P2523 Fault Code

A/C Request B Circuit Low

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

The P2523 fault code relates to an issue in the air conditioning (A/C) system of a vehicle, specifically indicating that the A/C request signal circuit is experiencing a low voltage condition. This can impact the performance of the A/C system and may cause it to not operate as intended.

What are the symptoms of the P2523 code?

Drivers may notice various symptoms when the P2523 code is present, such as:

• The air conditioning does not turn on even with the A/C switch activated.
• Intermittent operation of the A/C system.
• Unusual noises from the A/C system when it is attempted to be engaged.
• Inconsistent cabin temperature control during operation.

What causes the P2523 code?

Several factors could contribute to a P2523 code, including:

• Damaged or corroded wiring in the A/C request circuit.
• Faulty A/C control module or HVAC control unit.
• Malfunctioning temperature sensors that fail to signal the need to turn on the A/C.
• Issues with the A/C compressor relay or associated connectors.

How to fix P2523?

To address the P2523 code, the following steps should be taken:

• Inspect the A/C request circuit for any signs of damage, corrosion, or loose connections.
• Test the A/C control module for proper functionality and replace it if necessary.
• Check the operation of temperature sensors and replace any faulty components.
• Verify the integrity of the compressor relay and its connections.