Re: Unsolvable Motor Control System Failure
Sounds similar to my issues that went on for months. I never had any indication other than the dash that something was wrong, it always ran fine and always came on about 4 miles in the journey.
Issue - lambda cable was resting on manifold as it has been pulled out of loom clip ( when the jokers did the cambelt change ). As the car heated up the resistance changed enough in the cable to give rouge relative signals. I just tied the cable onto the loom away from exhaust, 5 starts later to clear the fault and all has been fine for months and months.
Worth a check
These systems are soooo sensitive and based on grafting data.
There's nothing in the dark that isn't there in the light ..... except fear