EPC light / HP Fuel pressure question

[Prefferle]

Hi Folks,

i hope that all in here are doing great !

My my car is a 2006 Audi-S8, d3 4e 5.2L

Im hoping that you can offer some insight on an issue - Driving home yesterday on the motorway I chose to overtake quickly and my EPC light came on. Only the EPC lamp.
I backed off and drove the rest of the way home at a more leisurely rate. Switched off for about 30min, then started driving again the EPC lamp was off, then switched back on again when I tried accelerating strongly.
Connecting VCDS at home i am seeing a Fuel Rail System Pressure too low Code.
Notes: I have not driven on a motorway in several months but use the car weekly for 5-20-mile trips.
I serviced a few and replaced the others fuel injectors about 2x years ago along with a walnut blast carbon clean. About 5k miles since then.
the car generally starts well and runs well with no noticeable misfiring.
The car never had the EPC lamp on previously to today.

at Idle 640/min:
LP fuel pressure real time data at 5.08-6.2 Bar fluctuating.
HP fuel pressure at idle 29.5 bar to 32 bar fluctuating.

can anyone tell me if these values are ok? Should I suspect one or both HP pumps?

please review the below VCDS log and offer your thoughts?
do You think that the HP pump/s are definitely an issue?

Monday,05,September,2022,12:12:39:60735
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 22.9.0.0 (x64) HEX-V2 CB: 0.4623.4
Data version: 20220830 DS341.0
www.Ross-Tech.com


VIN: WAUZZZ4E67N003566 License Plate: AD06 YMC
Mileage: 241680km-150172mi Repair Order:



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Chassis Type: 4E (4L0)
Scan: 01 02 03 05 06 07 08 09 11 31 15 16 17 19 1D 1E 28 34 36 37
38 42 46 47 4F 52 53 55 56 57 61 62 65 67 6C 72 76 77

VIN: WAUZZZ4E67N003566 Mileage: 241680km-150172miles

00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: Malfunction 0010
02-Auto Trans -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
05-Acc/Start Auth. -- Status: OK 0000
06-Seat Mem. Pass -- Status: Malfunction 0010
07-Control Head -- Status: OK 0000
08-Auto HVAC -- Status: Malfunction 0010
09-Cent. Elect. -- Status: OK 0000
11-Engine II -- Status: OK 0000
31-Engine other -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
1D-Driver Ident. -- Status: OK 0000
1E-Media Player 2 -- Status: OK 0000
28-HVAC, Rear -- Status: Malfunction 0010
34-Level Control -- Status: OK 0000
36-Seat Mem. Drvr -- Status: OK 0000
37-Navigation -- Status: OK 0000
38-Roof Electronics -- Status: Malfunction 0010
42-Door Elect, Driver -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
47-Sound System -- Status: OK 0000
4F-Centr. Electr. II -- Status: OK 0000
52-Door Elect, Pass. -- Status: Malfunction 0010
53-Parking Brake -- Status: OK 0000
55-Headlight Range -- Status: OK 0000
56-Radio -- Status: OK 0000
57-TV Tuner -- Status: OK 0000
61-Battery Regul. -- Status: OK 0000
62-Door, Rear Left -- Status: Malfunction 0010
65-Tire Pressure -- Status: OK 0000
67-Voice Control -- Status: OK 0000
6C-Back-up Cam. -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000
76-Park Assist -- Status: OK 0000
77-Telephone -- Status: OK 0000
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Address 01: Engine Labels:. 07L-910-552-BSM1.clb
Part No SW: 4E0 910 552 HW: 4E0 907 552
Component: 5.2L V10/4V FSI ª0060
Revision: 5AH11--- Serial number: AUX3Z0F5397064
Coding: 01060003190F0160
Shop #: WSC 54321 123 12345
VCID: 5F98AA22BB334F03BE9-800A
VINID: 9D196AAAA115187780003146184279E91A

1 Fault Found:
000135 - Fuel Rail/System Pressure
P0087 - 002 - Too Low
Freeze Frame:
Fault Status: 01100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 241688 km
Time Indication: 0
Date: 2022.09.05
Time: 12:07:07

Freeze Frame:
RPM: 2416 /min
Load: 36.1 %
Speed: 49.0 km/h
Temperature: 57.0°C
Temperature: 28.0°C
Absolute Pres.: 1000.0 mbar
Voltage: 12.954 V

Readiness: 0010 1001

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Address 02: Auto Trans Labels: 09E-927-156.lbl
Part No SW: 4E1 910 156 K HW: 09E 927 156 B
Component: AG6 09E 5,2 FSI RdW 0020
Revision: --H01--- Serial number: 0087677
Coding: 0000001
Shop #: WSC 02313 785 00200
VCID: 2B000EF2BF0BE3A3621-807E

No fault code found.

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Address 03: ABS Brakes Labels: 4E0-910-517.lbl
Part No SW: 4E0 910 517 D HW: 4E0 614 517 AB
Component: ESP 5.7 allrad H46 0500
Coding: 0001627
Shop #: WSC 02313 000 00000
VCID: 2412E5CED2D52CDBA3B-8070

No fault code found.

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Address 05: Acc/Start Auth. Labels: 4E0-910-131.lbl
Part No SW: 4E0 910 131 HW: 4E0 909 131 K
Component: FBS AUDID3 H10 0190
Revision: 01904910 Serial number: AUX3Z0F5397064
Coding: 0412672
Shop #: WSC 02311 785 00200
VCID: 58EA813EDE1DB83BFF3-800C

Subsystem 1 - Part No: XXXXXXXXXXX
Component: ELV XXXX

No fault code found.

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