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 other existing "ENGINE" diagnostic trouble codes.
If DTC P0687-00 is present, perform the confirmation procedure (trouble diagnosis) for this other DTC first.

Is applicable DTC detected?

YES

Perform diagnosis of applicable DTC. Refer to DTC Description .

NO

GO TO 2 .
CHECK FOR CURRENT DEF QUALITY SENSOR DTC
Check for DTC P2045-00 current on the CONSULT screen.

Is applicable DTC current?

YES

GO TO 3 .

NO

Refer to Intermittent Incident .
INSPECT DEF SUPPLY PUMP ASSEMBLY AND ELECTRICAL CONNECTIONS
1. Turn ignition switch OFF.
2. Disconnect the DEF supply pump assembly connector.
3. Inspect connector and pins for the following:
  - Loose connector.
  - Corroded pins.
  - Bent or broken pins.
  - Pushed back or expanded pins.
  - Moisture in or on the connector.
  - Missing or damaged connector seals.
  - Dirt or debris on or in the connector pins.
  - Connector shell broken.
  - Wire insulation damage.
  - Damaged connector locking tab.
Is the inspection result normal?

YES

An internal error has been detected in the aftertreatment DEF quality temperature sensor circuit. Replace the aftertreatment DEF supply pump assembly. Refer to Exploded View .

NO

Repair or replace error-detected parts. GO TO 4 .
CHECK FOR INACTIVE DTC
1. Connect all harness connectors.
2. Turn ignition switch ON.
3. Connect CONSULT, and erase "ENGINE" diagnostic trouble codes.
4. Operate the engine within the "Conditions for Clearing DTC".
5. Using CONSULT, check for "ENGINE" diagnostic trouble codes.
Is P2045-00 DTC current?

YES

Diagnosis procedure needs to be repeated. Refer to DTC Description .

NO

The removal and installation of the connector corrected the issue.