• Check engine light on
• Malfunctioning vehicle systems
• Intermittent electrical issues
• Faulty control module
• Damaged wiring or connectors
• Network communication error
Control Module: An electronic device that manages a specific function in the vehicle.
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics and reporting.
• U0100
• U0140
This code means that one of the car's computers isn't talking to another computer like it should. It's like when your phone can't connect to Wi-Fi.
U0699 indicates a communication problem between control modules in the vehicle.
The U0699 code is set when there is a loss of communication with a specific control module, which could be due to wiring issues, a failed module, or network problems.
• Check for other codes that may indicate a specific module failure.
• Inspect wiring and connectors for damage or corrosion.
• Test the communication network for continuity and proper function.
• Repair or replace damaged wiring or connectors.
• Replace the faulty control module.
• Update or reprogram the control module software.
• OBD-II scanner
• Multimeter
• Wiring diagram
$100 - $1000 depending on the specific issue and vehicle model.
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain vehicle wiring.
• Ensure control modules are updated with the latest software.
• Avoid exposure of electronic components to moisture.
Communication Error
• Have a professional diagnose the issue to avoid unnecessary repairs.
• Do not ignore the check engine light as it may lead to further issues.
• Keep a record of all repairs and diagnostics performed.
Check with your vehicle manufacturer as some control module repairs may be covered under warranty.
Communication errors like U0699 have become more common as vehicles incorporate more electronic systems.
Moderate – While the vehicle may still operate, unresolved communication issues can lead to other system failures.
Ignoring this code may lead to safety systems not functioning properly, which could be dangerous.
• Vehicle ignition on
• All electrical systems operational
Control modules are typically located under the dashboard, in the engine bay, or near the vehicle's center console.
Q: Can I drive with a U0699 code?
A: While you may be able to drive, it's not recommended as it could lead to further issues.
Q: Is this code covered under warranty?
A: It depends on your vehicle's warranty terms. Check with your manufacturer or dealer.
