• Check engine light is on
• Vehicle may not start
• Loss of certain vehicle functions
• Faulty control module
• Damaged or corroded wiring/connectors
• Faulty CAN bus system
CAN Bus: A vehicle bus standard designed to allow microcontrollers and devices to communicate with each other without a host computer.
OBD-II: On-Board Diagnostics II, a standardized system for self-diagnostics and reporting in vehicles.
• U0100
• U0121
This code means that one of the car's computers isn't talking to another computer like it should. It's like when your phone can't connect to the internet.
The U0655 code indicates a loss of communication with a specific module in the vehicle.
U0655 is a diagnostic trouble code that indicates a communication error between the vehicle's control modules. This can be due to a failure in the Controller Area Network (CAN) bus system, which is responsible for inter-module communication.
• Use an OBD-II scanner to confirm the code
• Inspect wiring and connectors for damage
• Check for other related codes that may indicate a specific module failure
• Repair or replace damaged wiring/connectors
• Replace faulty control module
• Reset the vehicle's computer system
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $1000 depending on the specific issue
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance checks
• Ensure wiring is not exposed to moisture
• Avoid aftermarket modifications that can affect the CAN bus
Communication Error
• Consult a professional mechanic if unsure
• Avoid driving the vehicle if critical systems are affected
Check with your vehicle manufacturer for specific warranty coverage on electronic components.
U0655 has been a common issue in vehicles with complex electronic systems, especially as cars have become more reliant on inter-module communication.
Moderate – It is important to address this issue to prevent further complications.
Driving with a communication error can lead to unsafe driving conditions. It is recommended to address the issue promptly.
• Vehicle in ignition on position
• Engine running
The affected module is typically located in the vehicle's dashboard or engine compartment.
Q: What does the U0655 code mean?
A: It means there is a communication problem between the car's computers.
Q: Can I drive with a U0655 code?
A: It's best to get it checked out, as it may affect important vehicle functions.
