C05D2

Master Cylinder Piston Position Higher Than Expected

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$111–333 (est.)

Symptoms

ABS/ESP malfunction indicator is on
Deterioration of the stabilization system
Unusual behavior of the brake pedal
Reduced braking performance

Causes

Worn master cylinder
Piston position sensor malfunction
Problems in the sensor wiring harness
Contamination or damage to the cylinder mechanism
Low brake fluid level

How to Fix

Diagnostics of the brake system with a scanner
Checking the level and condition of the brake fluid
Piston position sensor test
Inspect the master cylinder for leaks
Replacement of faulty components (cylinder, sensor)
Bleeding the brake system after repair

Related codes

C05D0 C05D1 C05D3