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Home >> Infiniti >> 2024 >> QX80 Premium Select, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> Engine (ECM) >> DTC P0451: EVAP Control System Pressure Sensor >> DTC Description
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DTC Description

DTC DETECTION LOGIC 

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)