• Check Engine Light is on
• Malfunctioning vehicle systems
• Intermittent electrical issues
• Faulty or damaged wiring
• Defective control module
• Poor network connection
CAN bus: Controller Area Network bus, a vehicle communication network.
OBD-II: On-Board Diagnostics, a standardized system for vehicle diagnostics.
• U0100
• U0101
Your car uses a special network to let different parts talk to each other. This code means there's a problem with that network, like when your computer can't connect to the internet.
U0073 indicates a communication issue on the CAN bus, which is the network that connects different control modules in the vehicle.
The U0073 code is set when there is a communication failure on the Controller Area Network (CAN) bus. This network allows microcontrollers and devices to communicate with each other without a host computer. The code suggests that one or more modules are not able to communicate over the network.
• Inspect the wiring and connectors for damage or corrosion.
• Check for other codes that might indicate a specific module failure.
• Use a scan tool to check the network communication status.
• Repair or replace damaged wiring.
• Replace the faulty control module.
• Ensure all connectors are secure and free of corrosion.
• OBD-II scan tool
• Multimeter
• Wiring diagram
$100 - $500
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect wiring for damage.
• Keep connectors clean and dry.
• Avoid aftermarket modifications that may interfere with the CAN bus.
Communication Error
• Avoid driving the vehicle until the issue is resolved.
• Consult a professional mechanic for diagnosis and repair.
Check with your vehicle manufacturer for warranty coverage on electrical components.
U0073 has been a common issue as vehicles have become more reliant on electronic communication networks.
Moderate – It may affect vehicle performance and safety systems.
Driving with this code may affect vehicle safety features. It is recommended to address the issue promptly.
• Vehicle ignition on, engine off
• All electrical systems active
The CAN bus network runs throughout the vehicle, connecting various control modules located in different areas such as the engine bay, dashboard, and trunk.
Q: Can I drive my car with a U0073 code?
A: It's not recommended as it may affect critical vehicle systems.
Q: How do I reset a U0073 code?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
