Code result
C0571
Active Brake Assist Performance
Moderate severity
What it means
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.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Active booster slow or weak
highOne of the most commonly reported causes for this code — check this first.
Secondary fault on related sensor
mediumA plausible cause — test and verify before replacing parts.
System calibration required after repair
lowLess common, but worth ruling out after the more likely causes.
Related help
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