What does code U0146 mean?

Q: What does code U0146 mean?

Lost Communication With Gateway 'A'. U0146 indicates that one or more control modules have lost communication with the central gateway module, often called the Gateway 'A'. The gateway acts as the network hub that routes messages between different vehicle networks, so when it stops responding, multiple modules may set communication codes and various electrical features can behave erratically.

DTC codes / U01xx · Lost communication with a control module / U0146

U0146Lost Communication With Gateway 'A'

U0146 indicates that one or more control modules have lost communication with the central gateway module, often called the Gateway 'A'. The gateway acts as the network hub that routes messages between different vehicle networks, so when it stops responding, multiple modules may set communication codes and various electrical features can behave erratically.

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.