AutoCodes – Mazda – P1572 Mazda

P1572 Mazda Code - Brake Pedal Switch Circuit Malfunction

Quick Answer

Indicates that the brake input rationality test for Brake Pedal Position (BPP) and Brake Pressure Applied (BPA) switches has failed. Common causes include Faulty Brake Pedal Switch, Blown fuse, Brake Pedal Switch 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: P1572 Mazda indicates Brake Pedal Switch Circuit Malfunction.
Common causes: Common causes include Faulty Brake Pedal Switch, Blown fuse, Brake Pedal Switch 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 2,386

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 Aug 30, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1572 Mazda Description

Indicates that the brake input rationality test for Brake Pedal Position (BPP) and Brake Pressure Applied (BPA) switches has failed. One or both inputs to the Powertrain Control Module (PCM) did not change state when it was expected to. On vehicles with stability assist. BPP is connected to the ABS module and the ABS generates a Driver Brake Application (DBA) signal, which is then sent to the PCM.

OBDII Code P1572 Mazda - Brake Pedal Switch Circuit Malfunction - AutoCodes.com — P1572 Mazda Code - Brake Pedal Switch Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1572 Mazda?

Faulty Brake Pedal Switch
Blown fuse
Brake Pedal Switch harness is open or shorted
Brake Pedal Switch circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1572 Mazda?

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 P1572 Mazda 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.

Need more information about the P1572 Mazda 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 P1572 Mazda Code

1. What does the OBDII code P1572 mean on a Mazda?

P1572 indicates a Brake Pedal Switch Circuit Malfunction, meaning the engine control module (ECM) has detected an issue with the signal from the brake pedal switch.

2. What are the common symptoms of code P1572 in a Mazda?

Symptoms may include the brake lights not working, the cruise control being disabled, difficulty shifting out of park (in automatic transmissions), or no noticeable symptoms at all.

3. What causes the P1572 code to appear on a Mazda?

Common causes include a faulty brake pedal switch, damaged or corroded wiring/connectors, or a misaligned or stuck brake pedal switch.

4. Can I drive my Mazda with the P1572 code?

While the car may still be drivable, issues like non-functional brake lights or cruise control can pose safety risks. Itâ€™s best to address the issue promptly.

5. How can I fix the P1572 code on my Mazda?

Check the brake pedal switch for proper operation, inspect the wiring for damage or corrosion, and ensure the switch is correctly aligned. Replace the switch if necessary.

6. How do I know if the brake pedal switch is faulty?

Use a multimeter to test the switch for proper continuity when the brake pedal is pressed and released. If it fails the test, the switch is likely defective.

7. Is the P1572 code specific to a Mazda model?

No, the P1572 code can appear on various Mazda models, but the exact location of the switch or wiring may vary depending on the vehicle.

8. Will clearing the P1572 code solve the problem permanently?

Clearing the code may turn off the check engine light temporarily, but if the underlying issue isnâ€™t fixed, the code will likely return.

9. How much does it cost to repair a P1572 code on a Mazda?

The cost depends on the issue. Replacing a brake pedal switch may cost $50â€“$150 for parts and labor, while fixing wiring issues could be more expensive.

10. Can a faulty brake pedal switch cause other problems in my Mazda?

Yes, in addition to triggering P1572, it can lead to safety issues like non-functional brake lights and may affect features like the cruise control or shift interlock system.