• Warning light on the dashboard
• Intermittent functionality of certain vehicle systems
• Unusual behavior of electronic components
• Faulty control module
• Damaged wiring or connectors
• Network communication issues
Control Module: A computer in the vehicle that manages specific functions.
Communication Network: The system that allows different vehicle modules to exchange information.
• U0100
• U0121
Your car's computer is having trouble talking to one of its parts, like how a walkie-talkie might not work if it's too far away.
The vehicle's control module is not receiving the correct data from another module, causing a communication error.
U0477 is a communication error code indicating that the data sent from one control module to another is invalid or not recognized. This can occur due to network issues or a fault in one of the modules.
• Check for other related codes
• Inspect wiring and connectors for damage
• Test the communication network for faults
• Repair or replace damaged wiring
• Replace faulty control module
• Reprogram or update software in the affected module
• OBD-II scanner
• Multimeter
• Diagnostic software
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance checks
• Ensure software updates are applied
• Inspect wiring for wear and tear
Communication Error
• Avoid ignoring warning lights
• Schedule regular maintenance
• Consult a professional if unsure
Check vehicle warranty for coverage on electronic and communication components.
U0477 is a relatively uncommon code, often associated with newer vehicles with complex electronic systems.
Moderate – Addressing this issue can prevent further communication problems.
Ignoring communication errors can lead to safety issues if critical systems are affected.
• Vehicle in ignition ON position
• All modules powered and active
The control module is typically located under the dashboard or in the engine compartment.
Q: Can I drive with a U0477 code?
A: It's possible, but not recommended as it may affect vehicle performance.
Q: How do I clear a U0477 code?
A: Use an OBD-II scanner to clear the code, but ensure the issue is fixed first.
