Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DTC PRIORITY
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
1. If DTC P1451 is displayed with DTC P0452 or P0453, first perform the trouble diagnosis for DTC P0452 or P0453.
YES

Perform diagnosis of applicable.
- DTC P0452: Refer to DTC Description .
- DTC P0453: Refer to DTC Description .
NO

GO TO 2 .
CHECK HOSES AND PIPING
1. Turn ignition switch OFF.
2. Check the following.
  - Blockage, crush, or damage in the hose and the piping of EVAP purge line between fuel tank and intake manifold.
  - Blockage, crush, or damage in the hose and the piping of intake air passage between inlet air duct and intake manifold.
Is the inspection result normal?

YES

GO TO 3 .

NO

Repair or replace harness connector.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Check EVAP control system pressure sensor. Refer to Component Inspection (EVAP Control System Pressure Sensor) .
Is the inspection result normal?

YES

Check Intermittent Incident. Refer to Intermittent Incident .

NO

Replace EVAP control system pressure sensor.