2.0 PD TDI BMM Oil pressure warning

[csapos]

Hello everyone!
Im totally new in this forum.
I have an Audi A3 with 2.0 PD TDI engine (motorcode: BMM) which doesnt have a hexagon.
Im experiencing some issues for about 2 weeks. The “Öldruck” text comes up randomly for about 1-2sec but sometimes for 1-2 minutes. The warning comes up when i need a little bit “more” power, for example when i accelerating out from a roundabout.
Changed the oil (good quality, vw 50x approved), filter, pressure sensor, then for about 500km it was fine. No warning at all, but today it started again.
I dont hear any noises, fine start when cold/hot. No strange noises.
Somebody experienced these things before? Could be an oil pump failure?
Thanks in advance,
David
(Btw. sorry for my english, im just learning it)


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[Crasher]

Could be debris in the sump.