P0571
System
Powertrain (Cruise Control)
Scanner som krävs
Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Cruise Control/Brake Switch A Circuit Malfunction

Understand P0571, common causes, and the right FOXWELL scanner to diagnose it.

Brake switch circuit fault — cruise control may not cancel or set properly.

Vanliga symptom

  • Cruise won't set or cancel
  • Brake lights inop on some models

Typiska orsaker

  • Failed brake light switch
  • Adjustable brake pedal switch misadjusted
  • Wiring at brake pedal

Vilken scanner behöver du?

Enhanced OBD2 scanner (live data graphs, freeze frame, battery voltage test)

Använd live-data och freeze frame innan du byter delar. ABS-, SRS- och U-koder kräver oftast en fullsystems-scanner.

Diagnostiktips

  • Spara freeze frame när koden först sätts
  • Rensa koden först efter att orsaken är åtgärdad
  • Kontrollera relaterade väntande koder
  • Verifiera batterispänning över 12,4 V innan du misstänker sensorer

Rekommenderade FOXWELL-scannrar

Vanliga frågor

Can I diagnose P0571 with a basic code reader?
P0571 may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P0571?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.