Engine-CodesMercury – P0572 Mercury

P0572 Mercury Code - Brake Switch 'A' Circuit Low

Quick Answer

The P0572 diagnostic trouble code (DTC) specifically refers to the Brake Switch 'A' Circuit Low in Mercury vehicles. Common causes include Faulty brake switch, Wiring issues in the brake switch circuit, Electronic control module (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
P0572 Mercury indicates Brake Switch 'A' Circuit Low.
Common causes
Common causes include Faulty brake switch, Wiring issues in the brake switch circuit, Electronic control module (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.
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0572 Mercury Description

The P0572 diagnostic trouble code (DTC) specifically refers to the Brake Switch 'A' Circuit Low in Mercury vehicles. This code indicates that there is a malfunction in the circuit related to the brake switch, which is responsible for detecting when the brake pedal is pressed. The brake switch plays a crucial role in various vehicle systems, including the brake lights, cruise control, and transmission shift interlock. When the brake pedal is depressed, the brake switch sends a signal to these systems to activate or deactivate certain functions.

OBDII Code P0572 Mercury - Brake Switch 'A' Circuit Low
P0572 Mercury Code - Brake Switch 'A' Circuit Low

Common Causes of P0572 Mercury

  1. Faulty brake switch
  2. Wiring issues in the brake switch circuit
  3. Electronic control module (ECM) malfunction
  4. Corrosion or damage to electrical connections
  5. Defective brake light switch relay

Symptoms of P0572 Mercury

  1. Brake lights not working properly
  2. Cruise control not engaging or disengaging
  3. Transmission shift interlock malfunction
  4. Inability to start the vehicle
  5. Gear shifter stuck in a certain position

How to Fix P0572 Mercury

  1. Begin by inspecting the brake switch and its wiring for any visible damage or corrosion.
  2. Test the brake switch using a multimeter to check for continuity and proper voltage levels.
  3. Replace the brake switch if it is found to be faulty.
  4. Check and repair any damaged wiring or connections in the brake switch circuit.
  5. Clear the DTC and test the vehicle to ensure that the issue has been resolved.

Cost to Fix P0572 Mercury

The cost of repairing a P0572 Brake Switch 'A' Circuit Low code can vary depending on the extent of the issue and the specific parts that need to be replaced. On average, the cost of replacing a brake light switch ranges from $50 to $150, including parts and labor. However, additional costs may be incurred if there are wiring or ECM issues that need to be addressed. It is recommended to consult with a professional mechanic to get an accurate estimate based on the specific circumstances of your Mercury vehicle.

Tech Notes for P0572 Mercury

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 P0572 codes is set when the stop light switch signal is too low.

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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.

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