@DaveMedicus Oh how I've learned. it was just the tip of the ice berg

[@billysanchez6890]

I used a deeper O2 sensor socket to remove the upper sensor without removing the heat shield.

[@billysanchez6890]

Thanks for the video by the way.

[@DaveMedicus]

Jon Doe I believe that you can also get to it from the bottom too.

[@wheressteve]

You can change the upper sensor 1 on a zetec without removing the heat shield , I've done a bunch of them.

[@DaveMedicus]

Thanks for watching.

[@StephenMoortgat]

Do you have the motorcraft part numbers for both sensors?

[@DaveMedicus]

Stephen Moortgat sorry I do not.

[@ptyptypty3]

wow THANK YOU!! excellent video!.. and you described each step perfectly!!..

[@DaveMedicus]

Thank you!! I am glad that this helped you.

[@54321snoopyman]

Excellent i am a backyard much... Finally a no bullshit. Right to the point

[@DaveMedicus]

Thanks For watching!

[@jonathanazcoitia642]

Hi! i got a p2195 code , which is about the O2 sensor , i bought an original motorcraft sensor , but the connector is white color , would that matter? the previous sensor was also green color , , i replaced the sensor but i still have the p2195 code. i dont remeber the part number , so im not sure if i have the right sensor put in ,

[@DaveMedicus]

As long as it plugged in it should work fine. A lot of times when you get codes like this the sensor is just what identifies that there is a problem and not actually the problem. If you already changed and cleared the code and it popped back up you most likely have another issue. Thanks for watching.

[@dbsparks3285]

Would this improve the immisions if replaced mine keeps failing can't seem to get immisions down any ideas?👍

[@DaveMedicus]

It could but what is the reason it's failing the emissions? It could be a totally different reason. When this goes bad you usually get codes.

[@omargonzales3]

How do I now witch senor I need to replay, my error code is:P2195 from Auto zone

[@DaveMedicus]

Omar Gonzales if it was bank one it should be your first oxygen sensor

[@npastran12]

Hi Dave, the mine it's 2000 Ford Focus zx3 Zetec. I bought a Sensor Oxygen with white plug. But muy Ford Focus it's Green plug. Tell me, I Will have issue about? Greetting

[@DaveMedicus]

Not sure you can always just unplug it to check before you attempt the whole project. Different brands have different colors at times. Thanks for watching!

[@npastran12]

@@DaveMedicus cool, thanks, it's MOTORCRAFT white plug, it's new, but I have a mix lean one Time and another Time mix rich, I don't know. I hace my dude with the MAF. Dave

[@scottykilmer1094]

if the little wires on the plug are the same as the oem one, you dont have to worry.

[@npastran12]

@@scottykilmer1094 Thanks friend

[@charlesfoy1613]

does the check engine light have to be for the 02 sensor to be bad

[@BeastmodeBeats]

charles foy no, it could also be a fuel trim issue, meaning the fuel pump relay is receiving too much Amperes, this could be due to a bad fuel pump relay or a short in the fuse box wires. The check engine light will come on if the fuel trim is too high. You lower it by ensuring the relays work properly and that the PCM circuitry isn’t overloaded. Of course the O2 sensors can also cause the check engine light to come on depending on the OBD code you receive.

[@DaveMedicus]

He is correct

[@shanefreeman8164]

Do you need to replace both sensors?

[@DaveMedicus]

shane freeman technically no if it’s not bad.

[@katimira1612]

Hello: If I am replacing the Catalytic Converter (the replacement will have the holes for both the oxygen sensors of both your videos. My question is, will I have to remove the old o2 sensors (I know I have to disconnect them regardless) before I take out the original "Cat" or can I just take out the old cat with the sensors still attatched and then put the new sensors on the replacement cat? Thanks. Also if you know anything about replacing the cat is it necessary to disconnect the egr tube or can I go without doing that? Do you have a "cat" video? Thanks

[@DaveMedicus]

Yes you will have to remove them and replace them into your new cat unless they already came installed. Thanks for watching,

[@kennethfrazee2540]

Thanx, about to attack the '02 Svt. Great little cars.

[@DaveMedicus]

Thanks for watching.

[@charlesfoy1613]

do es the check engine light have to be on for the 02 sensor to be bad

[@DaveMedicus]

If its bad the computer will throw a code because its not working properly. Thanks for watching.

[@jamesharden8615]

I have a 03 zx5 220000 miles. Has been running great but now I have the P0420 code and barely get 250miles to a tank I used to get about 350. Wonder if it's just one or both sensors or if it's the cat also.

[@DaveMedicus]

Cody George most likely your catalytic converter is going bad.

[@BeastmodeBeats]

1/2 inch breaker bar, 3/8 inch socket extension or spark plug socket, OEM (27110) 22mm 02 sensor part ratchet attachment, and a drive extendable ratchet. PUSH FORWARD TO LOOSEN

[@DaveMedicus]

Thanks for the help

[@jebfullerton4841]

U still have that o2 sensor?

[@DaveMedicus]

Actually I do but its packed away somewhere in a storage unit at the moment.

[@kgilkey]

Great explanation. Thanks dude! I got a P2195 error on my 03 Focus. I'm going to try replacing the O2 sensor first. Hopefully that'll fix it.

[@DaveMedicus]

Thanks. I hope that this helps fix all of your problems. I replaced my spark plugs after as well. You might want to pull one out and check them.

[@jonathanazcoitia642]

Hi. Were you able to fix your problem by replacing the sensors? Did you fix p2195?

[@jriver64]

Great job, brother! Subscribed for life!

[@DaveMedicus]

Thanks for the sub! I hope it helped

[@elizabethnowak1213]

My throT has been burning bad. No check engine light. Can't breathe well when using heat or defrost while driving. Windows fog up inside.

[@DaveMedicus]

Sounds like a leaking heater core.

[@markkbackspacer1440]

did you know why ford focus 2003 zetec just have one bank o2 sensor ?

[@DaveMedicus]

markk backspacer it’s only a 4 cylinder.

[@BeastmodeBeats]

That’s exactly right, on a 4 cylinder engine there is only one bank.

[@kennethfuhrer9171]

What part number did you have to get for the downstream o2 sensor? The blue plug one?

[@DaveMedicus]

I actually never needed to change it. 150k and still going strong. All off my codes were cleared with the replacement of just the front.

[@realisticskypearson606]

So the bank 2 sensor is in the back of the car? I bought a universal sensor online. Do you think it will be the right one?

[@DaveMedicus]

Is it the kind that you have to wire in to the existing wires?

[@realisticskypearson606]

The one that I bought says 4 wire direct fit. However now I'm being told that I have a MAP not a MAF and that's what I need to replace.

[@FranciscoSanchez-kx9tv]

I gat PO14 I for for focus 2002 4cl what is my problem?

[@d.j.9961]

Did u get better mileage??? Any power level boost??? Does it run better/idle better???

[@DaveMedicus]

It did run better at idle and i got better fuel mileage. I still have an extra factory one if you need it.

[@d.j.9961]

Dave Medicus I did both of mine (on my 03 focus 2.0 dohc) after ordering the 02 sensors I saw ur video.my downstream one had a smaller head on the on sensor! + a. different design of cut outs on the tip of o2 sensor.After changing them with denso o2's I realize their not right.it was chugging real bad after I changed them.i should of purchased motorcraft.

[@paulaprice3081]

my Ford Focus 2002 is losing power and don't o over 40mph

[@paulaprice3081]

will this make my car run bad

[@_________________7791]

Yes if the sensor reads lean while the motor is not lean at all, your car is gonna be very sluggish with acceleration

[@cristianvelazquez9705]

Do you still have the Focus? I haven’t seen more videos of it.

[@DaveMedicus]

Cristian Velazquez yes I do. I actually haven’t had to do anything to it lately that I haven’t already filmed. The next project is probably going to be part of a stereo system build.

[@419Audio]

Would bad sensors make it stall cold/warm condition but not throw code/dash light? and great vid btw.. very exact..

[@DaveMedicus]

Does it shut of while you are driving or just when you are stopped?

[@419Audio]

drove for about hour...highway..spuddered..like a "miss" but plugs wires coil pck new..no codes but i did let off a/c.. seemed to stop ..got to next off ramp light and nothin..perfect idle no miss drove fine. has stalled on highway..never at idle ..strts just fine. was thinking alternator... it looks "original" . but my dilema still the no code/dashlight ..

[@carlosguerrero4846]

Gracias por la información

[@DaveMedicus]

De nada

[@zachtrapper2398]

How did you solve the connector issue at the end? Did you have to purchase a different oxygen sensor?

[@DaveMedicus]

I only replaced the one that was bad. Still no problems to this day.

[@rabrab3682]

This finished it. Thanks man.

[@DaveMedicus]

No problem. Thanks for watching. I am Gilead that it helped.

[@carterbusby239]

This is exactly the same. Everytime I’m just siting in Park my car runs weird. And it’s shuts off on me twice.

[@DaveMedicus]

I hope that this video helped you. Thanks for watching.

[@stephonlove3183]

Thanks for sharing! You rock dude!

[@DaveMedicus]

Thanks for watching.

[@_________________7791]

if you look up that oxygen sensor is made by ngk. You can buy the exact same type cheaper online.

[@DaveMedicus]

Shshssh Dhshsshsh I got them really cheap online. I think it was like $5 more than autozone or advanced. It was just a peace of mind to buy the factory. Turns out the rear sensor was wrong but everything is still working fine.

[@fuzznutz7182]

One thing you missed is the first thong you should have done is disconnect the battery to reset ECM.

[@DaveMedicus]

I reset the ECM when I cleared the codes. Thanks for watching.

[@fuzznutz7182]

I don't believe clearing the codes resets the ECM. That has to be done by disconnecting the battery and initializing the ECM by turning the ignition switch to the on position. Then the ECM starts the process of relearning.

[@DaveMedicus]

@@fuzznutz7182 my light stayed off and the vehicle ran fine after it adjusted for the correct reading. You may be right but I had no problems immediately afterwards.

[@d-e-a8209]

this is exactly what is happening to my focus

[@DaveMedicus]

Pony Boy I hope that I was able to help you fix your vehicle.

[@d-e-a8209]

Dave Medicus i haven had the opportunity to work on the car but ill definitely check it out as soon as possible, by the way it seems this type of cars always malfunction from this if it's not this its the maf or an injector you should get more into this situation talk more about the problems a ford focus can get its really common for most of the focus must be a factory defect or something.

[@d.j.9961]

Do u still have the motorcraft o2 sensor??? wish I could of spoke with u be yesterday! I ordered a upstream & downstream o2sensors.i purchased them threw rockauto.com. I was thinking about getting the cheapest ones but instead I got the denso's. I should of got the motor craft ones! Did u reset ur computer???????? its very important!!!!!!!!!!!!

[@DaveMedicus]

Yes I still have it. You should not have to reset the computer. it should go off on its own after a couple hundred miles if you fixed it. If you wanted to just have the light off you can reset it.

[@_________________7791]

its made by ngk as a motorcraft brand for Fords

[@viviangeisland8504]

I did not see what direction the r

[@DaveMedicus]

I do not understand?

[@mikeminshew3699]

How much do you want for your O2 sensor do

[@DaveMedicus]

I was selling it for $40. I am not currently able to get to it because its in my storage unit in Myrtle Beach and I am living in Colorado right now. Sorry.

[@tjlovin247]

Awesome my light just turned on and i go code p2195

[@DaveMedicus]

I hope that this helped you. Thanks for watching. For some reason this notification just now came up on my feed. Sorry for the late response.

[@fredray8846]

great video

[@DaveMedicus]

Thanks for watching. I hope that it helped.

[@Mhm136]

Great video man

[@DaveMedicus]

Thanks for watching. I appreciate it.

[@Mhm136]

Np hey i notice you didn't put anti seize compound on your o2 sensors or did you and just didn't show it. I forgot to put them on mine I messed up I should of read all the instructions. Curious as to if it will mess my o2's up?

[@DaveMedicus]

TexasForever89 my O2 sensors already came with anti seize on the threads so there was no need for me to do it. Nice catch though. 👍🏻

[@renegaderader7573]

Part number for the back one

[@DaveMedicus]

Ford constantly change their numbers. The best thing to do is call the dealership parts department and get the part number.

[@renegaderader7573]

@@DaveMedicus for 2002 downstream is motorcraft dy1103

[@renegaderader7573]

Yea i had to look up a repair manual for the year to get oem part

[@joeboogiewiddahoodie6980]

Thanks bro I have a 2003 focus ZX3

[@DaveMedicus]

joseph gibson no problem thanks for watching. Good luck with your project.

[@joeboogiewiddahoodie6980]

@@DaveMedicus thanks she's come along way

[@JtRocks]

Thanks so much man

[@DaveMedicus]

Happy to help

[@ispeakmymind247]

Cool swords bro

[@DaveMedicus]

Thanks man it was a gift from my chain of command when I was leaving the military. Its a Marine NCO sword.

[@ispeakmymind247]

Dave Medicus Sweet Dave. Thank you for your service. I was U.S. Air Force O.D.S. 90-94 search and rescue.

[@Janaeandfriends]

nice I needed this

[@DaveMedicus]

Are you referring to the extra Oxygen sensor? I do still have it.

[@Janaeandfriends]

Dave Medicus 6786414883 text me

[@joehyundaitech7961]

this is where a flex head ratchet comes in very handy I use gearwrench

[@DaveMedicus]

Yes it would be well worth the money for a set.

[@wagnerhenriquedeoliveira2921]

Perfect the explanation

[@DaveMedicus]

Thank you

[@carlacarver1096]

my code was p0135

[@DaveMedicus]

That should narrow it down

[@maximolondonio5039]

Here

[@DaveMedicus]

Thanks for watching.

[@alisalihu3467]

Hi master

[@DaveMedicus]

Thanks for watching.

[@scottykilmer1094]

Lol that oxygen sensor is simply made by Ngk. If you can buy the same aftermarket buy Ngk or pay for the same brand at Ford 300 dollars !

[@DaveMedicus]

Scotty Kilmer I paid like $54 for the factory ones.

[@ispeakmymind247]

"Made in Japan"

[@DaveMedicus]

I think it was actually Mexico lol

[@ispeakmymind247]

Dave Medicus I read "Made in Japan", on the plastic bag, in the video, but so true many of the parts for our Focus are made in Mexico.

[@ispeakmymind247]

My new one I bought, today is N.T.K. and made in Japan. It's a international world, though, even the F-35 Is made from many countries parts and people.

[@Crashcrap]

Gloves?? Really?? Bahaha

[@DaveMedicus]

Davis Racing it makes it easier to jump from clip to clip

[@Crashcrap]

Dave Medicus oh ok I got ya

[@DaveMedicus]

Davis Racing Plus with my job flying helicopters I need to keep my hands looking nice and clean.

[@mikereynolds6203]

Thanks great video, keep up the good work. Saves me finding someone to do it.

[@glassslippers87]

Davis Racing thanks man great video. btw is the 2003 focus the same setup as your 2002