Engine-CodesLexus – P0572 Lexus

P0572 Lexus Code - Cruise Control/Brake Switch 'A' Circuit Low

Quick Answer

The P0572 diagnostic trouble code (DTC) for Lexus vehicles indicates an issue with the Cruise Control/Brake Switch 'A' Circuit being low. Common causes include Faulty brake switch, Damaged wiring or connectors in the circuit, Corrosion or poor connection in the brake switch circuit. 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 Lexus indicates Cruise Control/Brake Switch 'A' Circuit Low.
Common causes
Common causes include Faulty brake switch, Damaged wiring or connectors in the circuit, Corrosion or poor connection in the brake switch circuit.
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 Lexus Description

The P0572 diagnostic trouble code (DTC) for Lexus vehicles indicates an issue with the Cruise Control/Brake Switch 'A' Circuit being low. This means that the power signal being sent to the cruise control system from the brake switch is lower than the specified threshold, causing the system to not function properly. The cruise control system relies on input from the brake switch to deactivate the cruise control when the brakes are applied. When the circuit is low, it can lead to erratic behavior in the cruise control system, such as not disengaging when the brakes are applied.

OBDII Code P0572 Lexus - Cruise Control/Brake Switch 'A' Circuit Low
P0572 Lexus Code - Cruise Control/Brake Switch 'A' Circuit Low

Common Causes of P0572 Lexus

  1. Faulty brake switch
  2. Damaged wiring or connectors in the circuit
  3. Corrosion or poor connection in the brake switch circuit
  4. Defective cruise control module
  5. Electronic control unit (ECU) issues

Symptoms of P0572 Lexus

  1. Cruise control not disengaging when the brakes are applied
  2. Inability to set or maintain a speed with cruise control
  3. Cruise control light flashing or not illuminating
  4. Check Engine Light (CEL) illuminated on the dashboard
  5. Erratic behavior in the vehicle's electronic systems

How to Fix P0572 Lexus

  1. Begin by diagnosing the issue using a diagnostic scanner to confirm the P0572 code and pinpoint the exact cause of the problem.
  2. Inspect the brake switch, wiring, and connectors for any visible damage, corrosion, or loose connections. Replace or repair as necessary.
  3. Test the brake switch with a multimeter to ensure it is functioning correctly and sending the proper signal to the cruise control system.
  4. Check the cruise control module and ECU for any faults or malfunctions. Replace components if needed.
  5. Clear the DTC from the vehicle's computer system and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P0572 Lexus

The typical repair costs for addressing the P0572 code in a Lexus vehicle can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Rates may be higher at dealerships or in metropolitan areas, while independent shops often charge less. For a more accurate estimate, it is advisable to consult with a local auto repair shop.

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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