C0543
Brake Pressure Sensor B Circuit High
C0543 is an OBD-II diagnostic trouble code meaning: Brake Pressure Sensor B Circuit High. Common causes: brake pressure sensor fault (circuit b), open or short circuit in wiring harness. Estimated repair cost: $56–167.
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
Error C0543 by Vehicle Brand
FAQ
What does the C0543 code mean?
C0543 is an OBD-II diagnostic trouble code that indicates: Brake Pressure Sensor B Circuit High
What causes a C0543 error code?
The most common causes of C0543 include: Brake pressure sensor fault (circuit B); Open or short circuit in wiring harness; Corroded contacts or poor connection; ABS/ESP control module malfunction.
How do I fix a C0543 diagnostic trouble code?
To fix C0543: 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. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0543?
Limited driving only, diagnose soon
How much does it cost to fix C0543?
The estimated repair cost for C0543 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat