What does code U0110 mean?

Q: What does code U0110 mean?

Lost Communication With TCM. U0110 is a generic communication fault indicating that the engine control module (ECM) or another primary controller has lost contact with the transmission control module (TCM) over the vehicle's controller area network (CAN) bus. The code is set when the module that monitors the bus stops receiving the TCM's periodic status messages, not when the transmission itself reports an internal failure.

DTC codes / U01xx · Lost communication with a control module / U0110

U0110Lost Communication With TCM

U0110 is a generic communication fault indicating that the engine control module (ECM) or another primary controller has lost contact with the transmission control module (TCM) over the vehicle's controller area network (CAN) bus. The code is set when the module that monitors the bus stops receiving the TCM's periodic status messages, not when the transmission itself reports an internal failure.

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.