FixVault

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)