Vauxhall Vivaro fault

I have a 2007 Vauxhall Vivaro 2.0cdti engine is turning over will not start. Had a guy plug it into a computer Delpha system fault that was there was camshaft sensor i've replaced that still nothing. I've replaced the battery in the key fob now sometimes it works the locks sometimes it doesn't. Can anyone shed any light on this please.

 

Without spending cash unnecessarily there is likely to be a fault with the crank position sensor too......sometimes the two sensors get out of phase if a timing chain wears.
John

 

Thanks John i'll look into that today

 

I had the same problem a few years ago ,Both can go at the same time apparently

Phil