P2561 Fault Code

A/C Control Module Requested MIL Illumination

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2561 fault code indicates that the A/C Control Module has requested the Malfunction Indicator Lamp (MIL) to be illuminated. This typically signifies an issue with the vehicle's air conditioning system that requires attention. The A/C Control Module is responsible for regulating the A/C system's operations, and when it detects a problem that could impact its functionality, it signals the engine control unit (ECU) to activate the MIL.

What are the symptoms of the P2561 code?

• Air conditioning not functioning properly
• Unusual noises from the A/C system when it operates
• Inability to switch the A/C on or off
• Fluctuating cabin temperatures
• MIL illuminated on the dashboard
• Refrigerant leakage

What causes the P2561 code?

• Faulty A/C Control Module
• Wiring or connection issues related to the A/C circuit
• Low refrigerant levels
• Failed A/C compressor
• Electrical short circuit
• Sensor malfunctions related to temperature or pressure

How to fix P2561?

• Begin by performing a visual inspection of the A/C system for any leaks or visible damage.
• Check the electrical connections and wiring to the A/C Control Module for signs of wear or corrosion.
• Test the A/C Control Module for proper functionality using diagnostic tools.
• Ensure that the refrigerant is at the correct level and refill if necessary.
• Replace the A/C compressor if it is found to be faulty.
• Clear the fault codes and perform a system reset, then monitor vehicle operations.