hi all this van came in today for a service and the customer said that the edc light comes on when under load. i plugged it in and it showed fault code as above. the fuel pressure on idle was 315 and required was 350 so it's a bit low but the van drives fine in normal conditions. i plan to replace the fuel filter when it comes back and check the in tank pump's pressure. does anybody knows what that should be? also it has the glow plug light on and fault codes how big a job is it to replace them? thanks