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Code U0479

Symptoms

• Warning light on dashboard

• Erratic vehicle behavior

• Loss of certain vehicle functions

Common Causes

• Faulty control module

• Network communication issues

• Wiring problems

Glossary

OBD-II: On-Board Diagnostics, a system that monitors vehicle performance.

Module: An electronic control unit in the vehicle that manages specific functions.

Related Codes

• U0100

• U0140

Laymans terms

This code means that the car's computer is having trouble understanding a message from one of the car's parts. It's like when you get a text message full of gibberish and can't figure out what it means.

Explanation

U0479 indicates a communication error between modules in the vehicle, specifically an invalid data received from a certain control module.

Technical description

The U0479 code is set when the vehicle's control module receives data from another module that is incorrect or not understandable. This can happen due to network issues or faulty modules.

Diagnosis steps

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

• Check the wiring and connections between modules.

• Test the suspected faulty module.

Repair procedures

• Repair or replace faulty wiring.

• Replace the faulty control module.

• Update the software in the control module.

Tools required

• OBD-II scanner

• Multimeter

• Diagnostic software

Estimated repair cost

$150 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regular vehicle maintenance

• Check and secure all electrical connections

• Update vehicle software as needed

Error code type

Communication Error

User experience recommendations

• Ensure all vehicle software is up to date.

• Have a professional inspect the vehicle if the problem persists.

Warranty information

Warranty coverage depends on the vehicle and its warranty terms. Typically, electronic components might be covered under a manufacturer's warranty.

Historical data

U0479 has been a common code in vehicles with complex electronic systems, reflecting the increasing reliance on inter-module communication.

Urgency level

Moderate – It should be addressed soon to avoid potential vehicle performance issues.

Legal and safety notice

Ignoring this code could lead to safety issues or further vehicle damage. Always ensure your vehicle is safe to drive.

Testing conditions

• Vehicle must be running

• All electrical systems should be active

Component location

The affected modules are usually located under the dashboard or in the engine compartment.

FAQs

Q: Can I drive my car with code U0479?
A: It's possible to drive, but it's not recommended as it may lead to further issues.

Q: How do I clear the U0479 code?
A: You can clear the code with an OBD-II scanner, but it's important to fix the underlying issue first.

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