The C0561-71 diagnostic trouble code (DTC) is a common issue in General Motors (GM) vehicles, particularly affecting models like Chevrolet and GMC. This code indicates a problem with the vehicle's Electronic Brake Control Module (EBCM), specifically relating to invalid serial data received from other modules. Understanding the symptoms, causes, and potential solutions is crucial for vehicle owners experiencing this issue.

Symptoms of C0561-71

When the C0561-71 code is triggered, drivers may notice several symptoms that can affect vehicle performance:

  • Illuminated Warning Lights: The ABS and traction control warning lights may illuminate on the dashboard.

  • Reduced Engine Power: The vehicle may experience a reduction in engine power, making it feel sluggish or unresponsive.

  • Disabled Traction Control: The traction control system may be disabled, which can lead to decreased stability during slippery conditions.

  • Unusual Brake Behavior: Drivers might notice inconsistent braking performance or feel that the brakes are not responding as expected.

Causes of C0561-71

Several factors can contribute to the activation of the C0561-71 code:

  • Invalid Serial Data: The EBCM receives faulty data from other modules (like the Body Control Module or Engine Control Module), leading to system deactivation.

  • Faulty Wheel Speed Sensors: Malfunctioning wheel speed sensors can provide incorrect data to the EBCM, triggering this code.

  • Electrical Issues: Problems such as poor connections, damaged wiring, or low voltage can affect data transmission between modules.

  • Software Issues: In some cases, outdated or corrupted software in the EBCM may lead to communication errors.

Solutions for C0561-71

Addressing the C0561-71 code effectively requires a systematic approach:

DIY Troubleshooting Steps

1. Inspect Wheel Speed Sensors: Check for any visible damage or dirt on the wheel speed sensors. Clean or replace them if necessary.

2. Check Electrical Connections: Ensure that all electrical connections related to the EBCM and other control modules are secure and free from corrosion.

3. Scan for Additional Codes: Use an OBD-II scanner to check for any additional trouble codes that could provide more context about the issue.

4. Reset the EBCM: Sometimes, resetting the EBCM can clear temporary faults. This should be done cautiously and ideally by a professional.

When to Seek Professional Help

If DIY troubleshooting does not resolve the issue, consider seeking professional assistance:

  • Comprehensive Diagnostic Check: A qualified mechanic can perform a detailed diagnostic scan using advanced tools that may reveal hidden issues.

  • Component Testing: Professionals can test various components within the braking system to identify specific malfunctions.

  • Software Updates: If software issues are suspected, a dealership or certified technician can update or reprogram the EBCM as needed.

Conclusion

The C0561-71 DTC is indicative of serious issues within your vehicle's braking system that require immediate attention. By understanding its symptoms and causes, vehicle owners can take appropriate steps to troubleshoot or seek professional help. Addressing this code promptly not only ensures safer driving conditions but also helps maintain overall vehicle performance.

FAQs About C0561-71

    • What does C0561-71 mean?
      This code indicates that the Electronic Brake Control Module has received invalid serial data from another module.
    • Can I drive my car with this code?
      While it may be possible to drive with this code present, it is not recommended as it affects braking performance and vehicle stability.
    • How much does it cost to fix?
      Repair costs can vary widely depending on the underlying issue but typically range from $120 to $600 when involving professional diagnostics and repairs.