Boxer oil pressure switch - no 1131J2

[Dormouse]

Does anyone have experience of faulty oil pressure switches on a 2008 Boxer 2.2 . The parts lists give different switches for this model but I think it is 1131J2. Is this right and could you tell me exactly where it is fitted. cheers.

[Dormouse]

The reason I am asking is that my local garage is trying to say that the oil light flashes when a service is due but I don't have flashing. It works and extinguishes at cold start up but then comes on and stays on as the engine heats. The engine is running perfectly well with no signs of distress and when the engine is left for a while and restarted, the oil light goes out and then comes on again as the engine heats up.