What does code U0632 mean?

Q: What does code U0632 mean?

Lost Communication With Fan 1. U0632 is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the cooling fan control module, often called Fan 1. The module that sets this code expected regular status messages from the fan controller and stopped receiving them for a calibrated period, so it flagged the missing communication rather than a direct fan electrical failure.

DTC codes / U06xx · Network communication / U0632

U0632Lost Communication With Fan 1

U0632 is a generic network communication code indicating that a control module on the vehicle's Controller Area Network (CAN) bus has lost contact with the cooling fan control module, often called Fan 1. The module that sets this code expected regular status messages from the fan controller and stopped receiving them for a calibrated period, so it flagged the missing communication rather than a direct fan electrical failure.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaNetwork communication

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