That is an interesting one for sure.
Has the dealer inspected all the wiring? Sometimes there can be weird interactions when stuff is cold vs hot. It could also be some strange interaction with the sensor and the air gap, but my experiences with crank position sensor intermittent issues generally goes back to the wiring at some level (I know this is related to cam position sensor but as far as I have always understood they operate on similar principles). Inspecting the pins in the connectors would be a good place to start with.
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- James
I like diesels
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