C0543

Brake Pressure Sensor B Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

The brake system fault indicator is on
Reduced ABS/ESP performance
Unstable behavior of the emergency braking assistance system

Causes

Brake pressure sensor fault (circuit B)
Open or short circuit in wiring harness
Corroded contacts or poor connection
ABS/ESP control module malfunction

How to Fix

Check the integrity of the wiring harness and connections
Measure the resistance and voltage at the pressure sensor
Check the sensor readings using a diagnostic scanner
If necessary, replace the sensor or repair the wiring harness

Related codes

C0544 C0542 C0051