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.

🖨️

Home » OBD2 Codes » C0048

Code C0048

Symptoms

• ABS warning light illuminated

• Traction control system not functioning

• Unusual braking behavior

Common Causes

• Faulty wheel speed sensor

• Damaged wiring or connectors

• Malfunctioning ABS module

Glossary

ABS: Anti-lock Braking System

OBD-II: On-Board Diagnostics, Second Generation

Related Codes

• C0045

• C0046

Laymans terms

This code means there's a problem with one of the car's wheels. It's like when your bike wheel doesn't spin right because something is stuck or broken.

Explanation

The C0048 code indicates an issue with the wheel speed sensor on one of the wheels.

Technical description

C0048 is a chassis code related to the wheel speed sensor circuit. It typically indicates a malfunction in the sensor or its wiring, affecting the vehicle's anti-lock braking system (ABS).

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wheel speed sensor and wiring for damage.

• Test the sensor with a multimeter for proper operation.

Repair procedures

• Replace the faulty wheel speed sensor.

• Repair or replace damaged wiring or connectors.

• Reset the ABS system and clear the code.

Tools required

• OBD-II scanner

• Multimeter

• Socket set

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• Ford F-150

• Toyota Camry

Preventive measures

• Regularly inspect wheel sensors and wiring.

• Avoid driving through deep water.

• Perform routine maintenance checks.

Error code type

Sensor Issue

User experience recommendations

• Drive cautiously until the issue is resolved.

• Avoid sudden braking if ABS is not functioning.

Warranty information

Check with your vehicle manufacturer for warranty coverage on ABS components.

Historical data

C0048 has been a common issue in vehicles with advanced ABS systems introduced in the late 1990s.

Urgency level

Moderate – Should be addressed soon to ensure proper braking performance.

Legal and safety notice

Driving with a malfunctioning ABS can affect vehicle safety. Address this issue promptly.

Testing conditions

• Vehicle parked on a flat surface

• Ignition in the 'On' position

Component location

The wheel speed sensor is located at the wheel hub assembly of each wheel.

FAQs

Q: Can I drive with the C0048 code?
A: It's possible to drive, but it's not recommended as your ABS may not function properly.

Q: How do I reset the ABS light?
A: After repairs, use an OBD-II scanner to clear the code and reset the ABS light.

Last updated: Feb 1, 2026 • Source: internal database

Diagnose Your Check Engine Light