Citroen Relay 2.2 Hdi Weird Hot Start Issue

[Lodgey47]

not sure what's going on with my 60 plate relay camper but sometimes when the engine is hot and I turn it off for a few minutes when I get back in and try to start it just turns over with no sign of life but switching the key off and back on again straight away and it then starts normally, any ideas?? Edited April 23, 2018 by Lodgey47

[paul.h]

You probably need a diagnostic check to see if the various sensors are working properly. When it happens you could also check if the key is being recognised by leaving it in the ignition and opening a door - if recognised then you should get an alarm, if not then it might be an immobilser issue and the key might need to be initialised as if its battery was replaced. Does it start ok when left overnight as a check if the fuel filter is draining back.