What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

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Home » OBD2 Codes » C0571

Code C0571

Symptoms

• ABS warning light on

• Traction control system light on

• Cruise control not functioning

Common Causes

• Faulty brake switch

• Wiring issues in the brake switch circuit

• Malfunctioning Electronic Brake Control Module (EBCM)

Glossary

EBCM: Electronic Brake Control Module

ABS: Anti-lock Braking System

Related Codes

• C0572

• C0573

Laymans terms

This code means that there's a problem with a part of the car that helps it stop safely. It's like when you press the brakes on your bike and they don't work right.

Explanation

The C0571 code indicates an issue with the brake switch circuit, which affects the vehicle's braking system.

Technical description

C0571 is a chassis code related to the brake switch circuit malfunction. This code is triggered when the Electronic Brake Control Module (EBCM) detects a problem with the brake switch input, which can affect the vehicle's braking performance and stability control functions.

Diagnosis steps

• Check the brake switch for proper operation.

• Inspect the wiring and connectors in the brake switch circuit.

• Test the Electronic Brake Control Module (EBCM) for faults.

Repair procedures

• Replace the faulty brake switch.

• Repair or replace damaged wiring or connectors.

• Replace the Electronic Brake Control Module (EBCM) if necessary.

Tools required

• Multimeter

• OBD-II scanner

• Basic hand tools

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• GMC Sierra

• Cadillac Escalade

Preventive measures

• Regularly inspect brake system components.

• Ensure proper maintenance of electrical systems.

• Address warning lights promptly.

Error code type

Sensor Issue

User experience recommendations

• Do not ignore warning lights on the dashboard.

• Have your vehicle inspected by a professional if you notice braking issues.

Warranty information

Check with your vehicle manufacturer for warranty coverage on brake system components.

Historical data

C0571 has been a common code in vehicles with electronic brake systems, often related to brake switch failures.

Urgency level

High – This code affects the vehicle's braking performance and should be addressed immediately to ensure safety.

Legal and safety notice

Driving with a malfunctioning brake system can be dangerous and may violate vehicle safety regulations.

Testing conditions

• Vehicle stationary with engine running

• Brake pedal pressed

Component location

The brake switch is typically located near the brake pedal assembly.

FAQs

Q: What happens if I ignore the C0571 code?
A: Ignoring the C0571 code can lead to reduced braking performance and increased risk of accidents.

Q: Can I drive with the C0571 code?
A: It's not recommended to drive with this code active as it affects the vehicle's braking system.

Last updated: Apr 20, 2026 • Source: internal database

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