What does code U0151 mean?

Q: What does code U0151 mean?

Lost Communication With Restraints Control Module. U0151 means the vehicle's main communication network has lost contact with the Restraints Control Module (RCM), the computer that monitors airbags, seatbelt pretensioners and crash sensors. The module that set the code, often the body control module or gateway, tried to reach the RCM over the Controller Area Network (CAN) bus and received no valid response for a set number of attempts.

DTC codes / U01xx · Lost communication with a control module / U0151

U0151Lost Communication With Restraints Control Module

U0151 means the vehicle's main communication network has lost contact with the Restraints Control Module (RCM), the computer that monitors airbags, seatbelt pretensioners and crash sensors. The module that set the code, often the body control module or gateway, tried to reach the RCM over the Controller Area Network (CAN) bus and received no valid response for a set number of attempts.

SystemNetwork

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

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.

Reading U0151

UNetwork: communication between the vehicle's control modules.

0Generic (SAE) code: it means the same thing on every OBD-II vehicle.

1Lost communication with a control module.

51The exact fault within that area.

Often seen with

See it working

How Airbags Work: A 50 km/h Crash in Slow Motion

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