What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

🖨️

Home » OBD2 Codes » C0561

Code C0561

Symptoms

• Stability control warning light on

• Loss of traction control

• ABS warning light on

Common Causes

• Faulty Electronic Brake Control Module (EBCM)

• Communication error between modules

• Faulty wiring or connectors

Glossary

PCM: Powertrain Control Module

EBCM: Electronic Brake Control Module

Related Codes

• C0560

• C0562

Laymans terms

This code means that the car's computer is having trouble communicating with the stability control system, which helps keep the car from skidding.

Explanation

The C0561 code indicates a problem with the communication between the vehicle's control modules, specifically affecting the stability control system.

Technical description

C0561 is a chassis code that refers to a malfunction in the communication between the Powertrain Control Module (PCM) and the Electronic Brake Control Module (EBCM). This can affect the vehicle's stability control functions.

Diagnosis steps

• Check for additional trouble codes.

• Inspect wiring and connectors for damage.

• Test the EBCM for proper function.

Repair procedures

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the EBCM if necessary.

• Clear the codes and test drive the vehicle.

Tools required

• OBD-II scanner

• Multimeter

• Diagnostic software

Estimated repair cost

$150 - $600

Difficulty level

Moderate

Commonly affected vehicles

• Chevrolet Silverado

• GMC Sierra

• Cadillac Escalade

Preventive measures

• Regular maintenance checks

• Ensure proper software updates

• Inspect wiring for wear and tear

Error code type

Communication Error

User experience recommendations

• Avoid driving in conditions that require stability control until repaired.

• Consult a professional mechanic for diagnosis.

• Do not ignore the warning lights on the dashboard.

Warranty information

Check with the manufacturer for warranty coverage on electronic control modules.

Historical data

C0561 has been a common code for vehicles with stability control systems, often related to communication issues between modules.

Urgency level

Moderate – It is recommended to address this issue soon to ensure vehicle safety and performance.

Legal and safety notice

Driving with a malfunctioning stability control system can be dangerous, especially in adverse conditions.

Testing conditions

• Vehicle stationary

• Engine running

Component location

The Electronic Brake Control Module (EBCM) is usually located near the brake master cylinder or under the hood near the firewall.

FAQs

Q: Can I drive with a C0561 code?
A: It's not recommended to drive with this code active, as it can affect the vehicle's stability and traction control systems.

Q: How do I clear a C0561 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is resolved, the code should not return.

Last updated: Feb 7, 2026 • Source: internal database

Diagnose Your Check Engine Light