• Warning lights on the dashboard
• Non-functional electronic components
• Intermittent electrical issues
• Faulty BCM
• Open or shorted CAN communication lines
• Faulty wiring or connectors
BCM: Body Control Module
CAN: Controller Area Network
• U0100
• U0121
This means your car's computer can't talk to another part of the car, like when your phone can't connect to Wi-Fi.
The U0140 code indicates a loss of communication with the Body Control Module (BCM).
U0140 is a diagnostic trouble code that indicates the vehicle's control modules are unable to communicate with the Body Control Module (BCM) over the Controller Area Network (CAN) bus.
• Check for other related trouble codes.
• Inspect the wiring and connectors to the BCM.
• Test the CAN communication lines for continuity.
• Repair or replace damaged wiring or connectors.
• Replace the BCM if it is found to be faulty.
• Ensure all connections are secure and free of corrosion.
• OBD-II scanner
• Multimeter
• Wiring diagram
$150 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain vehicle wiring.
• Avoid moisture exposure to electronic components.
• Perform regular diagnostic checks.
Communication Error
• Have a professional diagnose the issue to avoid further damage.
• Do not ignore warning lights on the dashboard.
• Regular maintenance can prevent communication issues.
Check if your vehicle's warranty covers electronic module repairs.
U0140 has been a common code in vehicles with complex electronic systems since the early 2000s.
Moderate – It should be addressed soon to avoid potential safety issues.
Ignoring communication errors can lead to malfunctioning safety features.
• Vehicle is on and running.
• All electrical systems are powered.
The BCM is usually located under the dashboard or near the fuse box.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to malfunctioning electronic systems and potential safety issues.
Q: Can I drive with a U0140 code?
A: While the vehicle may still be drivable, it's best to have it checked to avoid further issues.
