What does code U0300 mean?

Internal Control Module Software Incompatibility: A control module has incompatible software — may need reflashing.

U0300 is rated as medium severity. Schedule service — affects performance or emissions.

U0300

Internal Control Module Software Incompatibility

Network Code · Medium

What does U0300 mean?

A control module has incompatible software — may need reflashing.

System: Module Communication

U0300 is a network diagnostic trouble code indicating internal control module software incompatibility. This code is classified as medium severity, which means: schedule service — affects performance or emissions.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your vehicle.