Diagnosis Procedure

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

CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Check for DTC P2BAD - 00 being current on the CONSULT screen.
Is DTC P2BAD - 00 detected as current?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
CHECK DTC PRIORITY
1. Turn ignition switch ON.
2. Connect CONSULT and check for "ENGINE" diagnostic trouble codes.
3. Are any of the following displayed as current on the CONSULT screen:
  - P2201 - 00
  - P2202 - 00
  - P2209 - 00
  - P220A-00
  - U029D-00
Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 3 .
INSPECT INTAKE NOX SENSOR
1. Turn ignition switch OFF.
2. Inspect the intake NOx sensor installation.
Is the inspection result normal?

YES

GO TO 4 .

NO

Properly install the intake NOx sensor. Refer to Removal and Installation .
CHECK EXHAUST SYSTEM FOR LEAKS
1. Turn ignition switch OFF.
2. Inspect the exhaust system for the following:
  - Loose connections.
  - Leaking connections and broken exhaust system component.
Is the inspection result normal?

YES

Replace the intake NOx sensor. Refer to Removal and Installation .

NO

Repair or replace error-detected parts.