OBD2 Code C0399: Braking - Control Module
Brake module malfunction.
Detected Root Component
Chassis Component
Observed Symptoms
- Braking noise
- Soft brake pedal
- Vehicle pulls when braking
- ABS light on
Possible Causes
- Faulty wheel speed sensor
- Faulty ABS module
- Contaminated brake fluid
- Failed master cylinder
Tools Required
Interactive Diagnostic
Answer each question to calculate your diagnostic score.
No steps available.
Diagnostic Result
Score threshold guide
Was this diagnostic helpful?
Parts likely to be the cause (Capteur ABS)
Capteur ABS
Photo d'illustration : Capteur ABS
© DTC-Logic.com
Click on an image to enlarge
Frequently asked questions about code C0399
What does code C0399 mean? ▾
OBD2 Code C0399: Braking - Control Module. Brake module malfunction.
What are the symptoms of code C0399? ▾
Code C0399 may cause: Braking noise, Soft brake pedal, Vehicle pulls when braking, ABS light on. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code C0399? ▾
The most common causes of code C0399 are: Faulty wheel speed sensor, Faulty ABS module, Contaminated brake fluid, Failed master cylinder. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code C0399? ▾
Yes, code C0399 is critical (Critical). Avoid driving and consult a professional promptly to prevent major damage.
How do I fix code C0399? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Faulty wheel speed sensor, Faulty ABS module, Contaminated brake fluid, Failed master cylinder. Difficulty: Medium · Estimated time: 30-60min.