2004 Volkswagen Touareg 4.2L- Stalling, P0171/P0174 System too Lean Bank1/Bank2
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- Опубліковано 17 вер 2024
- working with PSK Mike on a 2004 vw touareg with a 4.2l v8 (non GDI), customer complaint is the veh will start up and run and randomly stall, the veh has 2 dtcs stored p0171 bank 1 system too lean and p0174 bank 2 system too lean, this veh was at Mikes shop a few days before with 2 vac. leaks that he repaired, there was no stalling concern before, I hope you enjoy this video and thanks for watching
![Engine Fault Code P0171 - System Too Lean Bank 1! [Symptoms, Causes, and Fixes]](/img/n.gif)
Good confirmation of a bad pump... and the "smacking of the tank" (to wake-up the pump) was a nice touch to get on camera! =)
right!! that was awesome that we were able to show that, thanks for watching!!
Thank you guys for posting your diligent work. This teaches.
Good job ,I might have gone to fuel pump after fuel pressure test cause im a little behind on the tech,...thank you for filling in the blanks, Roy
Nice diagnostics guys! You guys seem to try and do things right, so you've earned a sub from me. Keep up the good work!!
Awesome video man! Crazy the way they designed this fuel system, but no match for you guys! Great waveforms, scan data analysis, and overall immersion in the procedure. Looking forward to your next victim!
haha thanks I'm glad you enjoyed
good diagnostic. amigo. exselecte
thank you!
Great video guys. I like that you put yourselves in it and that personal touch. Also, nice waveform captures. Thanks!
thanks, yeah that way you know its me and not Scanner Danner :P
Not sure if you're still responding to messages but I've got the same problem.... Poor readings from 02 sensors... Many I saw who thought it was a fuel pump ended up having the issue returned in a week or so..... When I couldn't get mine to stay running I pulled the 404 relay out and the vehicle ran perfectly the 35 minutes home at 60 mph... Not a single stutter.... Everything great.... Currently sitting until I figure it out...... Why would it run perfectly without the 404 if it was a bad fuel pump... I thought that relay controlled them.... What am I missing gentlemen?
Great video guys. I had this same problem on a Porsche Cayenne which I believe has a lot in common with the V8 Toureg? On the Porsche, if you pull out the main fuel pump relay, the car has a redundancy strategy which makes the other pump run continuously. Useful for a testing aid and also might save your customer on a towing cost if they're smart enough to handle pulling the relay out. Keep up the good work guys, appreciate you taking the time to video these interesting jobs. Makes life easier for the rest of us and gives us confidence to go ahead and do some testing.
same strategy on a Porsche too, nice, pulling the relay would have been a good test, and that is a great tip to save on a tow bill, thanks for watching!
Pulling this relay on my 04 v8 Touareg is what got me home the other day.... Was having the same issue, ran under a 1/4 tank just fine but if I parked on a hill it would stall after the transfer pump cut off and when I put just 10 bucks in it to get me home that took it slightly over 1/4 and I couldn't make it more than 2 minutes without stalling..... Tried to limp home for half hour and finally remembered reading about the relay the first time I experienced it...... Ran perfectly fine..... Been sitting for two days since I got home waiting for me to figure it out .......
I was getting 02 sensor fault codes so I was leaning towards the upstream sensor or possibly the fuel sending unit...... Everyone I read or listened to who went with a fuel pump had the problem come back within a week, sometimes 2....... Don't want to waste the money..... Did the fuel pump solve your issue permanently?
Nice haircut man. Almost didn't recognize you 😎
Thanks for the cool video. You 2 make a great team.
I miss my hair!!
Great video guys I would have checked the current waveform for the transfer pump that will tell you a lot about the condition of it. I know that you recommend changing the transfer pump, but if the waveform looked like shit from missing bars, its a guarantee that the pump will fail soon and tell the customer that, but if the wave looked great really don't need waste 400. I know that there are other ways for a pumps to fail but 99% of the time its the motor that craps out.
Again great video and love the foreign stuff!
JOHN HUFNAGEL we did see a healthy waveform from the secondary pump but the recommendation was mainly due to needing to unseat the transfer pump module to disconnect the fuel line from the secondary to the primary during replacement that makes you kind of want to kill 2 birds with one stone . However we did 100% confirm the failed component so we did make a recommendation ....but completely related to the customer when they decided to just do the primary pump lol . I smelled like fuel for 2 days ! Lol
I would rather smell like fuel than smell like gear oil..Lol
JOHN HUFNAGEL never a truer statement made sir !
Real good Video. Confirm the Problem first then smack the Tank. Well done! I would however not recommend to change both pumps waveform and amperage on that transfer pump looked good to me when you checked.
Loving these VW vids. Excellent work guys.
thanks for watching I'm glad you are enjoying
Awesome man! I believe scannerdanner has a vid on a Phaeton with the dual pumps and the strategy is to run off the transfer pump on start up. VW are real " geniuses " with the fuel pump prime when you open the driver's door and if the door luck switch is bad the car won't start. Jeez! You gotta give it to those engineers what they come up with after a bad sleep filled with nightmares... :)))
yeah strange strategy (as always) what else is new lol
Hello car 2005 2.5ddi diesel fuel is half tank less and if the left door key is not working, could it be related to it?
This is the first time I've come across your videos and love the format the way you both work together, gonna subscribe and start binge watching now, thank you for the upload .. Andy
Good diagnosis. Not sure I agree with replacing both pumps as the secondary one only runs for a few seconds so its life expectancy will be very different. The tank does not need to come out either..
the secondary pump runs for 30 seconds on initial start up, then only runs when needed (high load I assume), only reason I suggested both was because you have to pull both out when replacing, before I knew the prices too
Great video. Really enjoyed this one, your best work yet.
Thanks guys
Nice !
Thanks for great video like always
I always feel happy with your videos......
Keep it up man...
Great Diagnostic. Keep it up.
thanks for the support, will do!!
This is golden! Where are you guys located? I have the same vehicle with the same problem. But my transfer pump (driver side) appears to run constantly. I've unplugged the primary pump (passenger side) and the car continues to run. I've read that the transfer pump should only run for priming/starting and then switch over to primary. But with my primary not running, I'd like to know why the transfer pump continues to work.
new to your channel! awesome fix!!
Hi there was the same situation in a video with a Audi Quattro the transfer pump cuts off after a pre determine time after the car stats I think that the main pump has a succion effect but I think that the transfer pump only runs to make sure the main pump doesn't start dry and looses suction Yvan at motoyam did a video on this it was very similar issues.
Good job guys
The problem of non-response throttle Touareg r5
good job
hello guys , its good news,
im trying to solve my lean codes and you might guide me into right way.
thanks
Hey Tom and Mike..Nice to see you both branching out from the Danner tree of knowledge. Great work on the Diagnostics too. I'm just wondering tho, Looking at your current waveform on the transfer pump, Is the 11 amps to high in spec and that's the reason of recommending it to be replaced as well.? The wave form looked great otherwise.
Keep up the great work and vid's too.
Cheers
it was suggested because to replace one pump you have to remove both, also I didn't know the prices when I said to suggest both, thanks for watching
Ah..gotcha. Can understand that one. labor vs parts price This time the parts price won the debate.
Keep the vid's coming, I'll keep watching. Later
great diagnostics thanks guys
absolutely, thanks for watching!
Great job guys!!!!!!!
Great video! Same issue i had! Subscribed!
Most likely not the fuel pump. On the primary /passenger side/ there is a screen on the bottom that gets clogged and can't maintain the pressure. I had the same issue. Really the screen needs to be cleaned and not replace the fuel pump.
This was 100% a faulty fuel pump. We had no amperage on the primary pump which means it was never on. And you could clearly see fuel psi dropping was directly correlated to the transfer pump shutting off when the primary should take over.
Hi, which screen is that? I'm having same issue! Changed fuel pump countless times and still having same issue in my 2005 V8 VOLKSWAGEN Touareg
Tim you better get back here and let us have more info about this screen
@@mrsimsimma what do you want to know?
@@newcreationeconomics8398 hi, when you pull the fuel pumps out of the fuel tank. On the bottom of the plastic housing is a screen. The filter only filters the fuel going to the rail. The screens keep the partials out of the motors
DiagnoseDan told us in her educational video that the unit of wideband sensors should be in amps not in volts, in this car you working with wideband sensor but the unit in volt ! Can you explain that for me please..
Awesome video guys!
thanks
how does this ugly amp waveform come into being? which of the internals of the electric motor could be bad?
excellent diagnosis by the way.
nice video.thanks & happy new year
Happy new year!
Had this exact problem in my 2004 Touareg V8 and had the main pump (passenger side) replaced (10/2016). The transfer pump (driver side) was working fine at the time so I chose not to have it replaced because of the cost. Now, when my gas level gets to about 1/4 full I experience the same stalling/car shutting off problem. Doesn't happen until the fuel level drops to about that point. I assume the transfer pump is now bad. Of course, I want to confirm that before incurring another big repair bill. Nothing is cheap or easy on this vehicle but when it's running well it's a dream. Do you think I'm guessing right on this? Thanks for the video.
hi diesel 2005 2.5t have the same problem in the vehicle how did you solve it?
Hello Bro, please did you finally get a solution for this?
I'm experiencing the same problem and my mechanics keep telling me it's fuel pump issue.
Secondly, is there any difference between a fuel pump for VW V8 Touareg and a V6?
And can someone use a VW V6 fuel pump for a VW V8 Touareg?
Did you guy replace the fuel filter ? On some Volkswagen the fuel filter is in the cover that caps the hole in the fuel tank one of them comes to mind is a 2006 passat 2.0 l turbo engine
Mike replaced the primary fuel pump only, I don't remember but I think pro demand said it was a part of the pump? I could be wrong, on start up both pumps run, the transfer pump runs for 30 seconds, then the main pump takes over, and the transfer pump will only be activated when needed, probably under high load situations
At 6:08 in data group, what does the Diagnose Fuel Supply do?
Hi Tom, awesome vids, since you work on vw a lot, I have a question for you, we have 01 eurovan in our shop, no crank, found out that no voltage coming from fusebox that feeds pnp relay, so relay can't pass current to starter solenoid wire. Also ecm not providing ground to fuel pump relay. Do you know if fuel pump should prime only when cranking or can be primed with ignition on? Thanks!
Thanks for supporting! I am not 100% sure but I want to say it should prime when the key is turned to on position. I could be wrong on that. I have not worked on a lot of those. No power coming from the fuse box and no ground control to the fuel pump relay? What style fuse box is in that? Is it similar to mk2 or mk3 fuseboxes?
I want to say that fuse box looks similar to MK2/3 (according to google) it's located under steering wheel. The way that's setup is that PNP relay should have constant power from fusebox. According to diagram it should have constant power from TV2 (terminal 30 b+, i assume just straight battery power) and it doesn't have anything at the relay, but i can't find this TV2 connection anywhere on the fusebox to backtrace. And besides that we found that ecm doesn't provide ground to fuel pump relay (checked at pcm connector)
Maybe the ecm not grounding the relay is an effect and not a cause. Try this link. Let me know if it helps www.a2resource.com/electrical/CE2.html
ill look into that and see if i can brainstorm some ideas, thanks!
SPD Parts · I had an 88 VW Golf GL 4 speed
I remember when i used to stand still sitting idle for about 15, 20 minutes. I could hear a small whining noise coming from somewhere under the steering wheel dash. Later on i started looking for that noise.
I found out it was the fuel pump relay. It would get considerably hot. I would check to see the if the fuel pump relay is getting enough voltage. Check the proper ground on the relay going to the ecm. Or maybe the fuel pump relay has to be checked and or changed completely.
dang cut the hair man. and the beard good diag man the channel is awesome
I know!! I do miss it though! thanks for supporting!
I think I watched your video where the car also run on 0.5bar.
Nice.
Thanks for your Video. Abo for you.
why replace both when the current trace looked text book for the transfer pump ?
it was only a suggestion due to the fact that when removing only 1 fuel pump you still have to take both out, but that was before I knew the prices of the pumps, Mike only replaced the primary pump
Niceeeeee !
Why change the transfer pump when it doesn't run all the time, so it's done less work than the primary pump.
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Other than a concern of the transfer pump over working itself because in the logic it stated it runs on start up and " as needed" . Though it was really needed when the primary died and did not contribute! lol .. the biggest reason to suggest killing 2 birds with one stone here is that you have to access the secondary pump on the Other side of the Tank to disconnect the transfer line so you are 80% into the secondary pump replacement . Of course the tank was 110% full too !
Does any one know what psi the fuel pressure is supposed to be?
u chopped your hair off a
I know!! it will grow back hopefully lol