What does code U02A3 mean?

Q: What does code U02A3 mean?

Lost Communication With Particulate Matter Sensor. U02A3 is a generic communication fault indicating that the engine control module (ECM) has lost the data signal from the particulate matter (PM) sensor, which is used on diesel vehicles to monitor soot levels in the exhaust. The ECM sets this code when it stops receiving the periodic serial data message that the PM sensor normally broadcasts over the controller area network (CAN) bus.

DTC codes / U02xx · Lost communication with a control module / U02A3

U02A3Lost Communication With Particulate Matter Sensor

U02A3 is a generic communication fault indicating that the engine control module (ECM) has lost the data signal from the particulate matter (PM) sensor, which is used on diesel vehicles to monitor soot levels in the exhaust. The ECM sets this code when it stops receiving the periodic serial data message that the PM sensor normally broadcasts over the controller area network (CAN) bus.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

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.