• Warning lights on the dashboard
• Erratic vehicle behavior
• Failure of certain vehicle functions
• Faulty control module
• Damaged wiring or connectors
• Network communication error
OBD-II: On-Board Diagnostics, a standardized system in vehicles for self-diagnostics and reporting.
Module: A component in the vehicle's electronic system that controls specific functions.
• U0100
• U0140
This code means that the car's computer is having trouble talking to one of the parts that helps it run smoothly. It's like when your phone can't connect to the internet.
This code indicates a communication error between the vehicle's control modules.
U3520 is a network communication code indicating a loss of communication with a specific module in the vehicle's control system network. This can affect the vehicle's performance and functionality.
• Check for other codes that might indicate a specific module failure.
• Inspect wiring and connectors for damage or corrosion.
• Test the communication network with a diagnostic tool.
• Repair or replace damaged wiring or connectors.
• Replace the faulty control module.
• Reprogram or reset the vehicle's computer system.
• OBD-II scanner
• Multimeter
• Wiring diagram
$150 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly check and maintain vehicle wiring.
• Ensure connectors are secure and free of corrosion.
• Perform routine diagnostic checks.
Network Communication Issue
• Avoid driving the vehicle until the issue is diagnosed.
• Consult a professional mechanic for accurate diagnosis and repair.
Check your vehicle's warranty for coverage on electronic control modules.
U3520 has been a common issue in vehicles with complex electronic systems, typically related to network communication failures.
Moderate – While the vehicle may still operate, certain functions may be impaired, and it should be addressed soon.
Ignoring this code may lead to further vehicle malfunctions and could compromise safety.
• Vehicle parked and engine off
• Diagnostic tool connected to OBD-II port
The affected module is typically located within the vehicle's electronic control system, often under the dashboard or in the engine bay.
Q: Can I drive with code U3520?
A: It's best to avoid driving until the issue is fixed, as some vehicle functions may not work properly.
Q: How do I clear code U3520?
A: After repairs, use an OBD-II scanner to clear the code from the vehicle's computer.
