What is the U0131 error code?

The monitoring module expects to receive periodic 'heartbeat' data packets from the Power Steering Control Module (PSCM) via the CAN (Controller Area Network) bus. If these messages are not received within a manufacturer-dependent timeframe, the system determines that communication has been lost and stores the fault code. This logic typically triggers when there is an interruption in the module's power supply, a break in the communication wiring, or an internal processing failure within the module itself.

What does U0131 mean?

This code indicates that the vehicle's internal computer network has lost contact with the Power Steering Control Module (PSCM). When this happens, the vehicle typically loses its steering assist, making the steering wheel feel much heavier and more difficult to turn. It is often accompanied by warning lights for steering or stability control because these systems rely on communication with the power steering system to function correctly.

System Faults

Diagnostic Reasoning

An engineering-focused reference for the interpretation of automotive fault logic. We prioritize diagnostic methodology over component replacement.

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