P050F OBD II Trouble Code Brake Assist Vacuum Too Low

How to easily diagnose, repair, and info on causes of a P050F trouble code that indicates a detected low condition regarding the brake assist vacuum.

Symptoms of P050F OBD II Trouble Code

  • Audible hissing when depressing the brake pedal
  • Increased effort required to depress brake pedal
  • Other codes could be stored, including manifold absolute pressure (MAP) codes
  • Engine drivability issues created by a vacuum leak

Common Causes of P050F OBD II Trouble Code

  • Internal leak in the vacuum brake booster
  • Bad vacuum brake sensor
  • Cracked or disconnected vacuum hose
  • Faulty one-way check valve in the vacuum supply hose
  • Insufficient engine vacuum

Severity of P050F OBD II Trouble Code

Low vacuum pressure at the brake booster can result in increased effort required to activate braking. This could lead to a vehicle collision. A P050F should be addressed with urgency.