What does code U030B mean?

Q: What does code U030B mean?

Software Incompatibility With Glow Plug Control Module 2. U030B is a network communication fault indicating that the engine control module (ECM) has detected a software incompatibility with the glow plug control module 2, a secondary module used on some diesel engines to manage glow plug operation. The ECM compares software version and calibration data during initialization and sets this code when the two modules cannot agree on a compatible operating strategy.

DTC codes / U03xx · Software and configuration mismatches / U030B

U030BSoftware Incompatibility With Glow Plug Control Module 2

U030B is a network communication fault indicating that the engine control module (ECM) has detected a software incompatibility with the glow plug control module 2, a secondary module used on some diesel engines to manage glow plug operation. The ECM compares software version and calibration data during initialization and sets this code when the two modules cannot agree on a compatible operating strategy.

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.