Engine-CodesBuick – P1574 Buick

P1574 Buick Code - Stop Lamp Switch Circuit

Quick Answer

The P1574 Buick code refers to an issue with the Stop Lamp Switch Circuit in the vehicle. Common causes include Faulty stop lamp switch, Damaged wiring or connectors in the stop lamp switch circuit, Corrosion or debris affecting the connections. 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
P1574 Buick indicates Stop Lamp Switch Circuit.
Common causes
Common causes include Faulty stop lamp switch, Damaged wiring or connectors in the stop lamp switch circuit, Corrosion or debris affecting the connections.
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 10, 2024
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Code P1574 Buick Description

The P1574 Buick code refers to an issue with the Stop Lamp Switch Circuit in the vehicle. The stop lamp switch is a critical component of the vehicle's brake system that communicates with the vehicle's onboard computer to indicate when the brakes are being applied. When the stop lamp switch malfunctions or fails, it can lead to various issues with the vehicle's performance and safety systems.

OBDII Code P1574 Buick - Stop Lamp Switch Circuit
P1574 Buick Code - Stop Lamp Switch Circuit

Common Causes of P1574 Buick

  1. Faulty stop lamp switch.
  2. Damaged wiring or connectors in the stop lamp switch circuit.
  3. Corrosion or debris affecting the connections.
  4. Issues with the vehicle's computer system.
  5. Electrical issues such as a blown fuse or relay.

Symptoms of P1574 Buick

  1. Brake lights not illuminating when the brake pedal is pressed.
  2. Brake lights staying on constantly, even when the brake pedal is not pressed.
  3. Cruise control not working properly.
  4. Vehicle not shifting out of park.
  5. ABS or traction control warning lights on the dashboard.

How to Fix P1574 Buick

  1. Begin by locating the stop lamp switch, typically located near the brake pedal.
  2. Inspect the wiring and connectors for any damage or corrosion. Repair or replace as necessary.
  3. Test the stop lamp switch using a multimeter to check for continuity when the brake pedal is pressed.
  4. If the switch is faulty, replace it with a new one and adjust it to ensure proper operation.
  5. Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.

Cost to Fix P1574 Buick

The cost of repairing the P1574 Buick code can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $100 to $300 for parts and labor. However, this estimate may be higher or lower based on the severity of the problem and the required repairs. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate. Labor rates typically range from $80 to $150 per hour, but can be higher in metropolitan areas or at dealerships.

When is the Code Detected?

The Powertrain Control Module (PCM) does not detect a stop lamp switch transition

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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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