AutoCodes – Generic – P2519

P2519 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 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 12,844

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

What does this mean?

What are the Possible Causes of the DTC P2519?

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?

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 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.

Need more information about the P2519 code?

Need more information on how to fix the P2519 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2519 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2519 Chevrolet — A/C Request 'A' Circuit
P2519 Dodge — A/C Request 'A' Circuit
P2519 Ford — A/C Request 'A' Circuit
P2519 GMC — A/C Request 'A' Circuit
P2519 Mercedes-Benz — A/C Request 'A' Circuit

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 Code

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

The common symptoms of P2519 include inoperative air conditioning, a non-functioning A/C compressor, and a lack of cold air coming from the vents.

2. What causes the OBDII code P2519 to trigger?

The code P2519 is usually triggered by a fault in the A/C control circuit, such as a short circuit, open circuit, or faulty A/C request signal.

3. How do I diagnose the OBDII code P2519?

Diagnosing P2519 involves checking the A/C system for any wiring issues, testing the A/C control module, and verifying the A/C request signal from the climate control unit.

4. Can a bad A/C compressor cause the OBDII code P2519 to set?

Yes, a faulty A/C compressor or related components can sometimes trigger the P2519 code due to issues with the A/C request circuit.

5. What are some repair tips for fixing OBDII code P2519?

Repair tips for P2519 may include checking and repairing any damaged wiring, replacing the A/C control module if necessary, and ensuring proper operation of the A/C compressor.

6. Is it safe to continue driving with the OBDII code P2519 present?

It is generally safe to drive with the P2519 code, but it is recommended to address the issue promptly to avoid discomfort from lack of A/C and potential damage to the A/C system.

7. Can I reset the OBDII code P2519 without fixing the underlying issue?

Resetting the code without fixing the underlying issue may temporarily turn off the check engine light, but the code is likely to return until the root cause is addressed.

8. How much does it typically cost to repair OBDII code P2519?

The cost of repairing P2519 can vary depending on the exact cause of the issue, but it may involve labor costs for diagnosis and parts replacement if needed.

9. Can a DIY enthusiast fix the OBDII code P2519 at home?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair P2519 at home by following repair guides and using appropriate diagnostic equipment.

10. Are there any recalls related to the OBDII code P2519?

Recalls related to P2519 can vary by vehicle make and model, so it is recommended to check with the manufacturer or a trusted automotive service provider for any recall information specific to your vehicle.