P2522 Fault Code

A/C Request B Circuit

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

The P2522 fault code is associated with the A/C Request B Circuit. This code indicates that there is a problem in the circuit responsible for signaling the air conditioning (A/C) compressor to engage based on the driver's request. The A/C system often uses multiple signals to function correctly, and when the B circuit malfunctions, it can prevent proper cooling within the vehicle.

What are the symptoms of the P2522 code?

Drivers may experience several symptoms when the P2522 code is present, such as:

• Inconsistent or no A/C operation.
• The A/C compressor may not engage when the switch is activated.
• Unusual noises from the A/C system when turned on.
• An illuminated check engine light or A/C warning indicator on the dashboard.

What causes the P2522 code?

Common causes of the P2522 fault code include:

• Damaged wiring or connectors in the A/C request circuit.
• A faulty A/C control module.
• Issues with the climate control panel.
• A malfunctioning compressor relay.
• Low refrigerant levels that result in compressor engagement issues.

How to fix P2522?

To resolve the P2522 fault code, follow these steps:

• Inspect the wiring and connectors in the A/C Request B circuit for damage and repair as necessary.
• Test the A/C control module and climate control panel for functionality, replacing if defective.
• Check the compressor relay and replace it if it is faulty.
• Ensure refrigerant levels are adequate, adding more if they are low.
• Clear the fault code and test the A/C system to ensure it functions correctly.