Nissan Rogue (T33) 2021-Present Service Manual: P0451 Barometric Pressure Sensor A/b

Nissan Rogue (T33) 2021-Present Service Manual / Engine :: Engine Control System / Kr15ddt :: Dtc/circuit Diagnosis / P0451 Barometric Pressure Sensor A/b

DTC Description

DTC DETECTION LOGIC

DTC

CONSULT screen terms

(Trouble diagnosis content) 		DTC detection condition
P0451 00

Barometric pressure sensor A/B

(EVAP System Pressure Sensor/Switch "A" Circuit Range/Performance 		Diagnosis condition —
Signal (terminal) EVAP control system pressure sensor signal
Threshold ECM detects a state that the pressure difference remains the threshold value or more for continuously for 5 seconds or more under the condition that the pressure of the EVAP control system pressure sensor and that of the ECM (built-in barometric pressure sensor) are equal.
Diagnosis delay time —

POSSIBLE CAUSE

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

  • EVAP control system pressure sensor

  • ECM (built-in barometric pressure sensor)

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

NOTE:

Never remove fuel filler cap during DTC confirmation procedure.

CHECK DTC PRIORITY

If DTC P0451 is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index

NO>>

GO TO 2.

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.

With CONSULT>>

GO TO 3.

With GST>>

GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn ignition switch ON.

  2. Check 1st trip DTC.

Is DTC detected?

YES>>

Refer to DTC Diagnosis Procedure.

NO>>

GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE-II

With CONSULT

  1. On CONSULT screen, select “ENGINE”>>“Data Monitor”>>“EVAP DIAG READY”.

  2. Let it idle until “OFF” of “EVAP DIAG READY” changes to “ON”.

    NOTE:

    It will take at most 2 hours until “OFF” of “EVAP DIAG READY” changes to “ON”.

  3. Turn ignition switch OFF and wait at least 90 minutes.

    NOTE:

    Never turn ignition switch ON during 90 minutes.

  4. Turn ignition switch ON.

  5. On CONSULT screen, select “ENGINE”>>“Data Monitor”>>“EVAP LEAK DIAG”.

  6. Check that “EVAP LEAK DIAG” indication.

Which is displayed on CONSULT?

CMPLT>>

GO TO 5.

YET>>

  1. Perform DTC CONFIRMATION PROCEDURE again.

  2. GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE-III

With CONSULT

Check 1st trip DTC.

Is DTC P0451 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.

PERFORM DTC CONFIRMATION PROCEDURE-IV

With GST

  1. Start engine and let it idle for least 40 seconds.

    NOTE:

    Do not depress accelerator pedal even slightly.

  2. Check 1st trip DTC.

Is DTC P0451 detected?

YES>>

Proceed to DTC Diagnosis Procedure.

NO>>

GO TO 7.

PERFORM DTC CONFIRMATION PROCEDURE-V

With GST

  1. Let it idle for at least 2 hours.

  2. Turn ignition switch OFF and wait at least 90 minutes.

    NOTE:

    Never turn ignition switch ON during 90 minutes.

  3. Turn ignition switch ON.

  4. Check 1st trip DTC.

Is DTC P0451 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

CHECK DTC PRIORITY

If DTC P0451 is displayed with other DTC, first perform the confirmation procedure (trouble diagnosis) for other DTC.

Is applicable DTC detected?

YES>>

Perform diagnosis of applicable. Refer to DTC Index

NO>>

GO TO 2.

CHECK HOSE AND PIPING

  1. Turn ignition switch OFF.

  2. Check the following.

    • Blockage, crush, or damage in the hose and the piping of EVAP purge line between fuel tank and intake manifold.

    • Blockage, crush, or damage in the hose and the piping of intake air passage between inlet air duct and intake manifold.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace error-detected parts.

CHECK INTERMITTENT INCIDENT

Refer to Intermittent Incident.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace error-detected parts.

REPLACE EVAP CANISTER

Replace EVAP canister. Refer to Removal and Installation.

>>

GO TO 5.

PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn ignition switch ON.

  2. Erase DTC.

  3. Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC P0451 detected?

YES>>

Replace ECM (Built in barometric pressure sensor)

NO>>

INSPECTION END

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