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Code C0023

Symptoms

• ABS warning light on

• Poor braking performance

• Unusual noises during braking

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

• C0020

• C0021

Laymans terms

This code means there's a problem with the car's wheel speed sensor. It's like when a toy car's wheel isn't spinning right, so it can't go straight.

Explanation

The C0023 code indicates an issue with the wheel speed sensor for one of the wheels, which is crucial for the anti-lock braking system (ABS).

Technical description

The C0023 code is set when the ABS module detects a malfunction in the wheel speed sensor circuit. This sensor is responsible for monitoring the speed of a specific wheel and providing data to the ABS system to prevent wheel lock-up during braking.

Diagnosis steps

• Inspect the wheel speed sensor and wiring for damage.

• Use a multimeter to test the sensor's electrical resistance.

• Check the ABS module for any additional error codes.

Repair procedures

• Replace the faulty wheel speed sensor.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the ABS module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Socket set

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regularly inspect wheel sensors and wiring.

• Avoid driving through deep water.

• Keep the ABS system maintained.

Error code type

Sensor Issue

User experience recommendations

• Do not ignore the ABS warning light.

• Have your brakes inspected regularly.

• Drive cautiously until the issue is resolved.

Warranty information

Wheel speed sensors may be covered under the vehicle's powertrain or emissions warranty.

Historical data

C0023 is a common code that has been associated with wheel speed sensor issues since the introduction of ABS systems.

Urgency level

Moderate – While the vehicle can still be driven, braking performance may be compromised.

Legal and safety notice

Driving with a malfunctioning ABS can be dangerous and may lead to accidents.

Testing conditions

• Drive the vehicle at low speeds.

• Perform a braking test in a safe environment.

Component location

The wheel speed sensor is located near the brake rotor of each wheel.

FAQs

Q: Can I drive with a C0023 code?
A: Yes, but it's not recommended as your braking performance may be compromised.

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

Last updated: Oct 6, 2025 • Source: internal database
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