Need help troubleshooting P0089

**rustyleskiv** · 03-07-2010 05:51 PM

2007 A4 2.0T auto. 30000 miles. I got a CEL "P0089 Fuel Pressure Regulator 1 Perform" and "P0441 EVAP Control System Purge Flow Fault". Rpm's were fluctuating around 2000 mark. After I read up on these forums I replaced the cam follower (06D-109-309-C) and new seal. It had slight wear on the follower but cam was perfect and pump shaft seemed fine too. But the code comes right back. I have replaced the low pressure sensor (06F-145-710-G) as well as the N80 valve(06E-906-517-A). Originally I had the P0087 code but after replacing the fuel pressure sensor (06E-906-051-K) it replaced with the current P0089 code. Other than the fluctuating rpm's when I am accelerating slowly there are no other symptoms. Any ideas what could be the problem?

**maidest** · 03-07-2010 06:22 PM

PCV? Or coilpacks? I would check both.

**WayzataAudi** · 03-07-2010 07:25 PM

hmm sometimes i get that code but once i clear it, it doesnt come back. i just think its because of fuel cut when the boost spikes or something but who knows...

**plokm** · 03-07-2010 07:54 PM

I have the same problem. also need help with it

**Tusin** · 03-07-2010 08:22 PM

You might want to ask or search vwvortex. Remember our engines are the same, and there are many more VW's on the road.

**rustyleskiv** · 03-08-2010 01:52 PM

I already replaced the PCV. No change

**dualcyclone** · 03-09-2010 04:29 AM

Hi,

I have a copy of autodata which throws up a possible cause for your problems. I am no mechanic so other than what this says i would have no idea but i hope this helps you.

P0089:
Fault Location: Fuel pressure regulator 1 - performance problem
Probable Cause: Fuel pressure regulator, mechanical fault

P0441=
Fault Location: Evaporative emission (EVAP) system - incorrect flow detected
Probable Cause: Hose connection(s), intake leak, EVAP canister purge valve

**rustyleskiv** · 03-09-2010 08:17 AM

Is there a way to test the fuel pressure regulator to see if its bad?

**montess2001** · 03-09-2010 10:07 AM

does anyone know the part number for fuel pressure regulator?

**montess2001** · 03-16-2010 12:34 PM

any luck on the troubleshooting rustyleskiv?

**viziers** · 03-16-2010 12:41 PM

I have been getting the same P0089 code for the last 1 1/2yr and was told by a very knowledgable Audi tech that if after replacing the low pressure reg on the HPFP that its the regulator on top of the pump, and the only way to fix it is to replace the entire HPFP... I'll be testing this theory soon when I replacce my stock HPFP with the APR HPFP....

vizi

**plokm** · 03-16-2010 01:05 PM

I replaced the fuel filter, LP sensor and the HPFP and I still get the code.

**viziers** · 03-16-2010 01:26 PM

Originally Posted by plokm

I replaced the fuel filter, LP sensor and the HPFP and I still get the code.

Damn!!!!!!

vizi

**JRMSLINEA4** · 03-16-2010 01:42 PM

Originally Posted by rustyleskiv

2007 A4 2.0T auto. 30000 miles. I got a CEL "P0089 Fuel Pressure Regulator 1 Perform" and "P0441 EVAP Control System Purge Flow Fault". Rpm's were fluctuating around 2000 mark. After I read up on these forums I replaced the cam follower (06D-109-309-C) and new seal. It had slight wear on the follower but cam was perfect and pump shaft seemed fine too. But the code comes right back. I have replaced the low pressure sensor (06F-145-710-G) as well as the N80 valve(06E-906-517-A). Originally I had the P0087 code but after replacing the fuel pressure sensor (06E-906-051-K) it replaced with the current P0089 code. Other than the fluctuating rpm's when I am accelerating slowly there are no other symptoms. Any ideas what could be the problem?

Anyone know if there is a Fuel Pressuer Regulator adaptation that has to be done after replacing these parts? Thats my thinking.

**plokm** · 03-16-2010 02:40 PM

Originally Posted by JRMSLINEA4

Anyone know if there is a Fuel Pressuer Regulator adaptation that has to be done after replacing these parts? Thats my thinking.

http://www.goapr.com/images/support/...7-69%20TSB.pdf

Run basic setting 103 to adapt system

**rustyleskiv** · 03-16-2010 04:05 PM

No, no luck troubleshooting this yet? Glad I didnt buy a HPFP yet since it apparently wont fix this problem. Been clearing the codes for the past few days and see that The fuel code comes back teh same day but evap code takes a few days to appear.

**coolguy32** · 03-16-2010 06:26 PM

Originally Posted by plokm

I have the same problem. also need help with it

i'm having the same issue around 32-4000 rpm, it's intermittent, but i'm not throwing a CEL.....i'm also thinking it may be the regulator......any ideas on the price on one???

**JRMSLINEA4** · 03-16-2010 06:31 PM

Originally Posted by plokm

http://www.goapr.com/images/support/...7-69%20TSB.pdf

Run basic setting 103 to adapt system

Thanks.

**plokm** · 03-16-2010 07:11 PM

Originally Posted by coolguy32

i'm having the same issue around 32-4000 rpm, it's intermittent, but i'm not throwing a CEL.....i'm also thinking it may be the regulator......any ideas on the price on one???

http://www.genuinevwaudiparts.com

part number 06E-906-051-K