CAR OBD CODES

P0531 OBD Code Definition:
P0531 Air Conditioning (A/C) Refrigerant Pressure (Sensor A) Circuit Range / Performance
P0531 OBD Code Description:

OBD2 Code P0531 Definition:
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. Symptoms

Possible sumptoms of P0531
– Engine Light ON (or Service Engine Soon Warning Light) – A/C Inoperative – A/C Blows Warm Possible Causes

Possible causes of P0531
– 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 P0531 code is detected when the signal circuit is out of range for 20 seconds. Possible Solutions

Note: The information on the P0531 error code is purely informative, if you need more useful information, please consult your technician.