P0530 Code - Air Conditioning Refrigerant Pressure Sensor Circuit

What Does P0530 Mean?

The Powertrain Control Module (PCM) monitors the high side refrigerant pressure via a A/C refrigerant pressure sensor. When the pressure is high the signal voltage is high. When the pressure is low the signal voltage is low. When pressure is high the PCM commands the cooling fans on. When pressure is too high or too low the PCM will not allow the A/C compressor clutch to engage.

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What are the common causes of P0530 ?

The most common cause of this code being stored is due to a low freon condition in the air conditioning system. Other causes can include excessive system pressure, a faulty a/c refrigerant pressure switch (there are typically between 1 and 4 in a system, depending upon manufacturer), faulty electrical connectors, damaged, shorted, or open wiring, or a faulty climate control head.

How do you troubleshoot P0530 ?

Here are some of the potential repairs that the mechanics might have to make when they are fixing the P0503 code:

• Check the refrigerant in the system, and only add it if needed
• Check for excessive pressure in the system and make repairs to relieve it
• Replace or repair any damaged, shorted, or open wiring
• Replace the faulty control head
• Replace the faulty electrical connectors if they are present
• Replace the faulty A/C refrigerant pressure switch if it proves to be the cause of the problem

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