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P2519 OBD2: A/C Request "A" Circuit

P2519 OBD2: A/C Request “A” Circuit

The P2519 OBD-II code refers to an issue within the A/C Request “A” Circuit. It indicates that there is a problem related to the air conditioning system’s operation, specifically when the driver requests for the A/C to be turned on.

What Does the P2519 Code Mean?

The P2519 code is triggered when the vehicle’s engine computer (PCM) fails to receive the proper signal from the A/C request switch. This failure can prevent the A/C compressor from activating, which means that the air conditioning system may not operate as intended.

What Causes the P2519 Code?

Several factors can lead to the P2519 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 P2519 Code?

The most common symptom associated with the P2519 code is that the A/C system may not operate at all. Drivers may notice that when they attempt to turn on the A/C, there is no response, which can lead to discomfort in hot weather.

How Serious Is the P2519 Code?

The P2519 code is classified as a moderate severity issue. While it may not pose an immediate threat to the vehicle’s safety or driveability, it is advisable to have it diagnosed and repaired within a reasonable timeframe to ensure the air conditioning system functions properly.

How to Diagnose the P2519 Code

To accurately diagnose the P2519 code, a mechanic will typically follow these steps:

  1. Use an OBD-II scanner to confirm the presence of the P2519 code.
  2. Inspect the A/C request switch for any fault or damage.
  3. Check the wiring and connectors leading to the A/C compressor for any signs of wear or disconnection.
  4. Test the A/C compressor relay to ensure it is functioning correctly.
  5. Assess the Powertrain Control Module (PCM) for any faults or failures.

Common Repairs for the P2519 Code

Repairs for the P2519 code may include:

  • Replacing a faulty A/C compressor
  • Repairing or replacing the A/C compressor relay
  • Fixing wiring issues or replacing damaged connectors
  • Reprogramming or replacing the Powertrain Control Module (PCM) if necessary

How Much Does It Cost to Fix the P2519 Code?

The cost to fix the P2519 code can vary widely depending on the specific issue and the make and model of the vehicle. On average, repairs can range from $100 to $1,000. This includes diagnostic fees, parts, and labor.

Can I Fix the P2519 Code Myself?

While some DIY enthusiasts may be able to troubleshoot and fix minor issues related to the A/C system, it is recommended to consult a professional mechanic for a proper diagnosis and repair of the P2519 code. This ensures that the underlying problem is addressed effectively.

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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