[Jacko1]

When I get into my 2002 peugot 1.9 diesel sometimes flashes up on dash immobiliser fault and car won't start after turning ignition on and off a few times light goes out and car starts plugged into diagnostics coming up crank shaft any help pleasesensor

 

[IanML]

When it happens next, leave the ignition on and open the drivers door - does the warning sound result? If it does not, it proves that the car system is not recognising the key, possibly due to poor performance of the immobiliser antenna in the key switch unit.