Oil pressure warning light illuminated

Had a neighbour call round yesterday who had dropped off his 2.3 petrol Transit for an MoT. Fair play to testing stn, they rang him to say it would fail on the screen having a crack in it.
When he got there they also stated it would fail due to the oil pressure light being permanently illuminated !!!
(apparently, it's been on for around a year and a local garage has told him the switch circuit goes through the PCM !!! It does not.)

Is that Correct??

Although I have not tested for few years now, I'm aware many warning lights will generate a fail nowadays, didn't think oil light was one of them.
My gut feeling is pass and advise. .
Coming in during the week for further checks, wire pulled from switch, light stays on.

Regards, Tony.