Hi, Not overly familiar with this one, but has it got a cam sensor, 'cause if it hasn't it won't be able to detect a problem with crank/cam phase i.e. slack belt/chain etc.. In that case could be flagging up distorted crank signal.
Worth a mention that I had a slightly earlier one of these (98?) that suddenly wouldn't start, until I changed the plug leads, then OK for last 18 months?! Regards, Nick Bell