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Home >> Infiniti >> 2009 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0327 To P0850 >> DTC P0451: EVAP Control System Pressure Sensor >> DTC Confirmation Procedure

DTC Confirmation Procedure

  1. If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting the next step.
    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.
  2. Start engine and wait at least 40 seconds.
    NOTE: Do not depress accelerator pedal even slightly.
  3. Check 1st trip DTC.
  4. If 1st trip DTC is detected, go to "DIAGNOSIS PROCEDURE ".
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