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Engine-Codes – Ford – P0573 Ford

P0573 Ford Code - Brake Switch 'A' Circuit High

Quick Answer

The P0573 Ford diagnostic trouble code indicates that there is a high voltage condition in the brake switch 'A' circuit of the vehicle. Common causes include Faulty brake switch, Damaged wiring or connectors in the brake switch circuit, ECM malfunction. 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
P0573 Ford indicates Brake Switch 'A' Circuit High.
Common causes
Common causes include Faulty brake switch, Damaged wiring or connectors in the brake switch circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P0573 Ford Description

The P0573 Ford diagnostic trouble code indicates that there is a high voltage condition in the brake switch 'A' circuit of the vehicle. The brake switch is a crucial component that communicates with the vehicle's electronic control module (ECM) to inform it when the brakes are being applied. When the brake pedal is pressed, the brake switch closes the circuit, sending a signal to the ECM to activate the brake lights and other related systems. The high voltage in the circuit may be caused by a malfunction in the brake switch itself, wiring issues, or problems with the ECM.

OBDII Code P0573 Ford - Brake Switch 'A' Circuit High
P0573 Ford Code - Brake Switch 'A' Circuit High

Common Causes of P0573 Ford

  1. Faulty brake switch
  2. Damaged wiring or connectors in the brake switch circuit
  3. ECM malfunction
  4. Corrosion in the brake switch circuit
  5. Short circuit in the brake switch wiring

Symptoms of P0573 Ford

  1. Brake lights staying on continuously
  2. Inability to engage or disengage cruise control
  3. Traction control system malfunctions
  4. Difficulty shifting out of park
  5. Illumination of the brake warning light on the dashboard

How to Fix P0573 Ford

  1. Begin by locating the brake switch, typically located near the brake pedal under the dashboard.
  2. Inspect the wiring and connectors for any signs of damage, corrosion, or wear. Replace as necessary.
  3. Test the brake switch using a multimeter to verify if it is functioning properly. Replace if faulty.
  4. Clear the diagnostic trouble codes from the ECM using an OBD-II scanner.
  5. Test drive the vehicle to ensure the issue has been resolved and that all systems are functioning correctly.

Cost to Fix P0573 Ford

The cost of repairing a P0573 Ford code can vary depending on the specific cause of the issue. In general, the cost of replacing a brake switch can range from $50 to $200, while addressing wiring or ECM problems may be more expensive. Labor costs can add an additional $80 to $150 per hour, and the total repair bill may amount to $150 to $500 or more. It is recommended to consult with a qualified mechanic to get an accurate estimate based on the vehicle's make and model, as well as the extent of the repairs needed.

What does this mean?

Tech Notes for P0573 Ford

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

When is the Code Detected?

The P0573 codes is set when the stop light switch signal is too high.

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Information for Specific Ford Models

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.

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