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 » C0022

Code C0022

Symptoms

• ABS warning light on the dashboard

• Reduced braking performance

• Unusual noises during braking

Common Causes

• Faulty left front wheel speed sensor

• Damaged wiring or connectors

• Malfunctioning ABS control module

Glossary

ABS: Anti-lock Braking System

OBD-II: On-Board Diagnostics, Second Generation

Related Codes

• C0021

• C0023

Laymans terms

This code means there's a problem with the car's brakes. It's like when your bike brakes don't work well and you can't stop quickly.

Explanation

C0022 is a code indicating an issue with the Anti-lock Braking System (ABS).

Technical description

The C0022 code is triggered when the ABS module detects a malfunction in the left front wheel speed sensor circuit. This can affect the vehicle's ability to maintain traction and stability during braking.

Diagnosis steps

• Check the ABS warning light and retrieve the code using an OBD-II scanner.

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

• Test the ABS module for proper operation.

Repair procedures

• Replace the faulty left front wheel speed sensor.

• Repair or replace damaged wiring or connectors.

• Replace the ABS control module if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Socket set

Estimated repair cost

$150 - $400

Difficulty level

Moderate

Commonly affected vehicles

• Ford Focus

• Chevrolet Malibu

• Toyota Camry

Preventive measures

• Regularly inspect brake components.

• Ensure proper maintenance of the ABS system.

• Avoid harsh braking to reduce wear on sensors.

Error code type

Braking System Issue

User experience recommendations

• Drive cautiously and avoid sudden stops.

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

Warranty information

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

Historical data

C0022 has been a common code for vehicles with ABS systems, often related to sensor failures.

Urgency level

High – This affects braking performance and should be addressed immediately.

Legal and safety notice

Driving with a malfunctioning ABS can be dangerous and may violate safety regulations.

Testing conditions

• Vehicle on a level surface

• Ignition in the 'on' position

Component location

The left front wheel speed sensor is located near the wheel hub assembly on the driver's side.

FAQs

Q: Can I drive with the C0022 code?
A: It's not recommended as it affects braking performance. Get it checked soon.

Q: What does the ABS warning light mean?
A: It indicates a problem with the anti-lock braking system, which helps prevent wheel lock-up during braking.

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

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