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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 618 (Engine Control System (DTC/Circuit Diagnosis) (10 Of 17)) >> DTC/Circuit Diagnosis >> DTC P0451: EVAP Control System Pressure Sensor >> DTC Description >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2020 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0451

Barometric pressure sensor A/B

(EVAP System Pressure Sensor/Switch "A" Circuit Range/Performance)

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 barometric pressure sensor are equal.

  • Harness or connectors

    (EVAP control system pressure sensor circuit is shorted.)

  • EVAP control system pressure sensor
  • ECM (built in barometric pressure sensor)