PDA

View Full Version : FYI - Bad Fuel Pressure Sensor Symptoms


JeepNGLI
09-17-2008, 01:09 PM
Monday I posted up that I had some issues with my car. In the end the diagnosis was a bad fuel pressure sensor which VW told me is a new recall/TSB. So for general knowledge and future searching, here's were my systomps.


Bad Fuel Pressure Sensor Symptoms:


-- On cold start, RPMS rose to around 1600 and boost was around 5-10mmHg instead of 20 or so. Noticeable difference, sounded like engine was reving on its own.

-- Car had serve lack of power, while still be able to boost(in stock mode I was still hitting 15psi, but not accelerating as normal.)

-- At low RPMS, car just didn't want to go. Didn't feel like it was stalling, but close. Lots of hesitation.

-- Using VAG-com, fuel pressure readings (actual and specified) were right on.

It was hard to properly diagnose the problem. I think my sensor was on the verge of failing b/c the morning I brought it in it was running fine but then acted up when the dealership got it.

SOLUTION:
-- New Fuel Pressure Sensor as per VW(might be a tsb/recall). Although they said I needed an ECU update, my software is still on so I left believe I never received an update/wasn't necessary.

I'll post up the fuel pressure sensor part number when I get home from work.

MKvUltra
09-17-2008, 01:14 PM
isn't this in the issues/remedies thread?

doctorgonzo
09-17-2008, 01:16 PM
Indeed, many guys experiencing what they report as "fuel cuts" are actually having this sensor issue.

The old sensor design is susceptible to fuel penetration, and stops sending a valid signal. It will happen to every 2.0T eventually.

There is a RVUTB out for this problem - that's a required vehicle update technical bulletin. It's RVUTB 20 08 03.

This is required by law, as it poses a serious safety hazard. The dealership will fix it and receive a credit. I took my car in, and they didn't give me any grief for my mods. They just did the work, and didn't charge me.

Chris

JeepNGLI
09-17-2008, 01:22 PM
Ah, well sorry for the repost. However, when I posted my problem, not one person suggested it might be the fuel pressure sensor. Everyone jumps to the fuel pump/ cam lobe issues. I did a search and never really found the answers I want. But with the addition of your comments above, I think it should be easier to search for.

MKvUltra
09-17-2008, 01:24 PM
there are alot of donkeys on here

JeepNGLI
09-17-2008, 01:25 PM
ha, I've been on here longer than you. Trust me, I know that. However, there are some very helpful people on here and I wait for them to chime in before I start listening.

julito04
09-17-2008, 01:35 PM
so If im out of warranty they will perform this with no questions asked and not charge me?

JeepNGLI
09-17-2008, 01:49 PM
If its a full recall, I'd assume so. I had a recall on my Cherokee that involved putting a heat shield on to prevent fire in the engine bay and that was mandatory and free. I image if its mandatory they'd have to do it for free b/c you wouldn't want some people being cheap and comprising safety.

itisagoodname
09-17-2008, 01:59 PM
This happened to me too... Installed my APR HPFP and havnt had a problem since.

rbradleymedmd
09-17-2008, 02:08 PM
Jeep...sorry I wasn't able to help out in your last thread...glad you got it taken care of though...

For those that would like the TSB on this...
http://www.geocities.com/nfe100/Technical_Bulletins/2008.07.18_RVU_Fuel_Pressure_sensor_replacement_SA GA_Code_24M5.05.pdf

doctorgonzo
09-17-2008, 02:44 PM
This happened to me too... Installed my APR HPFP and havnt had a problem since.

That's because your APR pump came with a new sensor! It's still the same old sensor design, and will eventually crap out again.

Lou, they may want to charge you. I'd force the issue though - it's a safety hazard.

itisagoodname
09-17-2008, 03:05 PM
How much does a new sensor run? I'll be out of warranty in 1k miles so im pretty much on my own now that i've had all my warranty issues taken care of.

MKvUltra
09-17-2008, 03:20 PM
it should be a recall I was informed by the dealer on my last oil change

itisagoodname
09-17-2008, 03:35 PM
Same here... there was a "reflash" for it... but it never deleted my APR.

I dont know what the hell they did...

doctorgonzo
09-17-2008, 03:39 PM
The sensor is $65 or so and it's the brass thing on the left side of the HPFP - easy access for a DIY.

itisagoodname
09-17-2008, 03:49 PM
Hmm, i was confused on it then... the APR pump does not come with it, you have to swap it from your current FP. Mine's been fine since i swapped it onto the HPFP...

JeepNGLI
09-17-2008, 04:03 PM
Jeep...sorry I wasn't able to help out in your last thread...glad you got it taken care of though...

For those that would like the TSB on this...
http://www.geocities.com/nfe100/Technical_Bulletins/2008.07.18_RVU_Fuel_Pressure_sensor_replacement_SA GA_Code_24M5.05.pdf

No worries, it had so many different symptoms.


And yea, their "update" didn't delete my software. One theory of mine is that I received the new VW update in May-ish. If it was the same update, the VW computer may not have overwritten my ECU if it saw it was the same version.

HipToss
09-17-2008, 04:09 PM
Did you have any fault codes?

JeepNGLI
09-17-2008, 04:13 PM
Lots of misfires. No fuel pressure codes, no boost codes, nothing. I even did a fuel pressure log and the date showed the fuel pump to be achieving what the ECU was requesting. I thought that was weird since the sensor should report inaccurately if it was failing, but I guess not. The dealer did say there was a bunch of misfires and some code that told them the fuel sensor was bad. I dunno, I didn't see any codes and I'm pretty good with the VAG...com. But, I guess they knew what to look for.

itisagoodname
09-17-2008, 04:20 PM
I had constant low pressure fuel codes...
---------------
Address 01: Engine Labels: 06F-907-115-AXX.lbl
Part No SW: 1K0 907 115 B HW: 1K0 907 115 B
Component: 2.0l R4/4V TFSI 0040
Revision: --H14--- Serial number: VWZ7Z0F3327267
Coding: 0403010A1C070160
Shop #: WSC 26116 444 85816

1 Fault Found:
012555 - Low Pressure Fuel regulation: Fuel Pressure Outside Specification
P310B - 008 - Implausible Signal - Intermittent
Readiness: 0000 0001
-----------------

Havent seen once since i installed the new pump and cam follower.

kmi34
09-17-2008, 06:28 PM
I had that sensor replaced too but the symptoms were different, my car would die after 10 sec of running...I didnt have any issues before the sensor went bad...

crew219
09-17-2008, 07:45 PM
That's because your APR pump came with a new sensor! It's still the same old sensor design, and will eventually crap out again.

Lou, they may want to charge you. I'd force the issue though - it's a safety hazard.

No, the APR pump reuses the stock thrust sensor.

Dave

Lou_Y2mK5
09-17-2008, 07:49 PM
That's because your APR pump came with a new sensor! It's still the same old sensor design, and will eventually crap out again.

Lou, they may want to charge you. I'd force the issue though - it's a safety hazard.

Go figure my sensor was fine, pump is fine, cam is fine, but the rear pump is not turning on. Still working on that actualy. (Not at the dlr)

MrYS
09-18-2008, 03:19 PM
Brought in yesterday with CEL (codes P0086, P0089, P2293). Car stalled once before CEL and I had fuel cut after ECL was on. Just got call from a dealer, he said it is recall for fuel pressure sensor and car is ready. I'll see how it goes.

JeepNGLI
09-22-2008, 09:07 AM
So last tuesday I had my Fuel Pressure sensor replaced as I mentioned in this and another post, but on Friday right as I'm about to make my way to the Airport, my car starts acting up again. Same thing. The car was running perfect before that with the new Fuel Pressure Sensor. Think I need another one??

dragonsfire89
09-24-2010, 10:12 AM
i have a 06 gti mkv. does the rvutb apply to my car? casue diag said i need a new high pressure senso and i already replaced the low sensor but the high one is mad expensive and itd be great if i got it for free

josein06gli
09-24-2010, 01:02 PM
U on a ko4 If so which hpfp r u using ? kmd, auto tech, Apr ?? I've heard of he first 2 giving problems Thas why I went with Apr rebuild just some insight. Keep us posted.

GTIMKV20
11-18-2010, 08:09 AM
Sorry for the old bump, but if I buy a new OEM HPFP it comes with a new fuel pressure sensor on it correct? I need both I believe.