2001 Prius update. After trying to get the OBD to reset by means of Drive Cycles,I took it to a mechanic who found that one of the computers had burned out circuits. Replaced that computer and now he said to drive the car for long periods of time At least 1 Hour or more for 3 consecutive days. Has anyone also had to do this to reset the OBD computer? The only 2 monitors left to reset are: a)Evaporative System & b) The Catalyst System. Please reply if you have any suggestions.