Nissan Sentra B18 (2020-2025) Service Manual: P0452 Evap Control System Pressure Sensor

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P0452 Evap Control System Pressure Sensor

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0452	EVAP SYS PRES SEN (Evaporative emission system pressure sensor/switch low)	Diagnosis condition	—
		Signal (terminal)	EVAP control system pressure sensor signal
		Threshold	An excessively low voltage from the sensor is sent to ECM
		Diagnosis delay time	—

POSSIBLE CAUSE

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

FAIL-SAFE

Not applicable

Confirmation Procedure

Confirmation Procedure

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.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

Start the engine and warm it up to normal operating temperature.
Turn ignition switch OFF and wait at least 10 seconds.
Turn ignition switch ON.
Select “DATA MONITOR” mode of “ENGINE” using CONSULT.
Make sure that “FUEL T/TMP SE” indication is more than 0°C (32°F).
Start the engine and wait at least 20 seconds.
Check 1st trip DTC.

With GST

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

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

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

Make sure that the voltage is less than 4.2 V.
Turn ignition switch OFF and wait at least 10 seconds.
Start engine and wait at least 20 seconds.
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

DTC Diagnosis Procedure

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER

Turn ignition switch OFF.
Disconnect EVAP control system pressure sensor harness connector.

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.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY

Turn ignition switch ON.

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

+	−	Voltage (Approx.)
B65	3	Ground	5 V

−

Voltage

(Approx.)

EVAP control system pressure sensor

Connector

Terminal

B65

Ground

5 V

Is the inspection result normal?

YES >>

GO TO 4.

NO >>

GO TO 3.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

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	Continuity
B65	3	E16	135	Existed

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.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT

Turn ignition switch OFF.
Disconnect ECM harness connector.

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	Continuity
B65	1	E16	158	Existed

Also check harness for short to power.

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

Repair or replace malfunctioning part.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR SIGNAL CIRCUIT

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	Continuity
B65	2	E16	131	Existed

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.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Check the EVAP control system pressure sensor. Refer to Component Inspection.

Is the inspection result normal?
YES >>
INSPECTION END
NO >>
Replace EVAP control system pressure sensor. Refer to Exploded View.

P0451 Evap Control System Pressure Sensor

Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble ...

P0453 Evap Control System Pressure Sensor

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