What does code U061B mean?

Q: What does code U061B mean?

Lost Communication With Reductant Level Sensor C. U061B is a generic communication fault indicating that a control module on the vehicle's network has lost contact with the reductant level sensor C, which is part of the diesel exhaust fluid (DEF) system. The computer detected that expected messages from this sensor stopped arriving over the communication bus, so it cannot determine the DEF level from that sensor.

DTC codes / U06xx · Network communication / U061B

U061BLost Communication With Reductant Level Sensor C

U061B is a generic communication fault indicating that a control module on the vehicle's network has lost contact with the reductant level sensor C, which is part of the diesel exhaust fluid (DEF) system. The computer detected that expected messages from this sensor stopped arriving over the communication bus, so it cannot determine the DEF level from that sensor.

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.