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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.

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