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P2520 Dodge Code - A/C Request 'A' Circuit Low

Quick Answer

The P2520 OBD-II diagnostic trouble code (DTC) for Dodge vehicles specifically relates to the A/C Request 'A' Circuit Low. Common causes include Faulty A/C request sensor, Wiring issues or loose connections in the A/C request circuit, ECM malfunction. 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
P2520 Dodge indicates A/C Request 'A' Circuit Low.
Common causes
Common causes include Faulty A/C request sensor, Wiring issues or loose connections in the A/C request circuit, ECM malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P2520 Dodge Description

The P2520 OBD-II diagnostic trouble code (DTC) for Dodge vehicles specifically relates to the A/C Request 'A' Circuit Low. This code indicates that there is a problem with the circuit that controls the air conditioning system in the vehicle, specifically that the voltage is lower than expected. The A/C request circuit is responsible for sending signals to the engine control module (ECM) to request air conditioning operation based on the driver's input. When this circuit is not functioning properly, it can lead to issues with the air conditioning system, affecting the comfort and temperature control inside the vehicle.

OBDII Code P2520 Dodge - A/C Request 'A' Circuit Low
P2520 Dodge Code - A/C Request 'A' Circuit Low

Common Causes of P2520 Dodge

  1. Faulty A/C request sensor.
  2. Wiring issues or loose connections in the A/C request circuit.
  3. ECM malfunction.
  4. Low refrigerant levels in the air conditioning system.
  5. Faulty air conditioning compressor.

Symptoms of P2520 Dodge

  1. Lack of cold air coming from the air conditioning system.
  2. Inconsistent or intermittent cooling performance.
  3. Air conditioning system not responding to driver input.
  4. Check Engine Light (CEL) illuminated on the dashboard.

How to Fix P2520 Dodge

  1. Begin by checking the A/C request sensor and its wiring for any visible damage or loose connections. Replace the sensor if necessary.
  2. Inspect the wiring harness for any signs of wear, corrosion, or damage. Repair or replace any damaged wiring.
  3. Test the ECM to ensure it is functioning correctly. If the ECM is faulty, it may need to be reprogrammed or replaced.
  4. Check the refrigerant levels in the air conditioning system and top up if necessary. Look for any leaks that may be causing low refrigerant levels.
  5. Finally, test the air conditioning system to ensure proper operation after completing the repairs.

Cost to Fix P2520 Dodge

The cost of repairing the A/C Request 'A' Circuit Low code can vary depending on the specific cause of the issue. On average, the parts and labor for this repair could range from $100 to $500. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is recommended to check with local repair shops for a more accurate estimate.

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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 P2520 Dodge Code

1. What are the common symptoms of OBDII code P2520 (A/C Request 'A' Circuit Low) in a Dodge vehicle?

- Common symptoms include the air conditioning system not functioning properly, reduced cooling performance, and the A/C compressor not engaging.

2. What are the possible causes of OBDII code P2520 in a Dodge vehicle?

- The code P2520 can be triggered by issues such as a faulty A/C pressure sensor, damaged wiring or connectors in the A/C system circuit, or a malfunctioning A/C control module.

3. How can I diagnose the cause of OBDII code P2520 in my Dodge vehicle?

- To diagnose the cause of code P2520, you may need to perform a thorough visual inspection of the A/C system components, check the A/C pressure sensor for proper operation, and use an OBDII scanner to retrieve additional diagnostic trouble codes.

4. Is it safe to continue driving with OBDII code P2520 present in my Dodge vehicle?

- It is not recommended to drive with code P2520 present, as it can lead to further damage to the A/C system and potentially affect the overall performance of your vehicle's cooling system.

5. Can I reset OBDII code P2520 in my Dodge vehicle by disconnecting the battery?

- While disconnecting the battery may temporarily clear the code, it is not a recommended method for resolving the underlying issue causing code P2520. It is best to diagnose and repair the root cause of the code.

6. What are some repair tips for fixing OBDII code P2520 in a Dodge vehicle?

- Repair tips may include checking and repairing any damaged wiring or connectors in the A/C system circuit, replacing a faulty A/C pressure sensor, and ensuring proper communication between the A/C control module and other components.

7. Can a DIY enthusiast fix OBDII code P2520 in a Dodge vehicle, or is it best left to professionals?

- Depending on your level of automotive expertise, you may be able to address code P2520 by following repair guides and using the necessary tools. However, complex electrical issues may require professional assistance.

8. How much does it typically cost to repair OBDII code P2520 in a Dodge vehicle?

- The cost of repairing code P2520 can vary depending on the root cause of the issue, the need for replacement parts, and whether you choose to address the problem yourself or seek professional help. Costs may range from a few hundred dollars to over a thousand dollars.

9. How long does it take to repair OBDII code P2520 in a Dodge vehicle?

- The repair time for code P2520 can vary based on the complexity of the issue and the availability of parts. Simple fixes may take a few hours, while more intricate repairs could extend the process to a day or more.

10. Can extreme weather conditions or driving habits contribute to triggering OBDII code P2520 in a Dodge vehicle?

- Extreme weather conditions, such as high temperatures, or frequent use of the A/C system in demanding situations, may potentially contribute to triggering code P2520 by putting additional stress on the A/C components. Regular maintenance and proper usage can help prevent such issues.

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