DTC U0300: PGM-FI System and A/T System Program Version Mismatch: General Description

A serial communication data version check of the communication data set is performed during the serial communication that takes place between the FI CPU and the A/T CPU.

When the rewriting of the FI CPU or the A/T CPU is done at the powertrain control module (PCM), and when different data of the serial communication data version is rewritten, a malfunction is detected and a DTC is stored.