C0203

Master Cylinder Pressure Sensor

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

ABS/ESP indicator is on
Reduced braking performance
Incorrect operation of the stabilization system

Causes

Pressure sensor malfunction
Open or shorted wiring harness
Poor contact in the sensor connector
Malfunction of the ABS/ESP control unit

How to Fix

Check the pressure sensor using an OBD-II scanner
Check the integrity of the wiring harness and contacts
Replace sensor if necessary
Check ABS/ESP control unit

Related codes

C0200 C0201 C0202