P0571: Brake switch A circuit
What the code tells you on its own
- System
- Powertrain
- Functional group
- Idle and speed control
- Subsystem
- Speed, idle and auxiliary inputs
Engine, fuel, air, ignition, emissions and transmission. The overwhelming majority of what workshops bring to the AI.
Diagnostics
What we see when P0571 turns up
Measured across the diagnostics run through Wrenchlane, not taken from a reference table. Figures as of 2026-10-06.
- Diagnostics
- 3
- Separate workshops
- 3
- Arrived code only
- 0%
- Most common marque
- Citroen
February 2026 to June 2026
Not one shop meeting it repeatedly
No symptom description entered at all
Where we have seen it most
These are counts from our own work, not a claim about how common the fault is across all vehicles. They describe what independent workshops brought to us, which is a narrower and more specific thing.
Idle and speed control
Other idle and speed control codes
- P0507 Idle air control system RPM higher than expected
- P0504 Brake switch A/B correlation
- P0505 Idle air control system
- P052E Not individually documented
- P0501 Vehicle speed sensor A range/performance
- P0513 Incorrect immobiliser key
- P0553 Power steering pressure sensor A circuit high
- P050C Not individually documented
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Are the public fault code pages built from my diagnostics?
They use diagnostics run in WrenchLane, with no workshop, customer, registration number or VIN shown. Each fault code page shows how often the code was seen and in how many workshops.
Run P0571 against the car in front of you
Enter the code and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.