Hi sorry for being late to reply. In both my cases I concluded that there were problems with the wiring. In the first car, there was a problem with the solder of the sensor ground, in the second car the throttle plug was not seating fully into the socket. In both cases there was electrical continuity most of the time but from what I understand the e throttle system is VERY sensitive. The solder problem and the problem with the plug were randomly creating just enough resistance to trigger the fault. Fixed the problems, re calibrated and no more faults ever since. Hope it helps !