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2020 FORD F-150
3.5L V6 EcoBoost•RWD•AUTOMATIC•gas•turbo
11 active safety recalls on this vehicle — view recalls
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Repairs418Labor1009Torque7006Fluid18DTC3214Battery2Maintenance0Recalls11
P0571moderate severityPowertrain

Cruise Control/Brake Switch A Circuit Malfunction

on 2020 Ford F-150 3.5L V6 EcoBoost · RWD

What this code means

The PCM has detected a fault in the brake switch circuit used by the cruise control system. This can cause the cruise control to malfunction or fail to disengage on braking.

Symptoms

  • Cruise won't cancel when braking
  • Brake lights malfunction
  • Cruise control inoperative

Common causes

  • Faulty brake light switch
  • Misadjusted brake switch
  • Wiring or connector fault
  • PCM fault

Diagnostic steps

  1. Test brake switch operation
  2. Check switch adjustment
  3. Inspect wiring and connectors
  4. Replace brake switch as needed
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