Error code
OBD2 P0571
OBD2P0571
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Brake Switch 'A' Circuit.
Severity
moderateCan drive but cruise control may not work.
Summary
P0571 indicates a malfunction in the cruise control/brake switch 'A' circuit, which can affect the operation of the cruise control system.
Symptoms
- Stored trouble code and an illuminated warning light
- Cruise control system deactivated by the PCM when this code is present
- Blown fuses related to the cruise control system
Common Causes
- Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors
- Defective brake/cruise control switch
- Blown fuses
- Failed or failing PCM (rare)
Diagnosis
- Check for blown fuses and repair wiring issues
- Inspect the brake/cruise control switch for damage or malfunction
- Perform resistance, ground connectivity, and continuity tests on associated wiring
Fixes
- Replace damaged wiring or connectors
- Replace defective brake/cruise control switch
FAQ
Can I drive with P0571?
Yes, but the cruise control system may not work.
What should I do if my fuses are blown?
Check and repair wiring issues before replacing any blown fuses.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0500Vehicle Speed Sensor 'A'
- P0501Vehicle Speed Sensor 'A' Range/Performance
- P0502Vehicle Speed Sensor 'A' Circuit Low Input
- P0503Vehicle Speed Sensor 'A' Intermittent/Erratic/High
- P0504Brake Switch 'A'/'B' Correlation
- P0505Idle Air Control System
- P0506Idle Air Control System RPM Lower Than Expected
- P0507Idle Air Control System RPM Higher Than Expected
- P0508Idle Air Control System Circuit Low
- P0509Idle Air Control System Circuit High
- P0510Closed Throttle Position Switch
- P0511Idle Air Control Circuit