Land Rover U0151-31 Better (2026)

Your Land Rover’s computer has lost communication with the Restraints Control Module (RCM) – the brain that controls the airbags and seatbelt pretensioners. The “-31” means the signal it is receiving is incomplete or invalid.

The high-speed CAN bus wires (typically twisted pair: CAN High and CAN Low) connect to the RCM. A broken wire, chafing behind the dashboard, or a poor splice can cause the "-31" signal loss.

: Corroded or broken wires, particularly in the door sills or harnesses under the front seats. land rover u0151-31

Diagnose network wiring to RCM. Check for corrosion. Replace RCM and reprogram if needed.

Here is a draft text you could use for a repair order, a diagnostic summary, or a customer explanation. Your Land Rover’s computer has lost communication with

Through years of Land Rover diagnostics, technicians have identified several root causes. Do not assume the RCM itself is bad. In fact, the module is rarely the culprit.

Airbag system disabled. SRS light on. No airbag deployment in a crash. A broken wire, chafing behind the dashboard, or

= Lost Communication with Restraints Control Module (RCM) – Invalid/Incomplete Signal