AutoCodes – Buick – P0572 Buick

P0572 Buick Code - Brake Switch Circuit Low Voltage

Quick Answer

The Brake Pedal Position Sensor signal circuit is a B+ input from the Body Control Module (BCM) to the Engine Control Module (ECM). Common causes include Faulty Brake Pedal Position Sensor, Misadjusted Brake Pedal Position Sensor, Brake Pedal Position Sensor 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: P0572 Buick indicates Brake Switch Circuit Low Voltage.
Common causes: Common causes include Faulty Brake Pedal Position Sensor, Misadjusted Brake Pedal Position Sensor, Brake Pedal Position Sensor 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 297

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 14, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0572 Buick Description

The Brake Pedal Position Sensor signal circuit is a B+ input from the Body Control Module (BCM) to the Engine Control Module (ECM). The BCM and ECM monitor the Brake Pedal Position Sensor signal circuit to detect when the brake pedal has been applied. When the brake pedal is applied, the BCM supplies B+ on the stop lamp signal circuit and also sends a serial data message to the ECM indicating that the brake pedal has been applied. This Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to ground or an open on the discrete brake signal circuit when the serial data message from the BCM indicates the brakes are applied. This diagnostic will run when the serial data message and the voltage signal on the brake switch signal circuit do not match for 8 out 10 times, and the condition is present for greater than 2 s.

OBDII Code P0572 Buick - Brake Switch Circuit Low Voltage - AutoCodes.com — P0572 Buick Code - Brake Switch Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0572 Buick?

Faulty Brake Pedal Position Sensor
Misadjusted Brake Pedal Position Sensor
Brake Pedal Position Sensor harness is open or shorted
Brake Pedal Position Sensor circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC P0572 Buick?

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 P0572 Buick 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.

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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 P0572 Buick Code

1. What are the common symptoms of OBDII code P0572 (Brake Switch Circuit Low Voltage) in a Buick?

- Common symptoms include the brake lights staying on, cruise control not working, and the inability to shift out of park.

2. What could cause the P0572 code to trigger in a Buick?

- The code is typically triggered by a faulty brake light switch, damaged wiring, or a poor electrical connection in the brake light circuit.

3. How can I diagnose the cause of the P0572 code in my Buick?

- You can start by checking the brake light switch for proper operation, inspecting the wiring for any damage, and testing the circuit with a multimeter to identify any voltage irregularities.

4. Can a faulty brake switch affect the overall performance of the vehicle in addition to triggering the P0572 code?

- Yes, a faulty brake switch can affect the vehicle's transmission shifting, cruise control operation, and may even lead to safety concerns due to malfunctioning brake lights.

5. Is it safe to continue driving with the P0572 code illuminated in a Buick?

- It is not recommended to drive with the P0572 code active, as it can lead to potential safety hazards such as the brake lights not functioning properly.

6. How can I repair the P0572 code in my Buick?

- Repairing the P0572 code usually involves replacing the faulty brake light switch, repairing any damaged wiring, and ensuring a secure electrical connection in the brake light circuit.

7. Can I clear the P0572 code with an OBDII scanner, or does it require additional steps?

- Clearing the P0572 code with an OBDII scanner is possible after fixing the underlying issue causing the code. However, if the problem persists, the code will likely reappear.

8. Are there any DIY tips for troubleshooting the P0572 code in a Buick before seeking professional help?

- You can start by checking the brake light switch adjustment, inspecting the fuse related to the brake lights, and ensuring all electrical connections are secure before seeking professional assistance.

9. How much does it typically cost to repair the P0572 code in a Buick at a mechanic or dealership?

- The cost of repairing the P0572 code can vary depending on the extent of the issue and labor rates, but it generally ranges from $100 to $300 for parts and labor.

10. Will fixing the P0572 code improve the overall performance and safety of my Buick?

- Yes, resolving the P0572 code will not only eliminate the warning light but also restore proper brake light functionality, transmission shifting, and cruise control operation, improving both performance and safety.