Engine-Codes - Ford - P0504 2008 Ford Fusion

P0504 2008 Ford Fusion Code - Brake Switch Circuit 'A' / 'B' Correlation

- Code Popularity: 2,692 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 1/3
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What are the Possible Causes of the DTC P0504 2008 Ford Fusion?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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
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How to Fix the DTC P0504 2008 Ford Fusion?

Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

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What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0504 2008 Ford Fusion code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P0504 2008 Ford Fusion Code Mean?

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.

P0504 2008 Ford Fusion Code - Brake Switch Circuit 'A' / 'B' Correlation

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