• Check Engine Light is on
• Vehicle may not start
• Malfunctioning electronic systems
• Faulty control module
• Damaged or corroded wiring
• Loose or poor connections in the CAN bus
CAN: Controller Area Network, a robust vehicle bus standard designed to allow microcontrollers and devices to communicate with each other.
DTC: Diagnostic Trouble Code, a code stored by the vehicle's onboard computer to indicate a malfunction.
• U0073
• U0074
Your car's computer is having trouble talking to some of its parts, like how a phone might have trouble connecting to the internet.
The code U0072 indicates a communication problem between the car's control modules.
U0072 is a diagnostic trouble code (DTC) for 'Control Module Communication Bus 'A' Off.' This means that there is a loss of communication with the CAN (Controller Area Network) bus 'A,' which is essential for the modules to exchange information.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Check for any other related codes that might provide more context.
• Repair or replace damaged wiring or connectors.
• Replace the faulty control module if necessary.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $500
Moderate
• Ford Focus
• Chevrolet Malibu
• Toyota Camry
• Regularly inspect and maintain vehicle wiring.
• Ensure all electrical connections are secure.
• Avoid exposure of electronic components to moisture.
Communication Error
• Have the vehicle inspected by a professional if you are unsure.
• Do not ignore the issue as it may lead to more severe problems.
Check with your vehicle manufacturer for specific warranty coverage related to electronic components.
U0072 has been a common code in vehicles with CAN bus systems, especially as electronic systems have become more complex.
Moderate – It is important to address this issue to prevent further complications.
Driving with unresolved communication issues may lead to safety risks. Consult a professional mechanic for repairs.
• Vehicle must be in a safe, stable environment.
• Ensure all electronic systems are powered on during testing.
The CAN bus wiring and connectors are usually located throughout the vehicle, connecting various control modules.
Q: Can I drive my car with a U0072 code?
A: It's not recommended to drive for extended periods with this code, as it may affect vehicle performance and safety.
Q: Will clearing the code fix the problem?
A: Clearing the code might temporarily remove the warning, but it won't fix the underlying issue.
