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 P1A7A-00 being current or past on the CONSULT screen.
Is applicable DTC detected?

YES

GO TO 2.

NO

Refer to Intermittent Incident .
CHECK COOLANT LEVEL
Check coolant level.

Is coolant level low?

YES

Check the cause of low coolant level. Refer to Coolant Loss - External .

NO

GO TO 3 .
INSPECT COOLANT LEVEL SENSOR AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect coolant level sensor connector E91.
3. Inspect the harness and sensor connector 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

Replace coolant level sensor. Refer to Removal and Installation .

NO

Repair or replace error-detected parts.