C05D1

Brake Master Cylinder Piston Position Sensor Supply Circuit

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine or ABS light is on
Incorrect operation of the brake system
Loss of braking efficiency

Causes

Open or short circuit in wiring harness
Piston position sensor malfunction
Problems with connectors or poor contact
Malfunction of the brake system control unit

How to Fix

Check the integrity of the wiring harness and connectors
Check the voltage on the sensor power circuit
Replace piston position sensor if necessary
Reflash or replace the brake system control unit if the problem persists

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