New fuelpomp problem P0089-00 (fuel Pressure Regulator)

Hello,

I am experiencing an issue with my Volvo S80 2.5T (2007) and would like to request your expertise.

Situation:
Previously, the car hesitated during acceleration, without any fault codes
Fuel pump replaced (part number 31372879) → hesitation issue resolved
Since then, the engine light remains on with fault code P0089-00 (Fuel Pressure Regulator Performance)

Parts already replaced before:
Fuel pressure sensor (Bosch 0 261 230 238)
Fuel pressure control valve
Ignition coils and spark plugs
Injectors
MAF sensor
Turbo control valve
Crankshaft sensor

Current condition:
Car now drives well, no loss of power
Fault code P0089 keeps returning after clearing
Fuel pump control module has been ordered elsewhere and will be installed soon

Additionally, I would like to ask if I need to:
Relearn or update the ECU
Or make any necessary adjustments so the new components are properly recognized

Since the car drives normally, it seems the issue may be related to regulation/feedback rather than a mechanical fault.

Thank you in advance for your assistance.

Als je het probleem wilt oplossen zul je een wijziging moeten aanbrengen die tijdens het rijden op LPG een brandstofdruk simuleert die acceptabel is.
Succes !