VW GDI LIMP Mode AFTER Repairs?? (P0092 - High Pressure Fuel Pump Circuit)
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- Опубликовано: 26 мар 2024
- A local shop is FRUSTRATED with this 2015 VW Golf TSI.
It came in with the connector SMASHED on top of the High Pressure Fuel Pump.
They replaced the pump (Bosch) and connector, but it's still throwing a
P0092 - Fuel Pump Circuit Fault! WHY??
They cut and spliced some more wires, but this VW is STUBBORN...
Let's gather some hard DATA with an OSCILLOSCOPE, and see why this ECM is not happy with the replacement fuel pump. The results will blow your mind!!
IVAN'S PICOSCOPE WAVEFORMS:
drive.google.com/drive/folder...
THINKTOOL PROS:
www.amazon.com/dp/B08XXWHQVJ?...
Enjoy!
Ivan 
Авто/Мото
I've been in limp mode ever since I turned 70 but my vehicles run great thanks to you Ivan for everything I learned from you 😁
Ps I did buy a cheap two channel scope last year and solved a few problems since
thanks to you I know how to use it. now I have a newfound enjoyable hobby in my retirement
Thanks Ivan just about watched every vid you made since you were a kid 😂
Having an enjoyable hobby means a lot! 😁👍
ditto (age), ditto (2 channel) if ya really want to have fun, get Ivan’s pressure transducer 😂
Yes sir, watching Ivan work is like going to school. I still have a lot to learn but am haveing a good time doing it. I would like to get a scanner but I only have a, what is it a 5 giga hurts computer. Not sure I might need a faster laptop also, not ready to spend as much as I would need to to get a 2 channel Pico. Anywsy Ivan is the greatest.
@@carbie5614
I bought a hantek two channel for like 70 bucks it works for what I need
Did a cam crank retard on my 97 GMC with it turned the distributor until the Waveform lined up the way it's supposed to
😂
This is off topic, but I have to say that the commenters for repair videos done by experts like Ivan and Eric O are so much nicer and civil than commenters for tuner videos. I tend to get PO’d by all of the rude comments for those videos, but here everyone is supportive and nice. Well done, everyone.
Bosch aftermarket stuff is sometimes counterfeit. I bought o2 sensors for my S10 online, correct Bosch part number. Did not work. Went to Oreilly's, bought their Bosch O2 sensor, same part number, twice the price, construction was a little different, and they worked. I did a comparison video of it on my little microscopic YT channel. I always look forward to your videos Ivan.
Yeah counterfeit parts online is a common thing.
Could have been a factory reject being sold as good.
Let me guest get from Amazon ?, you've been better off getting it from RockAuto however you are correct they seem to be getting counterfeited just like NGK and NTK and other brands to.
Got counterfeit Denso spark plugs for my Highlander from Amazon. They looked amazing. 20k miles, tips eroded, misfire codes. Suspect not actually iridium, you know, the expensive metal! Bought a set from Toyota dealer, twice the price - but they’re gonna go 120k+ miles… counterfeits are difficult to spot nowadays…
Same exact experience with a temp sensor. Cost almost twice as much at oreilys , but it worked perfectly
Thought I'd have a look at your comparison video, Johnnie - but it's impossible to find.
Ivan's thumb!!! Ouch!!! Great video, nonetheless.
Need to hook up a test-light on that thumb and measure the pain threshold!
Safety Third! @@bbtablet
I thought that healed up quickly as it wasn't in the last video he posted. To cause that much bleeding under the nail bed he had to hit, pinch, etc. very hard. That HAD to hurt/smart really badly. I am hurting just looking at it. GREAT VIDEO!
Wow, great job! OEM! OEM! OEM! And you barely got your hands dirty.. Thanks Ivan!
Ivan thank you for providing the Pico waveforms in this video. Great way to do some hands on learning from you. Great stuff!
I believe after several days of parts swapping one might get lucky enough to actually fix the car without a scope. But proofs in the pudding, if you want facts and quick results a scope is an absolute piece to find these kinds of problems. Nice work Ivan
Scope without human brain and system analyze and understanding how things work is just a box.
1 one tool is your brain
@@aivarinno9257exactly! I must admit that I wouldn't turn so much attention to that current draw and therefore I wouldn't find that. Everything looked just fine😂
Interesting that a Bosch pump doesn't work, as this is probably a Bosch injection system (not 100% sure, though). Maybe it's the wrong one or a counterfeit? If it makes financial sense to fake NGK Sparkplugs, it probably is worth it to counterfeit a expensive di-pump.
Good job on tbe diag btw.
I heard a technician saying a long time ago that vehicle diagnostics can only be done properly using a scope and listening to you Ivan totally reinforces the need. Brilliant diagnostics.
What do we keep on saying? OEM ONLY! OEM parts do the job cause they are designed that way!
Good one Ivan!
Where I live customers are rarely willing to pay for OEM parts😂
I appreciate how you show that cars aren’t just “black boxes” if you have the right tools. With a scanner I now tackle the simple repairs myself and even if I take it to the dealer - I have a good idea of the problem beforehand.
It's always nice to know beforehand what's wrong, BEFORE the dealer hooks up his diagnostic tools to your wallet! 😅
I used to get shafted every time I had to smog my truck. Then I got a used exhaust gas analyzer from a closing shop. Boy, they sure changed their tune when I said, "Nope! I literally just had the truck on a gas analyzer... keep your low emission tune up!" Obviously California.... Those were the days when nothing passed without a "Tune up". 😉
Trust but verify your test equipment AND your replacement parts. Should have been unnecessary but this is where we are nowadays. Scope and test lights definitely homed in on the issue. Test lights low resistance when cold would have sent someone with less knowledge down a rabbit hole when they tripped a code. Great diag and good explanation.
Hi Ivan... I haven't seen your videos in a while. Hope you are well. I love to watch your diagnostic videos because I learn a lot about how to troubleshoot my vehicles. Please, keep up the great work! Thank you.
Great video Ivan! You can’t beat OEM for these critical parts!
You continue to amaze me. Nice work!
Thanks for the video Ivan.
Super nice diagnostic,very good information and explanation
Excellent diagnostic, Ivan! Not only the scope was mandatory, but also the amp clamp, as this was a current related problem.
Great video. Going from a circuit code to a low-pressure code is the evidence you needed.
As usual...great video Ivan!! very good teaching aid. Thank you man!!😊
Yet another brilliant diagnostic.
Great job finding the problem
Excellent video thanks for sharing Ivan.
Love the substitution method. Nice diag Ivan!
Test lights for the win!
You're right, scopes are essential in such cases. And I owe using test lights like that to you Ivan 🙃
Awesome! this morning before work I watched an old scanner danner video of him substituting a engine mount solenoid with test light to diagnose a fuel pressure fault on an audi and tonight after work I watch you diagnose this vw fuel pressure control issue with a test light. Definetely going to be utilising my test lamps as much as I can.
Great diag bro! Broke it down super simple!
Amazing that you caught the current going over the PCM limit!!!! I would expect that the coil ( like the test lamps) would have a higher resistance after warming up. Weird stuff happens, though. Great diagnosis!
Very good diagnose 💪🏻, thanks Ivan🙏
Amazing, Ivan. Simply Amazing! 👏👏👏
Nice job Ivan!!!!
Fantastic diagnosis!
Admittedly, the scope did prove to be valuable here indeed. But ultimately, it was the varying of the test lights to gain the right amp load for the win. Now you asked, can it be diagnosed without a scope? Obviously, you're shooting in the dark without one. But anything is possible when you put your mind to it.
Anyway, very well done Ivan. And that little test light trick is an awesome tip that I picked up from you a while back and I have been using it in a number of my diagnostics ever since. I can't thank you enough for that one.
Thank you PHAD
Only had that same code about 2 weeks ago in the workshop, once I had monitored at the pcm which was under the screen it confirmed it was the pcm issue, after 2 HP pumps fitted by another workshop. The car was a VW golf btw
Now I will continue watching your case study, as I am only 3 minutes in.
Nice and easy. Nice diag, We had a P0092 a couple weeks ago on a Chevy Colorado, ended up being the PCM after similar testing you did.
Great case study! Thank you.
You are always right without osiloscope nah nobody can find that issue.
I don’t have one but I have learned by you and some others how important osiloscope is .
Thank you sir
This was fantastic.... Wow!
Great case study here.
Data is everything, another great video!
Great job amigo
That high pressure fuel pump looked awfully familiar to me-- because it was the site of a $400 blunder on a 2014 VW Passat. While changing the spark plugs, I lightly pulled on the wiring harness and the plastic connector on the pump snapped right off! I did write Bosch to ask why they put such a fragile connector on this- but they never responded- go figure. I am reassured that others have seemed to do this exact same idiotic move! My replacement to the USA original pump was a Chinese made Delphi one and it worked fine. I will add that the pump in your excellent video is the one for the 1.8. If this engine was indeed the 2.0 , there is a different pump used(on Rock Auto)- which may explain what the problem was. Comparing the old and new parts may have been easier to fix!
Another neat diagnosis!! And still can’t easily let go off the thinktool pros!!😊 Can u pls give us comparison b/n the launch pro 3s+ and the thinktool pros.
Watch these videos even though might never need these skills as I’m driving a 2011 Isuzu D’Max. It is a pretty solid rig.
Learned along time ago, vw only vw parts❤
as always on point
Good diag and fix.
Nice job.
Simple for you maybe. Great job.
Nice video brother.
Thanks!
Ivan you are very clever .
I’ve always said. No scope no hope 👍
Great video Ivan. I’ve come to the conclusion over the years that if it has electronics in it, just go OEM. It’s better than the headache of thinking it’s not the new aftermarket part.
Great video!
I was living this exact scenario with my VW. While doing another repair the connector to the fuel pump was broken. A bosch fuel pump was installed and the check engine/EPC/limp mode saga started. In the end it was determined that the resistance of the bosch vs the VW pump was slightly different.
Brilliant !
That was a good one Ivan, using an equivalent load did the job. A lot of cheap and counterfeit parts on the market.
I like the play along picoscope files. It adds a dimension to a video. I'm using the picoscope 6 software in a linux container. The linux kernel won't recognize my Owon 2 channel plugged into USB, so the next option is a new computer.
Dam good job Ivan that's what happens when you buy 2 bit parts and your right as rain you need a scope and your skills . Sam soup time for sure
Ps happy Easter.
having test equipment and using it makes working on cars very easy , people over think things and think the worst so they guess , information, common sense and logic goes a long way, its not a race and think things through learn the system and you will get the result you are after , Happy Easter
Yup. Just finished watching. To be honest i see this a lot. Being that this is what i do for a living. Aftermarket parts these days are really bad. I just had a Land Rocer yesterday that had codes for turbocharger boost control circuit A. Well the first thing i found is that the customer installed a boost control solenoid from Amazon. Installed an OEM solenoid......but still not boosting. Checked wastegate flap = ok. Checked wastegate actuator = ok. Checked solenoid again via bidirectional control = ok. Checked turbocharger spinning freely = ok. Finally started thinking "the customer did replace the solenoid once......maybe he didnt connect the vacuum lines correctly". Sure enough the vacuum reference and the wastegate control were backwards. And not Alldata, Identifix nor ProDemand had a vacuum diagram. So that was fun. The interesting part is that the way this vehicle is engineered it cannot tell the difference, in this case between a mechanical fault and and electrical fault. So because the wastegate actuator is a sinple vacuum diaphragm and has no position sensor the pcm cannot monitor it. And it does not have any sensors on the boost control solenoid itself. So essentially it commands the solenoid. Looks at target boost pressure. Doesnt see that target met. And assumes its because theres a circuit issue with the boost control solenoid. A bit of dumb system for a Land Rover. Although it is obvious once looking at the engine bay that its mostly a Ford Escape. Either way the aftermarket is going down the drain these days. Which is a constant battle for us techs because shops want to keep using them. Its simply more practical. But boy does cause headaches sometimes.
Sometimes it's 10x harder to diagnose the initial problem after someone already messed with it and built in MORE PROBLEMS 😒
@@PineHollowAutoDiagnostics 100% true.
Another win!!
Today I got my hands on a 1.8tsi CJSB engine and out of curiosity I measured pump solenoid resistance. It was also 0,5ohm
Sometimes, I think that Ivan can not be human. I wouldn't be able to do this with twenty years of training. Very excellent work, sir!
Dang, my nail is exactly like yours same thumb 😂,good times.
Hopefully they they got rid of those butt connectors and spliced those wires correctly as Audi wires are resistance specific anyway they look horrible, excellent job as always.
Hey Ivan, another great case study. I recall Opus hosting a webinar on Volkswagen and Audi. They strongly recommended going to the dealer to pick up a high-pressure pump. Apparently, the aftermarket option isn't quite as reliable as an OE piece. In this case, training would have paid, not cost$.
Well, oem only works on certain models. As cats don't like aftermarket stuff lol. Hahaha nice video Ivan. Good study on the pico! I'm sure I'll be dead in the water without them!
about six months ago i got vw with gas paddle code was onscope the paddle its was good no issue then i just scope the throttle body and i was missing the signal one tp2 i believed change the throttle body programed it and fixed it
Good video. Ivan always look forward to your videos. Its like a kid waiting for saturday morning to come around soI can watch comics. I will be calling you for replacement of cam in my VW tdi mk5 5speed with 425k originql miles. Only thing changed is time belt every 100k. ORdered the cam, rocker arms lifters directly from VW, Right now the car runs like a Swiss clock. I am still getting 42mpg city/highway. the parts manager says I amhis best customer. Not sure if that is a compliment? LOL Love your videos. learned so much especially about pico . Got your pressure sensors when they first came out. mark No problem with the car. I want to replace the cam at 500k miles.
8:34 what jumps out at me is that the current is going to zero after the initial peak. The computer is doing PWM, but there's no current. The load is open. You're right. You'd never spot that without a scope.
Load isn't open. ECM is sensing the initial high current spike and just shuts off the low-side driver so no more current flows :)
@@PineHollowAutoDiagnostics I had to download the waveforms to get a good look at them. During the bad pulses, there is current during the initial pulse, but during the follow-up PWM, there's none. However, that seems to be due to the computer deciding not to ground the pump. Interesting that there seems to be some kind of control on both lines and not one side always ground. Two channel isn't enough. Three was needed to see this.
@@russellhltn1396 exactly right! 🙂
I had a Tiguan for a short time and it only liked the OEM stuff I got from the local dealer. Once I learned that I only had to fix a problem once.
First thought early on in the video - is the solenoid polarised & the spliced connector backwards??
This shows how you can run better with out high pressure!
It would be interesting to see if you could insert a ballast resistor in series with one of the control wires to see if that would fix the issue.
If I were to go about fixing this without a scope, I could use a test light pretty easily to determine that circuit integrity is good. From there, it has to be the pump or the ECM, and my money would be on the new pump being bad.
Hey Ivan, great video as always 👍🏻
Does anyone remember the one legged Honda mechanic?His videos have been taken down so I can only assume that he has Unfortunately Passed 😔
That was a good find. We've never had any problems with those aftermarket tsi high pressure pumps. So according to ohm's law resistance of a pump solenoid should be actually a little greater for the computer to be happy with it right?
if I remember rightly I had either 7 or 12 ohms from memory on the HP regulator and it was a genuine VW pump. You said you had 0.6 ohms no wonder it was pulling such high amperage..
I have had many issues with non OE parts. I even had issues with non Ford thermostats. There should be impedance/resistance values on that pump n service data.
Funny, That Jetta door open alarm sounds like an EKG machine hooked up to a patient. Sort of fitting . :)
Another test would be to place the test light in series with the pump. This would increase the resistance and lower the amperage but may allow a test of the computer. Or add a 1 or 2 ohm resistor.
Hello Mr Alexander .
I watch the video again and it seem like both of the test lights are connected to the hp pum sensor wires?
Is that rh?
Thank you sir
Oh sweet, a new PHAD video. At least something good came from another sleepless night last night. I'm early for this video.
Great video Mr Alexander
Can you please be more slow of more enfatic how to conect the 5 amp light ?
I’m trying to learn you too fast for me though.
I appreciate you sir .
Hi Ivan,EPC STANDS for electronic power control, in others words throttle body is in limp mode
Pico rules everytime
You're right Ivan That pump is definitely not Bosch
VW Fun today!!
Which version of the PicoScope do you use? The bandwidth and sampling rate seem about right for what you're doing. My old Tektronics analog, non-storage scope is WAY overdue for retirement.
Ok I’ve run into this before. Make sure to use the same brand pump that came out. So if it hitachi you can’t use a Bosch and Vica versa. The resistance values will be off and pcm thinks it’s open circuit. I’ve never had to buy one from VW ever. Always use the oem brand and you’ll be fine. Of course it could’ve just been a defect or counterfeit as well 😉
I wonder if you could have set up your meter to check resistance on that pump as soon as it dropped out.
Hi Ivan, good to see you still using the thinktool pros, i see a 2022 thinktool pros is still available on alibaba brand new in the box, do you think i should take it over the kingbolen k10? I too like the thinktool pros more, would i still have the 2 years free updates starting from now?
It's still available on Amazon! My favorite scanner! 😁
@@PineHollowAutoDiagnostics would I still have the 2 years free updates if I purchase it now?
@@gerardogle1732 of course!
What is the ecrypted bar code on the side of solenoid, like some injectors etc, for resistance values. ??? Or just part number ??
I have one of these in my shop now, 2012 2.0 tdi, keeps throwing a p0047 and going into limp mode. Checked boost pressure(act vs des.) with scanner nothing obvious. Hooked up scope to boost control sol. 1 channel power, 2 channel control. 3 channel amps. 4th channel wastegate signal.
I am getting inductive spike right before i go into limp mode, i moved my amps channel to the battery post and im getting the same inductive spike there as well.
Went to pcm checked powers and ground, checked ac ripple.
Everything checks out ok so far. You have to drive it to get it to glitch. I have some more testing to do but im thinking what could spike a power feed and a 5 volt signal at the same time? Did i mention this thing has aftermarket aftermarket hid headlights.... i may be onto somthing.
car manufacturers: When there is something wrong with the engine we won't tell them what and we will just put a check engine light on. But we will lecture them about saving the environment when they push the gas pedal.
That was great. Not very many shops would have found the problem.
Bosch original seems to be good stuff, but Bosch aftermarket not so good. Or maybe it's Bosch Germany then Bosch everything else.
Those butt connectors on the wiring - there's no excuse for that garbage.
Bosch parts bought from Amazon are often counterfeit Chinesium. Rock Auto or O'Reilly have actual Bosch.
Amazon Bosch specials.
VWs are notorious for only wanting their OEM parts I will not work on them as I have been burned by using aftermarket parts (customer supplied ) & they charge a fortune for their parts (weird shaped hose connector had to buy the complete hose assembly $80 aud).Cheers Ivan.