The C0561-71 code is a diagnostic trouble code (DTC) commonly encountered in various General Motors (GM) vehicles, including Chevrolet and GMC models. This code indicates a problem with the Electronic Brake Control Module (EBCM), specifically relating to the traction control system.

What is C0561-71?

The C0561-71 code signifies that the EBCM has detected an issue where the system is disabled due to “invalid serial data received.” This typically means that the EBCM is not receiving accurate information from other vehicle modules, which can lead to the deactivation of crucial systems like anti-lock brakes (ABS) and traction control.

Symptoms of C0561-71

When this code appears, drivers may experience several symptoms:

  • Dashboard Warning Lights: The “Service Stabilitrak” and ABS warning lights may illuminate.
  • Unusual Brake Behavior: Drivers might notice instability during braking or difficulty controlling the vehicle.
  • Ride Instability: The vehicle may feel less stable during turns or when driving on uneven surfaces.

Common Causes of C0561-71

Several factors can trigger the C0561-71 code:

  • Faulty Wheel Speed Sensors: These sensors provide critical data to the EBCM. If they malfunction, it can lead to inaccurate readings.
  • Wiring Issues: Damaged or corroded wiring harnesses can disrupt communication between modules.
  • EBCM Malfunction: The EBCM itself may be faulty, requiring replacement or reprogramming.

Diagnosis and Repair Steps

To resolve the C0561-71 code, follow these steps:

1. Scan for Additional Codes: Use a diagnostic scanner to check for any related codes that may provide more context about the issue.

2. Inspect Wheel Speed Sensors: Check all wheel speed sensors for proper operation and ensure they are clean and securely connected.

3. Examine Wiring and Connectors: Look for any signs of damage or corrosion in the wiring harnesses connected to the EBCM and wheel speed sensors.

4. Test the EBCM: If no issues are found with sensors or wiring, consider testing or replacing the EBCM.

5. Clear Codes and Test Drive: After repairs, clear the codes and take the vehicle for a test drive to see if the issue reoccurs.

Preventive Measures

To minimize future occurrences of the C0561-71 code:

  • Regularly maintain your vehicle’s braking system.
  • Ensure all electrical connections are clean and secure.
  • Address any warning lights promptly to prevent further complications.

FAQs About C0561-71

  • What does C0561-71 mean?
    This code indicates a traction control system issue due to invalid data received by the EBCM.
  • Can I drive my vehicle with this code?
    While it may be possible, it is not recommended as it affects braking performance and stability.
  • How much does it cost to fix a C0561-71 issue?
    Repair costs can vary widely from $20 for minor fixes to $600 or more for component replacements.