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2016 FORD F-150
5.0L V8 Coyote•RWD•AUTOMATIC•gas
14 active safety recalls on this vehicle — view recalls
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Repairs420Labor1001Torque8720Fluid18DTC3192Battery2Maintenance0Recalls14
P0556high severityPowertrain

Brake Booster Pressure Sensor Circuit Range/Performance

on 2016 Ford F-150 5.0L V8 Coyote · RWD

What this code means

The brake booster pressure sensor is reading values outside the normal expected range. This can affect brake assist calculations and power braking response.

Symptoms

  • Brake warning light on
  • Harder brake pedal feel
  • Inconsistent brake assist

Common causes

  • Faulty brake booster pressure sensor
  • Vacuum leak at booster
  • Wiring or connector fault
  • Failed brake vacuum pump

Diagnostic steps

  1. Scan for related brake codes
  2. Inspect sensor and vacuum lines
  3. Compare sensor data to actual vacuum
  4. Test wiring continuity and replace sensor if needed
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