AutoCodes – GMC – P2519 GMC

P2519 GMC Code - A/C Request 'A' Circuit

Quick Answer

The Powertrain Control Module (PCM) monitors the refrigerant pressure through the Air Condition (A/C) Pressure Sensor. Common causes include Low refrigerant, Too much refrigerant, Faulty Low Side Pressure Sensor. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P2519 GMC indicates A/C Request 'A' Circuit.
Common causes: Common causes include Low refrigerant, Too much refrigerant, Faulty Low Side Pressure Sensor.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 1,307

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jan 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2519 GMC Description

The Powertrain Control Module (PCM) monitors the refrigerant pressure through the Air Condition (A/C) Pressure Sensor. The PCM supplies a 5V reference and a low reference to the sensor. Changes in the A/C refrigerant pressure causes the sensor signal to the PCM to vary. When the pressure is high, the signal is high. When the pressure is low, the signal is low. The PCM sets the OBII code when the signal from the sensor is out of factory specifications.

OBDII Code P2519 GMC - A/C Request 'A' Circuit - AutoCodes.com — P2519 GMC Code - A/C Request 'A' Circuit

What does this mean?

What are the Possible Causes of the DTC P2519 GMC?

Low refrigerant
Too much refrigerant
Faulty Low Side Pressure Sensor
Low Side Pressure Sensor harness is open or shorted
Low Side Pressure Sensor circuit poor electrical connection

How to Fix the DTC P2519 GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2519 GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2519 GMC Code

1. What are the common symptoms of OBDII code P2519 GMC (A/C Request 'A' Circuit)?

The common symptoms include issues with the air conditioning system not functioning properly, lack of cool air blowing from the vents, and potential compressor failures.

2. What are the possible causes of OBDII code P2519 GMC (A/C Request 'A' Circuit)?

Possible causes include a faulty A/C compressor, damaged wiring or connectors in the A/C circuit, low refrigerant levels, or a malfunctioning A/C pressure sensor.

3. How can I diagnose OBDII code P2519 GMC (A/C Request 'A' Circuit)?

You can diagnose this code by using an OBDII scanner to read the code, checking the A/C compressor for proper operation, inspecting the wiring and connectors for any visible damage, and testing the A/C pressure sensor.

4. Can I continue to drive my vehicle with OBDII code P2519 GMC (A/C Request 'A' Circuit)?

It is not recommended to drive your vehicle with this code as it can lead to further damage to the A/C system. It is best to address the issue promptly to avoid more costly repairs.

5. How can I repair OBDII code P2519 GMC (A/C Request 'A' Circuit)?

Repair options include replacing the faulty A/C compressor, repairing any damaged wiring or connectors, recharging the refrigerant levels, and replacing the A/C pressure sensor if necessary.

6. Will resetting the OBDII code P2519 GMC (A/C Request 'A' Circuit) make it go away permanently?

Resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause of the problem to prevent recurrence.

7. Can a DIY enthusiast fix OBDII code P2519 GMC (A/C Request 'A' Circuit) at home?

While some simple repairs like checking and cleaning connectors may be possible for a DIY enthusiast, diagnosing and repairing complex issues with the A/C system may require professional expertise and specialized tools.

8. How much does it cost to fix OBDII code P2519 GMC (A/C Request 'A' Circuit)?

The cost of fixing this code can vary depending on the specific issue causing it. Repairs such as replacing the A/C compressor or repairing wiring may range from a few hundred to a few thousand dollars, including parts and labor.

9. Can OBDII code P2519 GMC (A/C Request 'A' Circuit) affect the overall performance of the vehicle?

While this code specifically relates to the A/C system, unresolved issues can potentially impact the vehicle's overall performance by causing strain on the engine and affecting fuel efficiency. It is best to address the problem promptly to prevent any further issues.

10. Is it possible for OBDII code P2519 GMC (A/C Request 'A' Circuit) to cause other warning lights to come on?

Yes, unresolved issues with the A/C system can sometimes trigger other warning lights related to engine performance or electrical systems. It is essential to address the underlying problem to prevent additional warning lights from appearing.