What does code U069B mean?

DTC codes / U06xx · Network communication / U069B

U069BLost Communication With Exhaust Gas Temperature Sensor Bank 1 Sensor 4

U069B is a generic network communication code indicating that a control module on the vehicle's data bus has lost contact with the exhaust gas temperature sensor for bank 1 sensor 4. The module monitoring that sensor, typically the engine control module or a dedicated aftertreatment controller, has stopped receiving valid temperature data over the communication network for a calibrated period.

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.