C0046

Brake Pressure Sensor A/B

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

ABS/ESP indicator is on
Unstable operation of the anti-lock braking system
Reduced braking performance
Activating the emergency brake system

Causes

Brake pressure sensor malfunction
Open or short circuit in wiring harness
Poor contact in the sensor connector
Low brake fluid level
Air in the brake system

How to Fix

Check the brake fluid level
Inspect the wiring harness and sensor connectors
Check sensor resistance and voltage
Replace brake pressure sensor if necessary
Diagnose the ABS/ESP system after repair

Related codes

C0045 C0047 C0050