What is OBD-II and can I modify my car with aftermarket parts?
OBD-II or On-Board-Diagnostics Second Generation is a revised PCM program that monitors that catalytic converter process by monitoring 2 additional sensors behind the cat converters. It is assumed that if the readings detect higher emissions, then the catalyst process is no longer functioning properly. For obvious reasons, any radical mod’s (CAM’s, etc) should be checked out with the manufacturer prior to installation to determine if this will cause any error codes.
