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P0572moderate severityPowertrain

Cruise Control/Brake Switch A Circuit Low

on 2015 Kia Forte 1.8L I4 · FWD

What this code means

The PCM detects a low signal voltage in the brake switch circuit used by cruise control. This often indicates a short to ground or a failed switch.

Symptoms

  • Cruise won't disengage on braking
  • Brake light issues
  • Cruise control faults

Common causes

  • Short to ground in circuit
  • Faulty brake light switch
  • Corroded connector
  • PCM fault

Diagnostic steps

  1. Read stored codes
  2. Test brake switch signal voltage
  3. Inspect wiring for shorts to ground
  4. Replace switch or repair wiring

Other Powertrain codes on this vehicle

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