AutoCodes – Ford – P0504 2012 Ford Fusion

P0504 2012 Ford Fusion Code - Brake Switch Circuit 'A' / 'B' Correlation

Quick Answer

The Brake Pedal Switch (BPS) is sometimes referred to as the stop lamp switch. Common causes include Faulty Brake Pedal Switch (BPS) (Stop Lamp Switch), Faulty Brake Pedal Position (BPP) Switch, Brake Pedal 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: P0504 2012 Ford Fusion indicates Brake Switch Circuit 'A' / 'B' Correlation.
Common causes: Common causes include Faulty Brake Pedal Switch (BPS) (Stop Lamp Switch), Faulty Brake Pedal Position (BPP) Switch, Brake Pedal 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 5,902

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Basic DIY (1 / 3)

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Table of contents Created and updated by William Orellana on Jul 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0504 2012 Ford Fusion Description

The Brake Pedal Switch (BPS) is sometimes referred to as the stop lamp switch. The BPS provides a signal to the Powertrain Control Module (PCM) indicating the brakes are applied. The BPS is normally open and mounted on the brake pedal support. The Powertrain Control Module does a comparison test between the Brake Pedal Switch and the Brake Pedal Position (BPP) switch. The Diagnostic Trouble Code (DTC) will set when the BPS and BPP are no to factory specifications.

OBDII Code P0504 2012 Ford Fusion - Brake Switch Circuit 'A' / 'B' Correlation - AutoCodes.com — P0504 2012 Ford Fusion Code - Brake Switch Circuit 'A' / 'B' Correlation

What does this mean?

What are the Possible Causes of the DTC P0504 2012 Ford Fusion?

Faulty Brake Pedal Switch (BPS) (Stop Lamp Switch)
Faulty Brake Pedal Position (BPP) Switch
Brake Pedal Switch harness is open or shorted
Brake Pedal Switch circuit poor electrical connection

How to Fix the DTC P0504 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0504 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 P0504 2012 Ford Fusion code?

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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 P0504 2012 Ford Fusion Code

1. What does OBDII code P0504 for a 2012 Ford Fusion indicate?

The code P0504 in a 2012 Ford Fusion refers to the Brake Switch Circuit 'A' / 'B' Correlation issue.

2. What are the common symptoms of OBDII code P0504 in a 2012 Ford Fusion?

Common symptoms of OBDII code P0504 in a 2012 Ford Fusion include erratic cruise control operation, illuminated brake warning light, and potential issues with shifting out of park.

3. What are the possible causes of OBDII code P0504 in a 2012 Ford Fusion?

Potential causes of code P0504 in a 2012 Ford Fusion include a faulty brake light switch, damaged wiring in the brake switch circuit, or a misaligned brake pedal position sensor.

4. How can I diagnose the OBDII code P0504 in my 2012 Ford Fusion?

To diagnose code P0504 in a 2012 Ford Fusion, you can start by checking the brake light switch for proper operation, inspecting the wiring for any damage, and ensuring the brake pedal position sensor is correctly aligned.

5. Can I still drive my 2012 Ford Fusion with OBDII code P0504?

It is not recommended to drive your 2012 Ford Fusion with OBDII code P0504, as it can affect the proper functioning of crucial systems like cruise control and transmission shifting. It is best to address the issue promptly.

6. How do I repair OBDII code P0504 in my 2012 Ford Fusion?

Repairing OBDII code P0504 in a 2012 Ford Fusion typically involves replacing the faulty brake light switch, repairing any damaged wiring, or realigning the brake pedal position sensor as needed.

7. Can a DIY enthusiast fix OBDII code P0504 in a 2012 Ford Fusion?

DIY enthusiasts with automotive repair experience may be able to address OBDII code P0504 in a 2012 Ford Fusion by following repair guides, but it's recommended to consult a professional if you're unsure or inexperienced.

8. How much does it cost to repair OBDII code P0504 in a 2012 Ford Fusion?

The cost of repairing OBDII code P0504 in a 2012 Ford Fusion can vary depending on the specific cause of the issue, parts needed for replacement, and labor costs at your chosen repair shop or dealership.

9. Will resetting the OBDII code P0504 in my 2012 Ford Fusion make it go away permanently?

Resetting the OBDII code P0504 in a 2012 Ford Fusion may temporarily clear the code, but if the underlying issue such as a faulty brake light switch or damaged wiring is not addressed, the code is likely to reappear.

10. How important is it to address OBDII code P0504 in a 2012 Ford Fusion promptly?

It is crucial to address OBDII code P0504 in a 2012 Ford Fusion promptly to ensure the proper functioning of essential vehicle systems and prevent potential safety hazards associated with brake light and cruise control malfunctions.