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Hello I hope I can offer you some assistance.
Have you the chassis number of the car? So I can obtain the correct details.
Sorry for the delay I've been trying to find out about the camshaft sensor operation on this engine. I can't find it in any documentation but I seem to remember from Ford that the camshaft sensor on this engine can be disconnected while the engine is running and the engine will continue to run, it's only when you turn the engine off and try to restart that the sensor is used for synchronizing the injectors, once running again the engine management uses the crank sensor. You can confirm this by disconnecting the sensor while the engine is running and see if it cuts out. The position of the sensor is just below the Exhaust Gas Recirculation pipe as shown below, the sensor is number 3.
It is tucked underneath the pipe so is quite difficult to see. Normally if this sensor fails you would get a fault code of P0340 or P0341.
If there are no fault codes then you need to be able to diagnose the concern when it actualy happens. When the fault occurs check the relays in the fuse box under the bonnet, try tapping them to see if this makes a difference, I've seen quite a few faulty relays causing this concern. Also check the main connectors in the front foot wells of the car, make sure they are fully engaged.
As the EOBD reader you used wasn't Ford IDS I would suggest having the engine management checked for fault codes by IDS as I'm aware of some generic code readers not picking up all codes on these stageV emission vehicles.
Let me know if I can assist further and I'll reply as soon as I can.
Hello again, a faulty crank sensor would certainly cause the engine to cut out. I have replaced a few but normally this fault leaves a fault code of P0335 or similar, having said this I have replaced a couple that left no codes at all even when using Ford IDS.
A low battery shouldn't make the engine cut out unless there is a fault with the charging system, if this was the case then the engine wouldn't restart without a jump start.
Let me know if I can assist any further.