• Power locks not working
• Windows not operating
• No response from the door controls
• Faulty door module
• Wiring issues such as damaged or corroded wires
• Faulty CAN bus connection
CAN bus: A robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other in applications without a host computer.
Door Module: An electronic control unit responsible for managing door-related functions such as locks and windows.
• U0201
• U0203
This code means that the car's computer is having trouble talking to the door module. It's like when your phone can't connect to the Wi-Fi.
The vehicle's main computer has lost communication with the door module.
U0202 indicates a lost communication with the Door Module 'A'. The vehicle's control module is unable to communicate with the door module over the Controller Area Network (CAN) bus.
• Check for other communication codes
• Inspect wiring and connections to the door module
• Test the door module for proper operation
• Repair or replace damaged wiring
• Reconnect or replace faulty connectors
• Replace the door module if necessary
• OBD-II scanner
• Multimeter
• Wire repair tools
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect wiring for damage
• Avoid moisture exposure to electronic components
• Ensure connectors are securely attached
Communication Error
• Check if other electronic features are working
• Consult a professional if unsure about repairs
Check vehicle warranty for coverage on electronic components.
This code has been more prevalent as vehicles become more reliant on electronic communication systems.
Moderate – While not immediately critical, it can affect vehicle convenience features.
Ensure all repairs are conducted by a qualified technician to avoid safety hazards.
• Vehicle ignition in the ON position
• Attempt to operate door functions
The door module is typically located inside the door panel.
Q: Can I drive with code U0202?
A: Yes, but some door functions may not work properly.
Q: Will this code affect my car's performance?
A: No, it primarily affects door-related features.
