• Check engine light is on
• Vehicle may not start
• Various electrical components may not work
• Faulty control module
• Damaged wiring or connectors
• CAN bus network issues
CAN bus: A robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other.
DTC: Diagnostic Trouble Code, a code identifying a problem in the vehicle.
• U0100
• U0121
Your car's computer is having trouble talking to one of the parts. It's like when your phone can't connect to the internet.
This code indicates a communication error between the vehicle's control modules.
U0673 is a generic communication error code that occurs when the Controller Area Network (CAN) bus has a malfunction. It means that there is a loss of communication with a specific control module, which could be due to wiring issues, a faulty module, or network problems.
• Check for other diagnostic trouble codes (DTCs) that may indicate a specific module failure.
• Inspect wiring and connectors for damage or corrosion.
• Test the CAN bus network for continuity and resistance.
• Replace or repair damaged wiring or connectors.
• Replace the faulty control module.
• Reprogram or update the software of the control module if necessary.
• OBD-II scanner
• Multimeter
• CAN bus diagnostic tool
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain vehicle wiring and connectors.
• Ensure software updates are applied to control modules.
• Avoid aftermarket modifications that may interfere with the CAN bus.
Communication Error
• Have your vehicle inspected by a professional if this code appears.
• Avoid driving the vehicle if it exhibits severe symptoms.
Check with your vehicle manufacturer for warranty coverage on control modules.
U0673 is a common code associated with CAN bus communication issues, often seen in vehicles with complex electronic systems.
Moderate – While the vehicle may still operate, it could lead to further issues if not addressed.
Ignoring this code may lead to vehicle safety concerns and potential legal issues if the vehicle fails to meet emission standards.
• Vehicle ignition on
• Battery fully charged
The control modules are typically located throughout the vehicle, including under the dashboard and in the engine compartment.
Q: Can I drive my car with code U0673?
A: It's possible to drive, but it's not recommended as it could lead to further issues.
Q: Will resetting the code fix the problem?
A: Resetting the code may temporarily clear it, but the underlying issue needs to be addressed to prevent recurrence.
