DTC U0300: Internal Control Module Software Incompatibility: Description

WARNING: This page is about a different car, the 2013 Ford Fiesta. However, it is still accessible from the selected car via links, so may be relevant.

The PSCM is self monitoring and will carry out self-tests at specific intervals (initial power up, power down, during normal operation, etc.). Each self-test requires the voltage supply to the PSCM to be between 10 and 16 volts and the vehicle speed to be below 2 km/h (1.24 mph) for the test to take place. If one or more of the self-tests should fail, then the module will set one or more DTCs.

DTC U0300:00 (Internal Control Module Software Incompatibility: No Sub Type Information) - This DTC is set if the PSCM detects a configuration data failure or a mismatch between the stored and retrieved data during self-test.