OBD-II Diagnostics Fundamentals

Drive an OBD-II scan tool the way a working technician does: J1962 connector location, the CAN protocol used on essentially every US vehicle since 2008, reading and interpreting P0/P1 DTCs, pulling freeze-frame vs live data, and using short-term and long-term fuel trims to turn a code into a diagnosis. Wraps the OBD-II scan tool guide with a full code walk-through and day-one safety so the shop bay stays safe while the problem gets solved.