Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0451 EVAP control system pressure sensor
DTC Logic

DTC DETECTION LOGIC

NOTE: If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to EC344, "DTC Logic".

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0451 EVAP SYS PRES SEN (EVAP control system pressure sensor performance) ECM detects a sloshing signal from the EVAP control system pressure sensor
  • Harness or connectors (EVAP control system pressure sensor circuit is shorted.) [Crankshaft position sensor (POS) circuit is shorted.] (Battery current sensor circuit is shorted.) (Refrigerant pressure sensor circuit is shorted.) (Accelerator pedal position sensor 2 circuit is shorted.)
  • EVAP control system pressure sensor
  • Crankshaft position sensor (POS)
  • Battery current sensor
  • Refrigerant pressure sensor
  • Accelerator pedal position sensor

DTC 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.

>> GO TO 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn ignition switch OFF and wait at least 10 seconds.
  2. Start engine and wait at least 40 seconds.

    NOTE: Do not depress accelerator pedal even slightly.

  3. Check 1st trip DTC.

Is 1st trip DTC detected?

YES >> Proceed to EC, "Diagnosis Procedure".

NO >> INSPECTION END

    More about «P0451 EVAP control system pressure sensor»:

    DTC Logic

    Diagnosis Procedure

    Component Inspection

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