2014 2.0 insignia cdti. No crank, No start when hot.

[steverax]

Can anyone help or point me in the right direction please, I have a 2014 63 plate 2.0 diesel insignia eco manual, when you have driven it for a while turn it off and try and restart it it wont start. All the lights come on as usual but it wont even crank over it's as if I'm trying to start it without putting my foot on the clutch pedal (which you have to do to start it) if I leave it for 20mins or so it then starts no issues at all. It's like it needs time to cool down but nothing seems hot the engine temp is fine can anyone help please if you do short journeys it's fine it's just when it's been driven from a while.

[Vauxhall Owners Club]

Crankshaft Position Sensor sounds like the most likely culprit

Works fine when cold after trying to restart on warm engine then no start. Let it cool then the resistance in the sensor changes back to normal and hey presto!

Test and replace the sensor may be the answer