• Auxiliary heater not functioning
• Warning light on the dashboard
• Error message on vehicle display
• Faulty Auxiliary Heater Control Module
• Damaged wiring or connectors
• Network communication issues
Auxiliary Heater: A secondary heating system in a vehicle, often used in colder climates.
Control Module: An electronic device that manages specific functions in a vehicle.
• U0100
• U0140
This code means that a part of the car's computer system, like a walkie-talkie, isn't talking to the other parts like it should.
A communication error has occurred between the vehicle's control modules.
U0667 indicates a lost communication with the Auxiliary Heater Control Module. This means the data network in the vehicle is not receiving or sending information correctly to this specific module.
• Check for other related codes
• Inspect wiring and connectors for damage
• Test the Auxiliary Heater Control Module
• Repair or replace damaged wiring
• Replace faulty connectors
• Replace the Auxiliary Heater Control Module if necessary
• OBD-II Scanner
• Multimeter
• Wiring repair tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance checks
• Ensure proper installation of components
• Avoid exposure to excessive moisture
Network Communication Issue
• Consult a professional mechanic
• Avoid DIY repairs if unsure
• Regularly check for software updates
Check if the vehicle is still under warranty for electronic components.
This code has been reported in vehicles with complex network systems, especially those with auxiliary heating features.
Moderate – The vehicle can still be driven, but the auxiliary heater may not work.
Ignoring this code may lead to further electrical issues. Ensure all repairs comply with safety standards.
• Vehicle ignition in ON position
• All electrical systems operational
The Auxiliary Heater Control Module is typically located under the dashboard or near the heating system components.
Q: Can I drive my car with a U0667 code?
A: Yes, but the auxiliary heater may not work properly.
Q: Will this code affect my car's performance?
A: Not directly, but it may affect the comfort features like heating.
