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Nissan Sentra B18 (2020-2025) Service Manual: P0531 A/c Refrigerant Pressure Sensor

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC No.

Trouble diagnosis name

DTC detecting condition

P0531

REFRIGERANT PRESS SENSOR A

(A/C refrigerant pressure sensor A circuit range/performance

ECM detects that input signal from the refrigerant pressure sensor is out of the specified range

POSSIBLE CAUSE

  • Harness or connectors

  • Refrigerant pressure sensor

FAIL-SAFE

Not applicable

Confirmation Procedure

Confirmation Procedure

  1. PRECONDITIONING

    If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

    1. Turn ignition switch OFF and wait at least 10 seconds.

    2. Turn ignition switch ON.

    3. Turn ignition switch OFF and wait at least 10 seconds.

    TESTING CONDITION:

    Before performing the following procedure, confirm that battery voltage is 11 V or more under ignition switch OFF condition.

    >>

    GO TO 2.

  2. PERFORM DTC CONFIRMATION PROCEDURE

    1. Start engine and run it for at least 10 seconds at idle speed.

    2. Check 1st trip DTC.

    Is 1st trip DTC detected?

    YES >>

    Refer to DTC Diagnosis Procedure.

    NO >>

    INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

  1. CHECK REFRIGERANT PRESSURE SENSOR

    Refer to Diagnosis Procedure.

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Replace refrigerant pressure sensor. Refer to Removal and Installation(AUTOMATIC AIR CONDITIONER) or Removal and Installation(MANUAL AIR CONDITIONER).

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