AutoCodes – Buick – P0724 Buick

P0724 Buick Code - Brake Switch Circuit High Input

Quick Answer

The brake switch indicates brake pedal status to the Powertrain Control Module (PCM). Common causes include Faulty Brake Switch, Brake Switch harness is open or shorted, Brake Switch circuit poor electrical connection. 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: P0724 Buick indicates Brake Switch Circuit High Input.
Common causes: Common causes include Faulty Brake Switch, Brake Switch harness is open or shorted, Brake Switch circuit poor electrical connection.
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 2,867

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0724 Buick Description

The brake switch indicates brake pedal status to the Powertrain Control Module (PCM). The brake switch is a normally-closed switch that supplies battery voltage on circuit 420 to the PCM. Applying the brake pedal opens the switch, interrupting voltage to the PCM. When the brake pedal is released, the PCM receives a constant voltage signal. If the PCM receives a zero voltage signal at the brake switch input, and the torque converter clutch (TCC) is engaged, the PCM de-energizes the TCC solenoid valve. The PCM disregards the brake switch input for TCC scheduling if there is a brake switch circuit fault.

OBDII Code P0724 Buick - Brake Switch Circuit High Input - AutoCodes.com — P0724 Buick Code - Brake Switch Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0724 Buick?

Faulty Brake Switch
Brake Switch harness is open or shorted
Brake Switch circuit poor electrical connection
Misadjusted Brake Switch

How to Fix the DTC P0724 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 P0724 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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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 P0724 Buick Code

1. What does the OBDII code P0724 mean on a Buick?

P0724 indicates a problem with the Brake Switch Circuit, specifically a high input signal, which may affect the vehicle's transmission or cruise control system.

2. What are the common symptoms of a P0724 code on a Buick?

Symptoms may include the brake lights staying on or not functioning, issues with cruise control operation, difficulty shifting gears, or the Check Engine Light being illuminated.

3. What causes the P0724 code to appear in a Buick?

Common causes include a faulty brake light switch, damaged wiring, corroded connectors, or a malfunctioning brake pedal sensor.

4. Can a P0724 code affect my Buickâ€™s transmission?

Yes, the P0724 code can cause transmission issues, such as the inability to shift out of park or erratic shifting due to incorrect brake signal input.

5. How can I diagnose the P0724 code in my Buick?

Start by inspecting the brake light switch, wiring, and connectors for damage or corrosion. Use a multimeter to test the switch for proper function and check for high resistance in the circuit.

6. Is it safe to drive my Buick with a P0724 code?

Driving with this code can be unsafe if the brake lights arenâ€™t working or the transmission is affected. Address the issue as soon as possible to avoid further problems.

7. How do I repair a P0724 code on a Buick?

Repairs may involve replacing the brake light switch, repairing or replacing damaged wiring, cleaning corroded connectors, or recalibrating the brake pedal sensor.

8. Can a P0724 code cause the cruise control to stop working?

Yes, a faulty brake switch circuit can disrupt the cruise control system, as it relies on accurate brake input signals to function properly.

9. How much does it cost to fix a P0724 code on a Buick?

The cost varies depending on the cause, but replacing a brake light switch typically costs between $50 and $150 for parts and labor.

10. Will clearing the P0724 code fix the problem in my Buick?

Clearing the code may temporarily turn off the Check Engine Light, but the underlying issue must be diagnosed and repaired to prevent the code from returning.