C0646

Brake Pressure Sensor L Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

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

Causes

Brake pressure sensor malfunction
Open or short circuit in wiring harness
Problems with the ABS/ESP control unit
Corrosion of contacts or connectors

How to Fix

Check the integrity of the sensor wiring harness
Measure resistance and voltage at the sensor
Check connectors and contacts for corrosion
Replace brake pressure sensor if necessary
Reset the error and check the system

Related codes

C0645 C0647 C0050