What does code U0305 mean?

Q: What does code U0305 mean?

Software Incompatibility with Cruise Control Module. U0305 is a generic network communication code indicating that the engine control module or another primary controller has detected a software incompatibility with the cruise control module. The computer is not reporting a wiring fault or a failed cruise switch; it is flagging that the software configuration, calibration, or part number programmed into the cruise control module does not match what the rest of the vehicle network expects.

DTC codes / U03xx · Software and configuration mismatches / U0305

U0305Software Incompatibility with Cruise Control Module

U0305 is a generic network communication code indicating that the engine control module or another primary controller has detected a software incompatibility with the cruise control module. The computer is not reporting a wiring fault or a failed cruise switch; it is flagging that the software configuration, calibration, or part number programmed into the cruise control module does not match what the rest of the vehicle network expects.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaSoftware and configuration mismatches

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.