C05CC

Brake Master Cylinder Piston Position Sensor A Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

ABS/ESP warning light is on
Deterioration of brake performance
Loss of effectiveness of active safety systems

Causes

Piston position sensor malfunction
Wiring harness damage
Poor contact in connectors
Problems with the master cylinder

How to Fix

Check the condition of the sensor and its connectors
Check the integrity of the wiring harness
Measure the resistance and voltage of the sensor
If necessary, replace the sensor or master cylinder

Related codes

C05CD C05CE C05CF