AutoCodes – Ford – P0571 2012 Ford Fusion

P0571 2012 Ford Fusion Code - Brake Switch 'A' Circuit

Quick Answer

When the brake pedal is depressed, the stop light switch sends a signal to the Engine Control Module (ECM). Common causes include Faulty Brake Switch, Misadjusted brake switch, Brake Switch harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0571 2012 Ford Fusion indicates Brake Switch 'A' Circuit.
Common causes: Common causes include Faulty Brake Switch, Misadjusted brake switch, Brake Switch harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 2,980

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0571 2012 Ford Fusion Description

When the brake pedal is depressed, the stop light switch sends a signal to the Engine Control Module (ECM). When the ECM receives this signal, it cancels the cruise control.

OBDII Code P0571 2012 Ford Fusion - Brake Switch 'A' Circuit - AutoCodes.com — P0571 2012 Ford Fusion Code - Brake Switch 'A' Circuit

What does this mean?

What are the Possible Causes of the DTC P0571 2012 Ford Fusion?

Faulty Brake Switch
Misadjusted brake switch
Brake Switch harness is open or shorted
Brake Switch circuit poor electrical connection

How to Fix the DTC P0571 2012 Ford Fusion?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

Check the bulb and fuse first, if they are good replace the stop lamp switch (it is located behind the brake pedal)

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0571 2012 Ford Fusion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0571 2012 Ford Fusion code?

Need more information on how to fix the P0571 2012 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0571 2012 Ford Fusion Code

What does OBDII code P0571 mean for a 2012 Ford Fusion?

Code P0571 indicates an issue with the Brake Switch 'A' Circuit, which monitors the brake pedal's position and communicates with various vehicle systems.

What are common symptoms of code P0571 in a 2012 Ford Fusion?

Symptoms may include the brake lights not working, cruise control malfunctioning, or difficulty shifting out of park.

What causes code P0571 in a 2012 Ford Fusion?

Common causes include a faulty brake light switch, damaged wiring or connectors in the brake switch circuit, or corrosion affecting the electrical connections.

Can code P0571 affect vehicle safety?

Yes, if the brake lights fail to illuminate, it can pose a safety risk by preventing other drivers from knowing when you're braking.

How can I diagnose code P0571 in a 2012 Ford Fusion?

Start by checking the brake lights for proper operation, inspect the brake light switch for damage, and verify the wiring and connectors for continuity and corrosion.

Can a faulty brake light switch trigger code P0571?

Yes, a malfunctioning brake light switch is one of the most common causes of this code.

Will code P0571 turn on the check engine light?

Yes, this code typically activates the check engine light to alert the driver of the issue.

How do I fix code P0571 in a 2012 Ford Fusion?

Repairs may include replacing the brake light switch, repairing or replacing damaged wiring, or cleaning corroded connectors in the circuit.

How much does it cost to repair code P0571 in a 2012 Ford Fusion?

Repair costs vary but generally range between $50 and $200, depending on whether the issue is with the brake light switch or wiring.

Can I drive my 2012 Ford Fusion with code P0571?

While the car may still function, driving with this code is not recommended due to potential safety risks like non-functional brake lights or cruise control issues.