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. Are any of the following displayed as current or do they have high past counts on the CONSULT screen:
  - P0101-00
  - P0102-00
  - P0103-00
  - P0107-00
  - P0108-00
  - P012B-00
  - P012C-00
  - P012D-00
  - P0299-00
  - P0471-00
  - P0472-00
  - P0473-00
  - P2280-00
  - P2580-00
  - Any turbocharger DTCs
  - Any EGR bypass DTCs
  - Any EGR valve DTCs
Is applicable DTC detected?

YES

Refer to DTC Index .

NO

GO TO 2 .
CHECK EGR VALVE
1. Turn ignition switch OFF.
2. Remove the EGR valve from the engine.
3. Inspect the EGR valve,
  - Check for a stuck open EGR valve.
  - Check for a damaged EGR valve that allows flow when closed.
Is the inspection result normal?

YES

GO TO 3 .

NO

Replace EGR valve. Refer to Removal and Installation .
CHECK EXHAUST GAS PRESSURE SENSOR TUBE
1. Turn ignition switch ON.
2. Remove the exhaust gas pressure sensor tube.
3. Inspect the exhaust gas pressure sensor tube.
  - Inspect the inside of the tube. If clogged, use compressed air to remove debris or soot buildup.
  - Check the tube for cracks and thread damage.
Is the inspection result normal?

YES

Inspection End.

NO

Replace or repair the exhaust gas pressure sensor tube. Refer to Removal and Installation .