What does code U0103 mean?

Q: What does code U0103 mean?

Lost Communication With Gear Shift Module. U0103 means the engine control module or another network module has lost the controller area network (CAN) communication link with the gear shift module, which is the electronic shifter assembly that reports lever position and range commands. The computer detected that no valid messages arrived from the gear shift module within the expected time window, so it flagged the module as offline.

DTC codes / U01xx · Lost communication with a control module / U0103

U0103Lost Communication With Gear Shift Module

U0103 means the engine control module or another network module has lost the controller area network (CAN) communication link with the gear shift module, which is the electronic shifter assembly that reports lever position and range commands. The computer detected that no valid messages arrived from the gear shift module within the expected time window, so it flagged the module as offline.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaLost communication with a control module

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