Code result
P050F
Brake Assist Vacuum Too Low
Moderate severity
What it means
The ECU monitors the vacuum supplied to the brake booster (either via a dedicated sensor or via intake manifold pressure). The level has dropped below the calibrated threshold; brake-pedal feel will be hard, and an electric vacuum pump may be commanded to restore vacuum.
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
Vacuum leak in booster line or check valve
highOne of the most commonly reported causes for this code — check this first.
Electric vacuum pump weak
mediumA plausible cause — test and verify before replacing parts.
Related help
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