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P0135 P0141 - Explained - Simple Testing Oxygen Sensor Heater Circuit - No special Tools

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In this video we shall be diagnosing a faulty heater circuit of an oxygen sensor. The tests are applicable to all makes and models of vehicle and not just Ford. p0135 p0141
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#o2sensor #heatercircuit #oxygensensor #sensortesting #p0135 #p0141 #specialtools
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SY Diagnostics is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.co.uk
By purchasing an item via one of these links, SY Diagnostics earns a small commission fee from any sale, this fee contributes towards SY Diagnostics purchasing tools and equipment to help keep making videos.
Thankyou.
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Опубликовано:

23 авг 2024

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Комментарии : 91

@madds6678 4 года назад

Like the bulb test I should add that’ll my test routine really, have admit it’s to easy just to throw a o2 sensor in & ship it out but that is such a simple conformation of the power & control side it’s worth the few extra minutes to be 100% certain. Nice one 👍

@markl8190 4 года назад

Always look forward to your videos for their clarity and painstaking approach 👍🏻

@stephynhoy1 3 года назад

These videos are brilliant mate, as a ford tech myself it’s great to learn new tests and I always learn something new with your videos mate it’s great

@SYDiagnostics 3 года назад

Thanks for the comments and support

@JBTaylor86 4 года назад

Very clear easy to follow, nice job Steve 👍🏻

@Bestlookinggrandson 4 года назад

Hi Haven’t lost your touch Excellent as always

@parna121 4 года назад

Another great step by step troubleshooting vid. I always learn something new from you. Thank you for putting in the time and effort to make these..

@soranghafour 4 года назад

Superb approach how to interpret the fault code description and using top method to diagnose it , thanks for educational Video .

@Ricardo_Caracol 4 года назад

Love your videos...simple and easy to understand... cheers from Portugal

@kennypatrol2zero616 4 года назад

Good one steve, when you see a 5 or 6 wire O2 you know th wiring diagram is Key for a repair, and that video was well explained, you made that look easy Cheers for now ;-)

@sitdox 4 года назад

Good to see your videos again mate hope you well and healthy Thank you for nice tutorial stay well and stay safe

@martinguitarhd28 4 года назад

nice quick explanation thats easy to follow.thanks for sharing.

@Johnny-df4di 2 года назад

Thank you for using Forscan in the video been using it since got this sport trac few years ago finally just what i needed for HTR22 OFF Liked and subscribed

@crakkhausetv9827 Год назад

I Love This Video … thank You For Your The time spent I,ve learnt a lot .. My question is how do you test the signal wires coming from the sensor to the ECU with A MultiMeter .. what is the appropriate readings for that..? Cheers

@chesshead3943 3 года назад

Great video, thank you!!! Great troubleshooting, very clear!

@davidgore92 4 года назад

Good work steve, I had same issue with the break out leads il buy pico next time.

@drivewasher 4 года назад

Why does the O2 heater not energise straight away when the engine would be cold?

@SYDiagnostics 4 года назад

Good question and I've no idea. Always found they take 30 seconds or so. Maybe doing self tests??

@danman9017 4 года назад

good video with forscan thank

@electrolineservicegreece8267 4 года назад

Thank you Steve, nice diagnostic video :)

@mohamedshinaishin2822 3 года назад

You deserve a like

@AbbottAutomotive 4 года назад

Oh look at you getting all post and using the test light now instead of a 501 bulb now. 😉 Great work as usual Steve. 👍 P.S. Nice to see some honest feedback in regards to test leads too, I'm glad I didn't purchase them now!

@SYDiagnostics 4 года назад

if i had the 501 to hand you know it'd have been used, i like making my tools, like you do

@craigtinton8036 2 года назад

Wow! Just stumbled across this video, very informative and explained the process clearly. Just subscribed and liked👍🏻

@the_retired_mechanic 4 года назад

Hi Steve great video as always. As you have a great teaching technique that is easy to understand I would have liked you to have shown the best way to test the remaining wiring for that sensor without risking damage to the ECU etc Thanks again.

@SYDiagnostics 4 года назад

Remaining wiring? The video was regarding the heater circuit. Do you mean the remaining wires for the 02 sensing side of the sensor?

@the_retired_mechanic 4 года назад

@@SYDiagnostics yes please

@drivewasher 4 года назад

Hi Steve, Like the video and LOVE the DMM internal amps fuse, that's noe external! Gues the fuses are cheaper than the OE!

@SYDiagnostics 4 года назад

ha ha yes, ive a plentiful supply of standard car fuses for the times you forget and the fuse pops.....Surprising the amount of people who comment on that little mod.

@iankelly2110 4 года назад

good one steve thanks for sharing

@josmith5155 4 года назад

This is the best video i've found on 02 sensor heater circuit testing, and explained very clearly. What's the easiest way to test the signal and ground circuit with just a simple multimeter with no scope, and test lamp? Thanks

@SYDiagnostics 4 года назад

you can test the signal with a multimeter by connecting across the sensor heater supply and the signal, you will get a reduced voltage as the signal is a duty cycle, so lets say the vehicle is running at 14v and you see 7v on the multi meter, then you have a 50% duty cycle.....or, if your meter has duty cycle, then you can go battery negative to signal wire and duty cycle and the % will be shown......a cheap £1 12v led bulb will do the same too and flash like my test light

@josmith5155 4 года назад

@@SYDiagnostics Thanks alot for taking the time to reply. Great stuff. I'm a smelly plant fitter who sometimes wishes he'd got more into your side of work.

@barrylawson9048 4 года назад

Nice one 👍🏻.. hate a slack one

@MobileCarDiagnostic 4 года назад

Good video mate👍🏻

@lawsonthursfield6950 4 года назад

Great video stev...

@SYDiagnostics 4 года назад

Forgot your shout out, but will on my next one

@UnreachableMike 4 года назад

Great approach! Thanks for the video!

@nicoyanicoya7890 Год назад

thanks for the video-- After testing Heater circuit is good then what? how does the "O2 Sensor Heater" monitors gets ready? this is the issue most of the cars currently have. "O2 Sensor Heater Not Ready or the ECM Monitoring O2 Heater is not Complete or Ready. How do we resolve this issue.

@gusmacdonald5370 4 года назад

thanks for test procedure

@shaunblakemore7150 4 года назад

Nice job

@Arnic7 Год назад

I got these 2 codes after replacing both O2 sensors for brand new ones. Do you have any suggestions? I will try to follow these steps to make sure I have those levels of resistance and voltage.

@whenuryoung 4 года назад

Nice easy process

@simonrawle7885 4 года назад

spot on test test and get it right the first time

@hinojosa552 11 месяцев назад

So the control ground circuit suppose to stay there all the time to heat up the o2 sensor right ,? or it goes away after it warms up?

@ukcitizen1158 3 года назад

Quality!

@nickhicks7051 4 года назад

hello what is the oxygen sensor function on a diesel /fuel trms or may be monitoring oxydation cat.cheers for your videos.

@SYDiagnostics 4 года назад

O2 sensors offer the ability to exercise finer control on fueling, DPF, exhaust gas re-circulation rates and boost pressure control, which in turn helps in optimizing emissions and better driveability.

@nickhicks7051 4 года назад

@@SYDiagnostics thank you for your swift reply .more learning about this for me i think.

@sandyande 4 года назад

Cheers Steve, so I should just stick to using my cheap Chinese breakout leads or better still poke holes in the wires!!! LOL cheers sandy

@SYDiagnostics 4 года назад

To be honest the chinese ones have lasted longer and are at least all the same!!.....seems a few aren't happy with these leads

@ryansword2771 4 года назад

Nice video mate,did you get your otc testlight here in the uk?

@SYDiagnostics 4 года назад

despite it looking new, i got it 4 years ago from ebay germany for £18......before they where popular

@chrismangan5621 4 года назад

Good logic based testing as usual Sir. May I ask what interface you use with Forscan please?

@SYDiagnostics 4 года назад

i use the ford vcm 2

@pigeonsil240sx 11 месяцев назад

mines not getting grounded by ecu and im seein 2.5v on the heater ground,im thinking either bad ecu ground and im seeing voltage bled in from bad ground or maybe small short to power?

@mark6rs2k 3 года назад

Hi, just wondering if you can offer advice on the p0138 code,? Eml stays on a few days then goes off. Would it be the sensor or how would I diagnose it? Many thanks

@LukmanHussain3 4 года назад

i recently changed both sensors front and rear to after market ones on my Vauxhall Insignia 1.6 Turbo Petrol 2010. A few days later i've had 2 faults pop up P0141 and P0135 could this mean maybe changing them to better quality instead of aftermarket? any help much appriciated...

@SYDiagnostics 4 года назад

without looking t a wiring diagram i cannot confirm, however, have you a 12v heater supply at both sensors......On this video the 12v supply to the heater was a common feed from 1 fuse

@georgitabov8749 Год назад

Great video. Can you please tell me where to find wiring diagrams?

@SYDiagnostics Год назад

these are diagrams i have made myself to avoid any copyright issues

@AnythingEverythingGh 3 года назад

Pin 5 and 6 mean 12volts power feed and bias 5v PCM control wire right?

@titusoverholt134 3 года назад

thanx mate

@andredompaul 3 года назад

Hi can’t you check the voltage in each sensor by the diag ?

@scottycossie1 3 года назад

Hi, great video. My wife's kuga 2016 2.0 tdci has the same dtc p0135 and when carrying out all the tests the sensor is reading within spec and I have 12v supply at connector, when I check across 5&6 after clearing the code there is what seems no control from pcm( I presume the pcm sends a ground to activate the heater?).. any idea what could be the issue? I haven't got a wiring diagram to check between sensor and pcm. I have pending code there after start up once cleared and swapped sensor with a good known one just to eliminate even though it tested ok with the multimeter. Any help would be appreciated. Thanks.

@SYDiagnostics 3 года назад

The switching signal isn't straight way and can take a short while, you could have a faulty pcm or a wiring issue

@scottycossie1 3 года назад

@@SYDiagnostics yeah I left the light connected and car running for quite a while and it never lit up. I will need to find a wiring diagram and carry out tests from there to pcm. I can't seem to find a diagram online though. Is it common on a kuga for it to be wiring or pcm ?

@SYDiagnostics 3 года назад

@@scottycossie1 not in my experience. Send me an email - details in video description - and can send you a diagram

@SYDiagnostics 3 года назад

@@scottycossie1 sometimes the draw of the heater circuit and the test lamp is too much, have you tried the test lamp on its own?

@scottycossie1 3 года назад

@@SYDiagnostics I didn't have the sensor connected to the harness when I was using the test lamp, I just cleared the code then went into the terminals or the car harness as per your video with the test light and nothing even after running for 5 mins, even tried it from cold. Still no control from pcm. Test light is working fine as I used it to check the supply pin.

@monthirelharrak1529 3 года назад

How do you find the correct schematic for your car? I have been looking all over the place for it

@SYDiagnostics 3 года назад

direct from Ford Etis

@dits108 2 года назад

Would sensor 2 be the same...Or does it work differently

@SYDiagnostics 2 года назад

Heater circuits are pretty much the same. Pin designation will differ

@eternal7_gaming340 2 года назад

Blessings, what if there isn’t a battery voltage going to the connector on pin 5? I have code p0141 for the downstream I installed a new 02 sensor and catalytic converter but the check engine lights still comes on any help would be great

@SYDiagnostics 2 года назад

usually the downstream sensor isn't a broadband sensor and is a 4 wire sensor. You would need to a wiring diagram to work out which wire is the correct wire. My latest video covers p0141

@eternal7_gaming340 2 года назад

@@SYDiagnostics thank you

@Salahaddin_1982 2 года назад

Hello,dear I have Ford Explorer model 2000 check engine light is on the cod is P0141 bank 1 sensor 2 can you tell me were is the location for the oxygen sensor please.

@SYDiagnostics 2 года назад

it will be the oxygen sensor after the catalytic convertor

@Salahaddin_1982 2 года назад

@@SYDiagnostics

@AnythingEverythingGh 3 года назад

Hello Sir I have 4 wire wideband 02 sensor, solving a circuit problem, P0032 KOEO Signal Wire has 12v Dedicated Power Feed has 12v Heated wire 2.2v Heated wire ground 1.8v Where should i hook the test light to check the circuit? Also with regards to your video, what would have been your next line of action if the test light didnt light Thanks

@v4vauxhall498 4 года назад

Hi Steve I have also bought scope leads from this company very disappointed.

@SYDiagnostics 4 года назад

looking as though we aren't the only ones, quite a few others have similar issues.

@gavinmurphy5758 4 года назад

Don't understand bias voltage??

@SYDiagnostics 4 года назад

its a voltage the ecu outputs and expects it to be changed by either being pulled up or down.....like a test voltage

@zzhughesd 11 месяцев назад

P141 Too High P135 Too Low Together On a 169 Panda MK2 Also no driving difference

@sitdox 4 года назад

I know where you get them from me too got a set so too won’t recommend them overall they ok as long as the pin corresponds to lead plug but if pin slightly bigger one immediately leaves plastic deformation in the lead plug and becomes slack as the witches tit 😂

@SYDiagnostics 4 года назад

its a shame that so many others have had issues with them too, i now prefer to use terminals from old harnesses which ive soldered up with bna plugs ....... but they where at work, i fetched a few tools home to make videos with luckily

@sitdox 4 года назад

SY Diagnostics I feel for you it must be tough without the things you love to do I’m in a better position I’m one man band so taking all precautions and keep on working otherwise would go bananas if stayed at home all that time Even went in today as had interesting one 2008 transit FWD 2.2 was running poor could hear PCM cutting engine off to prevent damage read the codes high fuel pressure then fuel pressure solenoid valve And so yes fuel solenoid valve stuck as someone says SORTED BOOM 😂 Anyway I reckon me to going to make my own leads as I go as you say these plugs from harnesses seem much stronger