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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKV-A5 Golf/Jettas

VW MKV-A5 Golf/Jettas Discussions area for A5/MkV Jetta/Golf (2005/2006 PD and 2009 CR).

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Old August 17th, 2010, 15:09   #1
EOTS
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Default Aux Fuel Pump Failure (Formerly:HPFP Failure!)

The main fuel pump on my '09 Jetta TDI (with only 15,000 miles on the clock) went dead while waiting for the lights to turn green at a major intersection during afternoon rush hour about two weeks ago. Strangely enough, the "check engine" never came on. Instead, all the idiot lights came on as if I had stalled the engine.

I cranked the motor 5 to 6 times without any luck in getting the motor to turn over! It did not sound like there was any fuel going to the engine at all! The battery was strong and the starter was doing its job.

Anyway, I had it towed to the nearest VW dealership which, luckily, was only about 5 miles away.

I got a call from the service department after lunch the next day saying that my car is ready to be picked up. Wow, that was fast!

They ended up replacing both the main and auxilliary pumps, the fuses for both pumps plus they replaced the fuel filter as well (just in case, I guess!). Finally, they "reflashed" or "reset" the computer. I hate to imagine what the bill would tally up to be if my car was off warranty! I don't want to know!

I invite TDI club members to share their opinions and experience on the subject (or issue!) of HPFP failure on TDI's. Is this a common problem with the CRD TDI's?

Thank you in advance for sharing your comments with me.


EOTS

Last edited by EOTS; August 20th, 2010 at 09:42.
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Old August 17th, 2010, 15:19   #2
VeeDubTDI
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Glad they fixed it for you. Sounds like the experience wasn't too bad, overall.

Curious that they didn't replace the fuel tank, injectors, etc... I thought that was pretty common when the pump failed. Perhaps it didn't send out the signature shrapnel and ended up suffering from another failure method that was less catastrophic.

Anyway, cheers and happy dieseling!
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Old August 17th, 2010, 15:30   #3
JSWTDI09
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That does not sound like the usual symptoms (or repairs) for a HPFP that self-destructs. I would be curious as to the part numbers they replaced. A 2009+ TDI actually has three fuel pumps and as you described it they only replaced two. I am curious which two. Anyway, I glad they got it up and running in one day for you (this also in unusual for an HPFP failure).

Good Luck!

Don
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Old August 17th, 2010, 15:48   #4
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EOTS,

Welcome! Please do some reading here as this has been discussed to death and you really should be knowledgeable about it. It would help others if you could post your work ticket showing part numbers and diagnosis. Hope all is well for you now.
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Old August 17th, 2010, 15:51   #5
Ski in NC
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Does not sound like they replaced the HPFP. Must have been the other pumps acting up??
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Old August 17th, 2010, 16:07   #6
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Quote:
Originally Posted by Lightflyer1 View Post
EOTS,

Welcome! Please do some reading here as this has been discussed to death and you really should be knowledgeable about it. It would help others if you could post your work ticket showing part numbers and diagnosis. Hope all is well for you now.
+1 on the welcome.

+3 on the please post a copy of your work order.

Alternately, PM a copy to member Silver02 for him to post and/or to include in his HPFP failure tracking thread. the info sure would help many here who are trying to follow the failures.
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Old August 17th, 2010, 19:23   #7
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Forget 'show me the money' Show me the dealer work order showing what parts were repaired or replaced. Not convinced they replaced the HPFP
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Old August 17th, 2010, 19:39   #8
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I am sure he is spending some time slogging through the threads learning something. Give him a chance to respond and post "if" he wants to. This isn't a prove it or else, it is a share the info request. Let's not repeat the other ugly thread.
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Old August 17th, 2010, 19:51   #9
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Yeah who gives a crap if he is making it up. Doesn't bother me any. Just like everything else in life newer doesn't always mean better.
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Old August 18th, 2010, 05:56   #10
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Since the OP references replacing the fuses for the two pumps that were replaced, that infers that the pumps replaced are electronic, which the HPFP is not. Sounds like the OP's aux fuel pump went bad, not the HPFP.
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Old August 18th, 2010, 19:24   #11
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Quote:
Originally Posted by Pelican18TQA4 View Post
Since the OP references replacing the fuses for the two pumps that were replaced, that infers that the pumps replaced are electronic, which the HPFP is not. Sounds like the OP's aux fuel pump went bad, not the HPFP.
I concur. Especially since the repairs were made so quickly. There's no mention of replacing injectors, lines, flushing, etc.

The dealership could have been mixing up the lingo.
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Old August 19th, 2010, 16:14   #12
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My apology in not having responded any sooner!

The following items were listed in the work order:

DESCRIPTION / OPERATION CODE
Technical Diagnosis / 01320026
5051 GFF / 01500000
Replaced Fuel Pump Fuses / 20655599
Replaced Fuel Pump / 20661900
Re & Re Aux Fuel Pump / 20661933
Update ECM as per TSB 2020606-2 / 23602599
Road Test / 01210004

PARTS:
4 N 017 131 12 FLAT FUSE / ASTD
1 1K0 919 050 J FUEL UNIT / A

All of the above-listed labor and parts were performed under warranty and , as such, none of the line items was shown with "unit price".

I could not really tell if the "fuel unit" described above was the main pump or auxilliary unit. Any takers? Comments anyone?


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Old August 19th, 2010, 16:51   #13
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Yep, that's the auxiliary furl pump. It's pump #2 in the system.

Pump #1 is the Lift Lump in the tank that supplies fuel at low pressure to the fuel filter and from there to the Aux Pump. The Aux Pump then sends fuel to the HPSP at 70psi. The HPFP supplies up to ~26,000psi to the rail.
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Old August 19th, 2010, 20:12   #14
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Thanks for the enlightenment. At least now I know which pump had failed on me.

Does anyone know if there is anything I could do to prevent or at least lessen the likelihood of the failure of the HPFP? Would diesel additives help in extending the life of the fuel system?


EOTS
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Old August 19th, 2010, 21:38   #15
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Quote:
Originally Posted by EOTS View Post
Thanks for the enlightenment. At least now I know which pump had failed on me.

Does anyone know if there is anything I could do to prevent or at least lessen the likelihood of the failure of the HPFP? Would diesel additives help in extending the life of the fuel system?


EOTS
There has been a lot of discussion here about this very subject. Some people think that a lubricity additive is your best insurance, others thimk that no additives should be used. Do a search for "lubricity + additive" and you will find a lot of info - some of it useful. I pesonally feel that added lubricating ability can't hurt, but since nobody really knows exactly what kills HPFPs, the jury is still out on this one. You must read all the studies and make up your own mind. All I know for sure is that US diesel fuel does not have to be up to the same lubricity standard as in Europe and Canada.

Have Fun!

Don
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2009 Jetta SportWagen TDI
Candy White/Anthracite; Build date: 01/16/09; Buy date: 02/09/09
Coveted Three Pedal Version, Big hole in roof
Dieselgeek Shortshifter & Panzer Plate (my favorite & my smartest mods)
2MicronTech Pure Flow and Contain Flow CR fuel system modifications
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