Russell Hobbs RHDW1B low water pressure

I have the above dishwasher at home and today the start/pause button lit and the wash cycle stopped, I checked the manual and it says that this is a fault code for low water pressure. I have removed the inlet pipe and checked it’s not blocked as well as removing all the panels and checking for signs of blockages inside the dishwasher, but can see nothing, I checked all electrical connections then put it back together. After this it completed one wash cycle ok then the fault came back.

I’m thinking that it must be either a faulty pressure switch or the pump but thought that someone with a bit more knowledge than me may be able to offer an alternative or maybe suggest how to diagnose.

Thanks in advance.