• Check Engine Light is on
• Various warning lights on the dashboard
• Vehicle may not start or run properly
• Faulty control module
• Damaged wiring or connectors
• Network communication error
CAN: Controller Area Network, a vehicle bus standard designed to allow microcontrollers and devices to communicate with each other.
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics and reporting in vehicles.
• U0100
• U0121
This code means that a part of your car's computer system isn't talking to another part like it should. It's like when two friends aren't speaking to each other, and it causes problems.
U0662 indicates a communication error between the vehicle's control modules.
The U0662 code is set when the Controller Area Network (CAN) bus communication between the control modules fails. This can be due to a loss of communication with a specific module or a malfunction within the network itself.
• Use an OBD-II scanner to verify the code.
• Inspect wiring and connectors for damage.
• Test the control modules for proper operation.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the faulty control module.
• Clear the code and test drive the vehicle.
• OBD-II scanner
• Multimeter
• Wire repair tools
$150 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect wiring for damage.
• Ensure software updates are performed.
• Avoid aftermarket devices that could interfere with the CAN bus.
Network Communication Issue
• Have a professional diagnose the issue.
• Avoid driving the vehicle if it exhibits severe symptoms.
• Keep up with regular maintenance to prevent such issues.
Check if your vehicle's warranty covers electronic control module repairs.
U0662 has been a common issue in vehicles with advanced electronic systems, especially as cars have become more reliant on computer networks.
Moderate – It should be addressed soon to avoid further complications.
Ignoring this code may lead to safety issues or vehicle malfunction.
• Vehicle ignition in the ON position.
• Ensure all modules are powered and connected.
The control modules are usually located throughout the vehicle, often behind the dashboard or near the engine compartment.
Q: Can I drive with a U0662 code?
A: It's not recommended as it may lead to further issues or safety concerns.
Q: How do I clear a U0662 code?
A: After repairs, use an OBD-II scanner to clear the code and verify the fix.
