Hello I have a 2.0 vrs on an 07 plate think it's the pd engine. Cut out and won't start.i have read codes and I am getting p1517 main relay malfunction active. At first I got and high circuit load on injector bank a I think. Pressed wrong but and cleared codes.which is when I got the relay fault. So my first question is where is the relay. And next could this be a faulty injector?  Any help greatly appreciated. 

I don't know this vehicle type personally. However, as nobody has answered yet I will give you what I found from manuals.

 

That's probably relay 1 in the engine compartment relay box and yes the injector could be faulty.

Relay and injectors should be tested before making any replacements.