C0643
Brake Pressure Sensor K Circuit Low
C0643 is an OBD-II diagnostic trouble code meaning: Brake Pressure Sensor K Circuit Low. Common causes: broken wiring harness to pressure sensor, short circuit to ground in the sensor circuit. Estimated repair cost: $89–222.
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
Error C0643 by Vehicle Brand
FAQ
What does the C0643 code mean?
C0643 is an OBD-II diagnostic trouble code that indicates: Brake Pressure Sensor K Circuit Low
What causes a C0643 error code?
The most common causes of C0643 include: Broken wiring harness to pressure sensor; Short circuit to ground in the sensor circuit; Malfunction of the pressure sensor itself; Problems with sensor connectors.
How do I fix a C0643 diagnostic trouble code?
To fix C0643: Check the integrity of the wiring harness and pressure sensor connectors. Measure resistance and voltage at the sensor. Check sensor circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0643?
Limited driving only, diagnose soon
How much does it cost to fix C0643?
The estimated repair cost for C0643 is $89–222. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat