OBD Code P0534

Air Conditioner Refrigerant Charge Loss

What’s mean?

OBD2 Code P0534 Definition:
The powertrain control module (ECM) 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 ECM 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.

Symptoms

Possible sumptoms of P0534
– Engine Light ON (or Service Engine Soon Warning Light) – A/C Inoperative – A/C Blows Warm

Possible Causes

Possible causes of P0534
– A/C system low or over charge with refrigerant – Faulty A/C refrigerant pressure sensor – Cooling fans in-operative – A/C refrigerant pressure sensor circuit open or shorted The Error code is generally activated on detection of the following conditions: The ECM has detected that the AC compressor clutch cycle rate is high

Possible Solutions