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P2522 OBD2: A/C Request "B" Circuit

P2522 OBD2: A/C Request “B” Circuit

What Does the P2522 Code Mean?

The P2522 code indicates that there is a problem with the A/C system’s request circuit. When the driver turns on the air conditioning, a signal is sent from the switch to the Powertrain Control Module (PCM), which is responsible for controlling the A/C compressor. If the compressor does not activate, the P2522 code may be triggered.

What Causes the P2522 Code?

Several factors can contribute to the P2522 code being stored, including:

  • A/C compressor failure
  • A/C compressor relay failure
  • Powertrain Control Module (PCM) failure
  • Wiring issues

What Are the Symptoms of the P2522 Code?

The primary symptom associated with the P2522 code is that the A/C may not operate as expected. This could manifest as:

  • Inability to cool the cabin effectively
  • No response from the A/C system when activated

How Serious Is the P2522 Code?

The P2522 code is classified as a moderate severity issue. While it may not pose an immediate threat to the safety or functionality of the vehicle, it is advisable to have it diagnosed in a timely manner to ensure the vehicle remains in good working order.

How to Diagnose the P2522 Code

To properly diagnose the P2522 code, a mechanic will typically follow these steps:

  • Use an OBD-II scanner to confirm the presence of the P2522 code.
  • Inspect the A/C system, including the compressor, relay, and wiring.
  • Test the A/C request switch for functionality.
  • Check the PCM for any faults or updates.

Common Repairs for the P2522 Code

Repairs for the P2522 code may include:

  • Replacing a faulty A/C compressor
  • Replacing a defective A/C compressor relay
  • Repairing or replacing damaged wiring
  • Reprogramming or replacing the PCM if necessary

How Much Does It Cost to Fix the P2522 Code?

The cost of repairing the P2522 code can vary widely depending on the specific issue. On average, you might expect to pay anywhere from $100 to $1,500. Simple repairs, like replacing a relay or fixing wiring, will be on the lower end, while replacing the compressor or PCM can be more expensive.

Can I Fix the P2522 Code Myself?

While some DIY enthusiasts may feel comfortable diagnosing and repairing issues related to the P2522 code, it is often best to consult with a certified mechanic. They have the necessary tools and expertise to accurately diagnose and fix the problem, ensuring that your A/C system operates as intended.

About JC Landry

JC is the Senior Editor at eManualOnline.com, GarageSpot.com, and Drive-My.com, as well as the Webmaster of TheMechanicDoctor.com, only to name a few. He's been a certified Master Mechanic for 15 years, working for various car dealers and specialized repair shops before turning towards blogging about cars and EVs in the hope of helping the next generation of automotive technicians. He also loves cats, Johnny Cash and Subarus.

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