The C0561-71 code is a diagnostic trouble code (DTC) that indicates a problem within the Electronic Stability Control (ESC) system of General Motors (GM) vehicles. This code is crucial for vehicle safety, as it relates to the operation of systems designed to maintain vehicle stability and traction.

What is the C0561-71 Code?

The C0561-71 code specifically signifies that the Electronic Brake Control Module (EBCM) has received invalid serial data from another control module. This can lead to the deactivation of critical systems such as the Anti-lock Braking System (ABS), traction control, and electronic stability control. The presence of this code often triggers warning lights on the dashboard, including “Service Stabilitrak” and “ABS” indicators.

Symptoms of C0561-71

When the C0561-71 code is triggered, drivers may notice several symptoms:

  • Unusual Brake Behavior: Drivers might experience unexpected braking responses, such as shaking or instability when applying brakes.
  • Ride Instability: The vehicle may feel unstable during turns or on uneven surfaces, indicating a failure in maintaining traction.
  • Dashboard Warning Lights: Warning lights for ABS and traction control may illuminate, signaling that these systems are inactive.

Causes of C0561-71

Several factors can trigger the C0561-71 code:

  • Faulty Wheel Speed Sensors: These sensors are vital for detecting wheel speed and ensuring proper ESC function. Damage or dirt on these sensors can lead to incorrect readings.
  • Improper Brake Pressure Adjustments: If brake pressure settings are not aligned with manufacturer specifications, it can cause system malfunctions.
  • Malfunctioning Control Modules: Issues within the EBCM or other related control modules can disrupt communication and data transfer between systems.

Troubleshooting and Solutions

To address the C0561-71 code, consider the following troubleshooting steps:

  • Inspect Wheel Speed Sensors: Check for damage or dirt accumulation on these sensors. Cleaning or replacing them can often resolve issues.
  • Assess Brake Pressure Settings: Verify that brake pressure aligns with manufacturer specifications to ensure optimal performance.
  • Check Control Modules: Inspect for any malfunctions in the EBCM or other related modules. Sometimes, reprogramming or updating software may be necessary.

Professional Assistance

If DIY troubleshooting does not resolve the issue, seeking professional help is advisable. A qualified technician can perform comprehensive diagnostics and testing to identify underlying problems accurately.

FAQs About C0561-71

FAQs About C0561

  • What does C0561-71 mean?
    This code indicates that the EBCM has received invalid serial data from another module, leading to system deactivation.
  • What are common symptoms?
    Symptoms include unusual brake behavior, ride instability, and illuminated dashboard warning lights.
  • How can I fix this issue?
    Inspect wheel speed sensors, assess brake pressure settings, and check control modules for faults.

Understanding and addressing the C0561-71 code is essential for maintaining vehicle safety and performance. Regular inspections and maintenance can help prevent this issue from arising.