C0644
Brake Pressure Sensor K Range/Performance
C0644 is an OBD-II diagnostic trouble code meaning: Brake Pressure Sensor K Range/Performance. Common causes: brake pressure sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- The brake system fault indicator is on
- Reduced braking performance
- Unstable operation of ABS or ESP
- Unusual behavior of the brake pedal
Causes
- Brake pressure sensor malfunction
- Open or short circuit in wiring harness
- Poor contact in the sensor connector
- Problems with the brake system (leaks, air in the system)
- Brake ECU malfunction
How to Fix
- Check the brake pressure sensor for damage
- Check the wiring harness and connectors for breaks and corrosion.
- Check the pressure in the brake system
- Replace brake pressure sensor if necessary
- Clear error codes and check if C0644 returns
Related codes
Error C0644 by Vehicle Brand
FAQ
What does the C0644 code mean?
C0644 is an OBD-II diagnostic trouble code that indicates: Brake Pressure Sensor K Range/Performance
What causes a C0644 error code?
The most common causes of C0644 include: Brake pressure sensor malfunction; Open or short circuit in wiring harness; Poor contact in the sensor connector; Problems with the brake system (leaks, air in the system).
How do I fix a C0644 diagnostic trouble code?
To fix C0644: Check the brake pressure sensor for damage. Check the wiring harness and connectors for breaks and corrosion.. Check the pressure in the brake system. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0644?
Limited driving only, diagnose soon
How much does it cost to fix C0644?
The estimated repair cost for C0644 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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