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 » C0002

Code C0002

Symptoms

• ABS warning light on

• Reduced braking performance

• Unusual brake pedal feel

Common Causes

• Faulty brake pressure sensor

• Damaged brake lines

• Malfunctioning ABS module

Glossary

ABS: Anti-lock Braking System

OBD-II: On-Board Diagnostics, Second Generation

Related Codes

• C0001

• C0003

Laymans terms

This code means there is a problem with the car's brakes. It's like when your bicycle brakes don't work right, and you can't stop easily.

Explanation

C0002 is a generic chassis code related to the brake system.

Technical description

The C0002 code indicates an issue within the vehicle's brake system, potentially involving the brake pressure sensor or hydraulic system. This can affect the vehicle's ability to stop effectively.

Diagnosis steps

• Check the ABS warning light and retrieve the code.

• Inspect brake pressure sensor and wiring for damage.

• Test the ABS module functionality.

Repair procedures

• Replace the faulty brake pressure sensor.

• Repair or replace damaged brake lines.

• Reprogram or replace the ABS module.

Tools required

• OBD-II scanner

• Multimeter

• Brake line wrench

Estimated repair cost

$150 - $500

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regular brake system maintenance

• Check brake fluid levels

• Inspect brake lines for wear

Error code type

Brake System Issue

User experience recommendations

• Do not drive the vehicle if braking is severely affected.

• Have the vehicle inspected by a professional mechanic.

Warranty information

Check with your vehicle manufacturer for brake system warranty coverage.

Historical data

This code has been associated with brake system issues in various vehicle models, often related to sensor malfunctions.

Urgency level

High – Brake issues can significantly affect vehicle safety and should be addressed immediately.

Legal and safety notice

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

Testing conditions

• Vehicle parked on a level surface

• Engine running

Component location

The brake pressure sensor is typically located near the master cylinder in the engine bay.

FAQs

Q: Can I drive my car with a C0002 code?
A: It's not recommended to drive the car until the brake issue is resolved, as it can affect your ability to stop safely.

Q: How do I reset the C0002 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, the code will return.

Last updated: Jan 15, 2026 • Source: internal database

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