What does code U0285 mean?

Q: What does code U0285 mean?

Lost Communication With Active Grille Air Shutter Module B. U0285 is a generic communication fault indicating that the engine control module (ECM) or body control module (BCM) has lost the controller area network (CAN) signal from the active grille air shutter module B, which is the second shutter actuator on vehicles with a split or dual grille system. The computer sets this code when it expects regular status messages from that module but receives none for a calibrated period, typically after the ignition is turned on or while the vehicle is moving.

DTC codes / U02xx · Lost communication with a control module / U0285

U0285Lost Communication With Active Grille Air Shutter Module B

U0285 is a generic communication fault indicating that the engine control module (ECM) or body control module (BCM) has lost the controller area network (CAN) signal from the active grille air shutter module B, which is the second shutter actuator on vehicles with a split or dual grille system. The computer sets this code when it expects regular status messages from that module but receives none for a calibrated period, typically after the ignition is turned on or while the vehicle is moving.

SystemNetwork

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

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.