2007 Volkswagen Jetta 2.5L- P0036 Oxygen Sensor B1S2 Heater Malfunction-Open Circuit

working on a 2007 volkswagen jetta with a 2.5l engine, customer complaint is a check engine light, the trouble code stored is a p0036 and is for the downstream o2 b1s2 heater circuit and guess what.... the o2 was already replaced! I hope you guys enjoy this video and thanks for watching.

[@montuam]

I wanted to tell you that your help was very important to fix a Jetta over here at the shop, well appreciated.

[@TIme2BelieveInMe]

Gotta say definitely the best true diagnostic channel on KZbin , you my friend do a very thoughtful and well researched circuitry flow path. unlike some who see the first code and start changing things and swapping parts without the proper leg work and diagnostic procedures. A huge fan of your workflow and your knowledge of the scope, wave forms, circuit diagrams, and the things some mechanics shy away from at times. Love the channel!! Have learned from it and used it in my own work! Thanks

[@PositiveLeadDiagnostics]

Thank you so much Tosh

[@em-performance2016]

Excellent work. That's what a mechanic who knows his stuff & is not lazy to do real work looks like. I have the same 2.5l Jetta and have a p2237 code for the upstream sensor & I had already replaced the sensor & checked near wires, but code came back. I took it to various so called electrical shops and all they could do was scan the codes which I already did with my cheap scanner. Another guy hooked up his expensive scanner but didn't want to do any work just told me it could be the wires between ecu & o2 sensor hidden inside, or a bad ecu, and that it'd cost a lot of money. Thanks for nothing, I actually needed someone to diagnose the circuit and wires, not tell me to go to the dealer. This video is great that I now know where to check the hidden wires for damage before I go for ecu diagnostic or replacement. Thank you.

[@yolandastewart8474]

I love the way you thoroughly diagnosed the car. Excellent job.Very impressive.

[@Jeff-pb5lc]

Just figured out a similar problem with a 2012 tiguan, i had no clue where the 3.3v was coming from. Thanks for explaining how that works!!!

[@bassman5066]

Thank you thank you thank you for such a detailed video. I am chasing after this code on one of my cars and I believe you set me down the right path along with showing me exactly what to expect and what is normal at key test points in the system. I have all the factory VW documentation and stuff like this to supplement it goes such a long way. Keep up the good work!

[@stuzman52]

Just goes to show you Tom that whoever replaced the O2 sensor never did any diagnostics and never did a follow-up on the repair. Great work and I was a little skirmish when you started sticking your hand in that nest :)

[@alexbermutant28]

Wow, I don’t even have this issue but I am fascinated by how easy you made that look. Kind of gives me some confidence in myself that with proper equipment and a little patience sneaky issues likes this can be resolved. Thanks man. My only problem is, I can’t afford nor would I understand a scan tool of that caliber. 😆

[@jgeorges3061]

AWESOME TOMMY,good video and info as always keep'em coming!

[@EXOVCDS]

Another good one... keep'em coming!

[@richardmcwhirter9396]

nice work well done,thanks for sharing

[@andrewk778]

Always an interesting video. Thanks for sharing.

[@baxrok2.]

Good one Tom. Thanks for sharing!

[@francoraul28]

made my job easy today diag. a o2 sensor similar problem with a mouse . keep it up your doing great

[@PositiveLeadDiagnostics]

Raul Franco nice! Chewed wiring?

[@stevenjames7073]

Excellent job sir.thank u for sharing.

[@JuanJimenez-cu5ez]

Bro. Thanks for the help. You are a pro

[@lagoSaltoGrande]

Excelent job, and very good know-how.

[@michaelpatosa]

Nice find Tom!

[@nicknicu1787]

Man,you get all these cool case studies! Well done! Thanks for the video! 👍

[@transam8607]

I think this pointed me to the right direction thanks.

[@AJIMPORTS]

Good video, will use this information to fix a r32 i'm working on.

[@nelsonvergara8932]

very nice trouble shooting enjoyed it very much keep up the excellent work

[@markusdd5]

'Never replace components based on fault codes alone.' Even that this is displayed on a professional grade scan-tool makes me question the qualification of 80% of the mechanics out there...

[@seaton95]

thanks well done.another good work

[@pinpointautomotiverepair1592]

Idk why, but every time you said mouse house I laughed. Great vid bro.

[@jtnm1746]

Hey tom...and wow ur pretty sharp...and no gloves diggn into the mouse house...lol...Awesome Tom...keep em comn...

[@philh9238]

i had an s10 2 weeks ago got towed in. a burmese python was under the hood when i opened it. it was definetly a surprise

[@fermatos]

Excelente!!! Me ayudò mucho, Gracias.

[@astronautdolphindetective6908]

amazing work!

[@crank3646]

You are fearless for not using gloves in this mouse nest

[@billyr9840]

Nice Tommy !

[@Pablo_Automotive]

Thanks Tonm ☺

[@naushadali95]

Great video.

[@frankbrown542]

Great video

[@CHIBA280CRV]

Excellent thanks

[@hectormorel2803]

thank you from Lear u good men smart damn u lucky vw/audi

[@tanovw]

You wouldn't happen to know where that fuse is for that o2 sensor would? Great video btw

[@morejavi]

Pretty Fin sweet. You are awesome

[@NCPDFSB]

good one tom, customer did not complain of a smell?

[@alecgreenwood3546]

A wolf I'm the mouse house nice one Tom,

[@Idtelos]

I had an issue with the downstream sensor. I got P0143 trouble code. Check live data, it had a close loop fault and the voltage on the downstream sensor was over 1 Volts where it should be around what you have there (0.44-0.45V at idle). I then checked the fuses and voltage continuity on circuit, those were find. I swapped out the that downstream sensor and code and subsequent MIL light cleared.

[@kobihackson3205]

Good work tom i loved watching your videos, how i wish you are in Ghana 🇬🇭 Bro i have same jetta when is cold and i start it engine started shaking and goes off unless i accelerate to warm the engine. But it doesn't happens when the engine is warm. can u pls help me

[@bobbobby5724]

Vw , mouse always wins ha ha. Well done Tom

[@PositiveLeadDiagnostics]

the mouse wins and then we win!

[@pistonrepublic1992]

pistonrepublic.com/users/svt_man/posts/of-mice-and-men-and-volkswagens You ain't kidding. A mouse took a 70 mph joyride in our editor-in-chief's Jetta. Happened to Justin Hughes too! www.thedrive.com/news/19703/a-mouse-hitched-a-ride-in-the-vw-jetta-smyth-ute

[@philh9238]

just one question. why did the pid for the rear o2 heater stay off? but on the scope it was pulsing?? thanks!

[@jinalshah3841]

I have 07 jetta 2.5. There is two ac line that comes from firewall. One goes to compressor and 2nd one goes to condenser. Is it a top one that goes to compressor and it has low pressure point on it?

[@dezblyan5125]

no wire can hide from you can it?

[@NewLevelAuto]

It's a fuse! Wait I should watch first

[@NewLevelAuto]

Well alright it was Fouse, not a fuse but similar in nature 🤓

[@kwekuboakye]

Can you please show me where the speed sensor on this car is. I have a p0720 fault code

[@dejanmeki]

I got same code today for the first time at 261K on VW Touareg 3.6fsi....probably same issue, I hope won't affect driving

[@jhenson5168]

I noticed on my downstream O2 sensor that my heater wires the insulation was snapped open they were short circuit in each other. And blowing fuse 43, got that taped up I haven’t bought a new sensor. Fuse 43 doesn’t blow anymore everything on fuse 43 works, but now I still have the bank one sensor two heater circuit malfunction. When the car is cold the check engine light comes on, when it’s an operating temp and I clear the code. I drove it for 37 miles, and no check engine light. Is my computer damaged or do you believe I just need a new O2 sensor

[@ozzstars_cars]

Doing it right

[@SuAmigoElilegal]

I have a 06 Jetta 2.5 I'm looking for the input turbine speed sensor

[@joseminano]

I'm working on a 2007 VW jetta 2.5L... I get a code P0147 O2 heater circuit B1S3. I tested the resistance its 8 or 9 ohms and I also see a pulse width ground coming from computer. I cant rid of the code.

[@brettmerchant748]

I would have skipped all the computer testing and used my X-ray vision to look through the cowl panel and once I saw the mouse nest I would have assumed the mouse chewed through a wire and repaired it w some electrical tape.

[@17Shkurt2008Pavarsia]

Man I'm having the same issue with bank 1 sensor 3. Although it's getting power and the ground is good but the heater circuit wire is not functioning right. It keeps throwing code p0147 and p0146. I got under the car and disconnected the o2 sensor wires. I kept bending the wires left and right and I followed that same exact harness you showed which I looked for any cuts or mouse bites but didn't see anything. After putting the windshield rain tray back on code p0147 is gone now but I'm still getting p0146.

[@PositiveLeadDiagnostics]

You should have some kind of bias voltage on the heater circuit ground wire with the sensor unplugged. If you don’t have that, do the same check at the computer with the sensor unplugged to see if you have the bias voltage there. maybe there is a break in the harness somewhere

[@turbozobb]

Tommy is this the same Jetta which did not start "no power to ECM"?

[@PositiveLeadDiagnostics]

Nope. Different car

[@Airman..]

I am Just curious Tom How much would the dealer charge the wonder for your fix? Thx

[@tucoramirez6678]

Dealership will charge waaaay too much! I have received quotes from $380 to $573!

[@frankgonzalez24]

I give a 3 on a scale of 1 to 10 for the repair difficulty. 3 because many only have a multi-meter and cheap code reader as diagnostic tools.

[@PositiveLeadDiagnostics]

...and those are the only tools you need

[@rahrah8076]

Frank Gonzalez you can do so much with a basic test light,multimeter,cheap code reader..it all depends on you’re skills..and learning capabilities..sometimes you can only do so much then you’ll need a high end scan tool plus a scope.

[@elgallopeleador5672]

Same vehicle same problem sencor i have ...p2178 its the code i have and it said its the 02 sencor bank1....

[@greatcesarsghost]

I heard they have 3 sensor .. upper .. middle.. ( before cat ) and after cat ..

[@Moneymeham]

Couldn't you just do a continuity check on the wire where you plugged it into the back of the computer, To the end of the plug where the o2 sensor plugs in?

[@PositiveLeadDiagnostics]

Not really my preference. And it wouldn’t be my first test. I would rather look at voltages and voltage drops. Not really a fan of resistance/ continuity checks. But to answer your question yes you could

[@franhernandez9317]

i love youuuu

[@Jettrap505]

Chances are I damaged my 02 sensor when I guted it my cat

[@cemcelik1583]

What is the cost of this Job in America?

[@tucoramirez6678]

$573.95! I have an O2 problem code. In January 2019 I got a written estimate from a VW dealership just outside Washington, DC, of $268.95 for the new OEM sensor alone. The diagnostic is another $175 (if I skip their diagnostic scan, they will not guaranty anything if the car continues to throw the same O2 sensor code after the new sensor is installed). Note: another professional mechanic with 25 years experience has already used a very high end, $5,000 PROFESSIONAL Diagnostic machine which indicated I have a bad O2 sensor (Bank 1 Sensor 2). Plus 1 hour of dealership mechanic labor will cost me $130. This cost is assuming that THE O2 sensor is bad & needs to be replaced. By comparison, I can buy an original OEM BOSCH Sensor online for $120; borrow or rent a crow's claw & a ratchet tool from AutoZone for free or for less than $20 & change the sensor in less than 30 minutes. Moral of the story is this: Doing any work on your car at a car dealership in America (work that is not covered by your car's warranty), is the same as opening your window and throwing money out of it. They will rip you off.... every time!

[@rahrah8076]

Tuco Ramirez I would only use oem o2 sensors..the aftermarket are crap

[@cardoc2477]

mouse keeps us in work, more wiring issues.

[@PositiveLeadDiagnostics]

yes they do, the mice are my friends :) lol

[@davidgoliath982]

them rodents are as much of a p.i.a. as some people! that comp. should have had a home somewhere else. I really have to wonder about some of these engineers. they do have limited space but someone needs to reassess priorities.

[@aaronreihl2581]

das Maus Haus

[@Hotdogsdownhallways]

Hello