I had the engine warning light appear on the dash last week - so I took it to the dealer and waited around while they ran a diagnostic - about 20 minutes later the tech manager says my cars fine, the fault stated the engine had been over revved! Initially I thought I had been rumbled for some aggressive driving, but it stated I had achieved 22k rpm.

Anyway all was fine until I started my car the other evening - engine light came back on, cars running fine, fuel consumption is normal. Has anyone experienced this type of electrical fault? Or have any suggestions on what component(s) may be failing?