C0643

Brake Pressure Sensor K Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$89–222 (est.)

Symptoms

The ABS/ESP lamp on the dashboard is on
Deterioration in braking performance
Disabling the ESP system
Incorrect operation of the ABS system

Causes

Broken wiring harness to pressure sensor
Short circuit to ground in the sensor circuit
Malfunction of the pressure sensor itself
Problems with sensor connectors
Malfunction of the brake control module

How to Fix

Check the integrity of the wiring harness and pressure sensor connectors
Measure resistance and voltage at the sensor
Check sensor circuit for short circuit
Replace faulty brake pressure sensor if necessary
Check the operation of the ABS/ESP system after repair

Related codes

C0642 C0040 C0050