Blimey , just been scratching my head around the identical start up issue on a Nissan Almera N16 . No engine check light and no fault codes though . But it does have signal for the LPG ECU taken/soldered on the camshaft sensor so either the wiring or the sensor are "compromised" with regards to proper signal . Excellent mechanic Mr. Matt !! very skilled , keep posting videos what ever you're working on ! . (p.s. you certainly deserve an nice garage for working in doors)
Replaced my astra camshaft sensors with brand new Lucus ones a few months ago and they were giving intermittent none starts, Replaced them again with Genuine Vauxhall ones and cars been fine since, i found the Lucus ones have very weak megnets.
