Technician a Says That Before Performing Proprietary Reprogramming of an Engine

Multiple Choice

Technician A says that before performing proprietary reprogramming of an engine ECM, any fault codes should be cleared. Technician B says that in some cases following a proprietary data reprogramming procedure, a verification file has to be uploaded to the OEM data huB. ho is right?

A) Technician A only
B) Technician B only
C) Both A and B.
D) Neither A nor B