P050F

Brake Assist Vacuum Too Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

The brake pedal is slow
Increased braking force
Reduced braking performance
Hissing sound when pressing the brake (vacuum leak)

Causes

Leak in brake booster vacuum hose
Vacuum pump malfunction (on diesel engines)
Brake booster depressurization
Vacuum valve is dirty or damaged
Problems with the vacuum pump (if installed)

How to Fix

Check the vacuum hose for leaks (visually and audibly)
Check the brake booster for leaks
Inspect the vacuum pump (if equipped) for damage
Check the vacuum valve for dirt or wear
Replace damaged components

Related codes

P0500 P0501 P0502