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AutoCodes - Generic - P2520

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

- Code Popularity: 6,712 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P2520?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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
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How to Fix the DTC P2520?

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

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2520 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P2520 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 P2520 - A/C Request 'A' Circuit Low - AutoCodes.com
P2520 Code - A/C Request 'A' Circuit Low

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Code P2520 comments

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