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 » C0015

Code C0015

Symptoms

• ABS warning light on

• Traction control light on

• Loss of anti-lock braking functionality

Common Causes

• Faulty wheel speed sensor

• Damaged wiring or connectors

• Malfunctioning ABS module

Glossary

ABS: Anti-lock Braking System

DTC: Diagnostic Trouble Code

Related Codes

• C0010

• C0016

Laymans terms

This code means there's a problem with the car's brakes. It's like when your bike's brakes don't work right, making it hard to stop.

Explanation

The C0015 code indicates an issue with the left front wheel speed sensor, which is part of the car's braking system.

Technical description

C0015 is a diagnostic trouble code (DTC) for 'Left Front Wheel Speed Sensor Circuit Range/Performance'. This means the vehicle's computer has detected a problem with the signal from the left front wheel speed sensor, which is crucial for the anti-lock braking system (ABS) to function properly.

Diagnosis steps

• Check for any ABS-related warning lights on the dashboard.

• Inspect the left front wheel speed sensor and its wiring for damage.

• Use a diagnostic scanner to read and clear the code, then test drive to see if it returns.

Repair procedures

• Replace the left front wheel speed sensor if faulty.

• Repair or replace damaged wiring or connectors.

• Replace the ABS module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Jack and jack stands

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Camry

• Ford F-150

• Honda Accord

Preventive measures

• Regularly inspect wheel speed sensors and wiring.

• Keep the ABS system clean and free of debris.

• Perform routine maintenance checks.

Error code type

Sensor Issue

User experience recommendations

• Drive cautiously and avoid hard braking.

• Get the vehicle inspected by a professional as soon as possible.

Warranty information

Check if the vehicle's warranty covers ABS components.

Historical data

This code has been commonly reported in vehicles with high mileage or those frequently driven in harsh conditions.

Urgency level

Moderate – It is important to address this issue to ensure proper braking performance.

Legal and safety notice

Driving with a malfunctioning ABS can increase stopping distances and risk of accidents.

Testing conditions

• Vehicle parked on a level surface

• Ignition turned off before inspection

Component location

The left front wheel speed sensor is located near the wheel hub assembly of the front left wheel.

FAQs

Q: Can I drive with a C0015 code?
A: It's possible to drive, but it's not recommended as your ABS may not function properly, affecting braking performance.

Q: How do I reset the ABS light?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, the ABS light should turn off.

Last updated: Oct 28, 2025 • Source: internal database

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