Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY2011MARINER PREMIER, 2.5 7, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - POWERTRAIN DTC CHARTS & DESCRIPTIONS - DTC P0218 THROUGH DTC P0581 - (EXCEPT DIESEL & HYBRID)DTC P0571: BRAKE SWITCH A CIRCUIT
2011 Mercury Mariner Premier, 2.5 7, AWD
DTC P0571: Brake Switch A Circuit
2011 Mercury Mariner Premier, 2.5 7, AWDSECTION DTC P0571: Brake Switch A Circuit
P0571 - BRAKE SWITCH A CIRCUIT
| Description: | The purpose of this DTC is to check whether the brake switch has toggled or not during the key ON engine running (KOER) test. | ||
| Possible Causes: |
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| Diagnostic Aids: | Using the scan tool, check the BPP/BOO PID. The BPP/BOO PID should toggle on and off with brake pedal activation. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | GO to PINPOINT TEST FD . | ||
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.