• Warning light on dashboard
• Intermittent loss of function in certain systems
• Unusual vehicle behavior
• Faulty wiring or connectors
• Malfunctioning control module
• Network communication failure
OBD-II: On-Board Diagnostics, a standardized system for vehicle diagnostics.
Control Module: A computer within the vehicle that manages specific functions.
• U0100
• U0121
This code means that there is a problem with the car's computer talking to another part of the car. It's like when two friends can't hear each other on a phone call.
This code indicates a communication error between the vehicle's control modules.
U3543 is a network communication code that signifies a loss of communication between a specific control module and the rest of the vehicle's network. This can affect the vehicle's performance and functionality.
• Check for other stored codes and freeze frame data.
• Inspect wiring and connectors related to the control modules.
• Test the affected control module for proper operation.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the faulty control module.
• Clear the codes and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Wiring diagram
$150 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain vehicle wiring.
• Keep software and firmware of vehicle systems updated.
• Avoid modifications that could interfere with vehicle communication systems.
Network Communication Issue
• Avoid driving the vehicle until the issue is diagnosed.
• Consult with a professional mechanic for accurate diagnosis.
• Keep a record of any unusual symptoms or behaviors.
Check with the vehicle manufacturer for warranty coverage on control modules.
U3543 has been reported in vehicles with complex electronic systems, often related to network communication issues.
Moderate – It is important to address this issue to prevent further complications.
Ignoring this code can lead to safety risks due to malfunctioning vehicle systems.
• Vehicle must be in a safe and stable condition.
• Ensure all vehicle systems are powered on during testing.
The affected control module is usually located within the vehicle's dashboard or engine compartment.
Q: Can I drive with a U3543 code?
A: It's not recommended to drive with this code as it may affect vehicle performance and safety.
Q: How do I clear a U3543 code?
A: After repairs, use an OBD-II scanner to clear the code and verify the issue is resolved.
