• Warning lights on the dashboard
• Inoperative safety features
• Intermittent communication errors
• Faulty Active Safety Control Module
• Damaged wiring or connectors
• Faulty ECU
ECU: Engine Control Unit
OBD-II: On-Board Diagnostics II
• U0100
• U0121
Your car has a computer that talks to other parts of the car. This code means one of the parts isn't talking back like it should.
The U0642 code indicates a loss of communication with the Active Safety Control Module.
U0642 is a communication error code indicating that the vehicle's main computer (ECU) is unable to communicate with the Active Safety Control Module. This module is responsible for various safety features in the vehicle, such as lane departure warnings and automatic braking systems.
• Check for other communication-related codes.
• Inspect wiring and connectors for damage.
• Test the Active Safety Control Module for faults.
• Repair or replace damaged wiring or connectors.
• Replace the Active Safety Control Module if faulty.
• Update or reprogram the ECU if necessary.
• OBD-II scanner
• Multimeter
• Wiring diagrams
$150 - $600
Moderate
• Toyota Camry
• Honda Accord
• Ford Fusion
• Regularly inspect and maintain vehicle wiring.
• Ensure all software updates are performed.
• Avoid aftermarket modifications that may affect communication lines.
Communication Error
• Consult a professional mechanic if you are not experienced with vehicle electronics.
• Do not ignore warning lights as they may indicate critical safety features are disabled.
Check with your vehicle manufacturer; some modules may be covered under warranty.
Communication errors like U0642 have become more common as vehicles integrate more electronic control modules.
Moderate – Important safety features may be disabled.
Driving with disabled safety features can increase the risk of accidents. Address the issue promptly.
• Vehicle in a safe, stationary position.
• Ignition in the 'ON' position.
The Active Safety Control Module is typically located behind the dashboard or near the center console.
Q: Can I drive with a U0642 code?
A: It's not recommended as important safety features may be disabled.
Q: How do I clear a U0642 code?
A: Fix the underlying issue first, then use an OBD-II scanner to clear the code.
