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2019 FORD F-150
3.5L V6 EcoBoost•RWD•AUTOMATIC•gas•turbo
9 active safety recalls on this vehicle — view recalls
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Repairs418Labor1009Torque7006Fluid18DTC3214Battery2Maintenance0Recalls9
P0588moderate severityPowertrain

Cruise Control/Brake Switch B Circuit High

on 2019 Ford F-150 3.5L V6 EcoBoost · RWD

What this code means

The PCM detected high voltage on the cruise control brake switch B circuit. The brake switch signal is out of expected range and may disable cruise control.

Symptoms

  • Cruise control disabled
  • Brake lamp issues
  • Warning light on

Common causes

  • Faulty brake switch
  • Misadjusted pedal switch
  • Short to voltage in circuit
  • Damaged wiring or connector

Diagnostic steps

  1. Retrieve codes and freeze-frame
  2. Check brake switch adjustment and operation
  3. Measure switch B circuit voltage
  4. Replace or adjust switch as required
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