Active Brake Assist Performance
The brake assist or driver assistance module has detected that brake assist performance is degraded. The system may fail to autonomously build pressure during emergency braking and emergency brake assist functions are limited.
Affected components
- Active brake booster
- Brake assist module
- Brake pressure sensor
Common causes
- High likelihood: Active booster slow or weak
- Medium likelihood: Secondary fault on related sensor
- Low likelihood: System calibration required after repair
Possible symptoms
- ABS warning light on
- ESC/stability control deactivated
- Possible reduced brake assist
- Speedometer may behave erratically
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.