Nissan Sentra B18 (2020-2025) Service Manual: P0453 Evap Control System Pressure Sensor

Dtc Description

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (EVAP control system pressure sensor circuit is shorted.)

• EVAP control system pressure sensor

FAIL-SAFE

Not applicable

Confirmation Procedure

1. PRECONDITIONING

   If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

   TESTING CONDITION:

   Always perform test at a temperature of 5°C (41°F) or more.

   >>

   GO TO 2.

2. PERFORM DTC CONFIRMATION PROCEDURE

   With CONSULT

   1. Start the engine and warm it up to normal operating temperature.

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

   3. Turn ignition switch ON.

   4. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.

   5. Make sure that “FUEL T/TMP SE” indication is more than 0°C (32°F).

   6. Start the engine and wait at least 20 seconds.

   7. Check 1st trip DTC.

   With GST

   1. Start the engine and warm it up to normal operating temperature.

   2. Set voltmeter probes to ECM harness connector terminals as per the following.

      ECM			Voltage
      Connector	+	−
      	Terminal
      E16	138	158	Less than 4.2 V

   3. Make sure that the voltage is less than 4.2 V.

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

   5. Start engine and wait at least 20 seconds.

   6. Check 1st trip DTC.

   Is 1st trip DTC detected?

   YES >>

   Proceed to DTC Diagnosis Procedure.

   NO-1 >>

   To check malfunction symptom before repair: Refer to Intermittent Incident.

   NO-2 >>

   Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

1. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER

   1. Turn ignition switch OFF.

   2. Disconnect EVAP control system pressure sensor harness connector.

   3. Check sensor harness connector for water.

      Water should not exist.

   Is the inspection result normal?

   YES >>

   GO TO 2.

   NO >>

   Repair or replace harness connector.

2. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY

   1. Turn ignition switch ON.

   2. Check the voltage between EVAP control system pressure sensor harness connector and ground.

      +		−	Voltage (Approx.)
      EVAP control system pressure sensor
      Connector	Terminal
      B65	3	Ground	5 V

   Is the inspection result normal?

   YES >>

   GO TO 4.

   NO >>

   GO TO 3.

3. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

   3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

      EVAP control system pressure sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      B65	3	E16	135	Existed

   4. Also check harness for short to ground and to power.

   Is the inspection result normal?

   YES >>

   Perform the trouble diagnosis for power supply circuit.

   NO >>

   Repair or replace malfunctioning part.

4. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT

   1. Turn ignition switch OFF.

   2. Disconnect ECM harness connector.

   3. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

      EVAP control system pressure sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      B65	1	E16	158	Existed

   4. Also check harness for short to power.

   Is the inspection result normal?

   YES >>

   GO TO 5.

   NO >>

   Repair or replace malfunctioning part.

5. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SIGNAL CIRCUIT

   1. Check the continuity between EVAP control system pressure sensor harness connector and ECM harness connector.

      EVAP control system pressure sensor		ECM		Continuity
      Connector	Terminal	Connector	Terminal
      B65	2	E16	131	Existed

   2. Also check harness for short to ground and to power.

   Is the inspection result normal?

   YES >>

   GO TO 6.

   NO >>

   Repair or replace malfunctioning part.

6. CHECK RUBBER TUBE

   1. Disconnect rubber tube connected to EVAP canister vent control valve.

   2. Check the rubber tube for clogging.

   Is the inspection result normal?

   YES >>

   GO TO 7.

   NO >>

   Clean the rubber tube using an air blower, repair or replace rubber tube.

7. CHECK EVAP CANISTER VENT CONTROL VALVE

   Refer to Component Inspection.

   Is the inspection result normal?

   YES >>

   GO TO 8.

   NO >>

   Replace EVAP canister vent control valve. Refer to Exploded View.

8. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

   Refer to Component Inspection.

   Is the inspection result normal?

   YES >>

   GO TO 9.

   NO >>

   Replace EVAP control system pressure sensor. Refer to Exploded View.

9. CHECK IF EVAP CANISTER IS SATURATED WITH WATER

   1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor attached.

   2. Check if water will drain from the EVAP canister.

      

   Does water drain from EVAP canister?

   YES >>

   GO TO 10.

   NO >>

   INSPECTION END

10. CHECK EVAP CANISTER

    Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor attached.

    The weight should be less than 2.1 kg (4.6 lb).

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    GO TO 11.

11. DETECT MALFUNCTIONING PART

    Check the following.

    • EVAP canister for damage

    • EVAP hose between EVAP canister and Nissan Sentra vehicle frame for clogging or poor connection

    >>

    Repair hose or replace EVAP canister. Refer to Removal and Installation.

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