Any Volvo geeks on duty Friday evening?
I have exactly same symptoms like this guy on YouTube, oil presure low around 30, buzzer on and off,
Code Mid128 pid100 fmi 1, shows oil pump possible cause:
Oil leak, broken oilpump, clogged oil system.
but I got another code Mid144 psid 200 fmi9, communication interferance , datalink engine control module, abnormal update rate, ecm msg not recived.
Could be oil pump or bad oil pressure sensor/harness ? O remember last time my oil pressure was bad, oil pressure was zero.