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P0532 2018 GMC Sierra Code - A/C Refrigerant Pressure Sensor Circuit Low Input

Quick Answer

The P0532 diagnostic trouble code (DTC) for the 2018 GMC Sierra refers to the A/C Refrigerant Pressure Sensor Circuit Low Input. Common causes include Faulty A/C refrigerant pressure sensor, Damaged wiring or connectors in the sensor circuit, Low refrigerant levels in the A/C system. 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
P0532 2018 GMC Sierra indicates A/C Refrigerant Pressure Sensor Circuit Low Input.
Common causes
Common causes include Faulty A/C refrigerant pressure sensor, Damaged wiring or connectors in the sensor circuit, Low refrigerant levels in the A/C system.
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 11, 2024
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Code P0532 2018 GMC Sierra Description

The P0532 diagnostic trouble code (DTC) for the 2018 GMC Sierra refers to the A/C Refrigerant Pressure Sensor Circuit Low Input. This code indicates that there is an issue with the A/C refrigerant pressure sensor circuit, specifically detecting a lower than expected input signal. The A/C refrigerant pressure sensor is responsible for monitoring the pressure of the air conditioning system's refrigerant, which is crucial for the proper functioning of the A/C system.

OBDII Code P0532 2018 GMC Sierra - A/C Refrigerant Pressure Sensor Circuit Low Input
P0532 2018 GMC Sierra Code - A/C Refrigerant Pressure Sensor Circuit Low Input

Common Causes of P0532 2018 GMC Sierra

  1. Faulty A/C refrigerant pressure sensor.
  2. Damaged wiring or connectors in the sensor circuit.
  3. Low refrigerant levels in the A/C system.
  4. Malfunctioning A/C compressor.
  5. Issues with the A/C system control module.

Symptoms of P0532 2018 GMC Sierra

  1. Weak or inconsistent cooling from the A/C system.
  2. A/C system not blowing cold air at all.
  3. A/C compressor cycling on and off frequently.
  4. Illumination of the A/C warning light on the dashboard.
  5. Reduced fuel efficiency due to A/C system inefficiency.

How to Fix P0532 2018 GMC Sierra

  1. Diagnose the issue using a scan tool to retrieve the trouble codes and perform a visual inspection of the A/C refrigerant pressure sensor and its circuit.
  2. Test the A/C refrigerant pressure sensor for proper operation and replace it if necessary.
  3. Check for any damaged wiring or connectors in the sensor circuit and repair or replace as needed.
  4. Verify the refrigerant levels in the A/C system and recharge if low.
  5. Clear the trouble codes from the vehicle's computer and test the A/C system for proper operation.

Cost to Fix P0532 2018 GMC Sierra

The typical repair costs for addressing the P0532 code on a 2018 GMC Sierra can vary depending on the exact cause of the issue and the cost of replacement parts. In general, the cost of replacing a faulty A/C refrigerant pressure sensor can range from $100 to $200, while labor costs can range from $80 to $150 per hour. Additional costs may include refrigerant recharge and any necessary wiring repairs. Overall, the total repair cost for this issue can range from $200 to $500. It is advisable to consult with a trusted auto repair shop for a more accurate estimate based on the specific circumstances of the vehicle.

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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.

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