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 multiple DTCs being current on the CONSULT screen.
Are DTCs other than P061B-00 detected?

YES

Refer to DTC Index .

NO

GO TO 2 .
CHECK FREEZE FRAME DATA
Read the DTC freeze frame data for DTC P061B-00.

Is the coolant temperature abnormally low for the operating conditions?

YES

Replace the coolant temperature sensor. Refer to Removal and Installation .

NO

GO TO 3 .
CHECK DATA MONITOR
Monitor the accelerator position sensor 1 and 2 data monitor items while depressing the accelerator pedal.

Are the voltage transition readings smooth?

YES

GO TO 4 .

NO

Refer to Intermittent Incident .
CHECK FREEZE FRAME DATA
Read the DTC freeze frame data for DTC P061B-00.

Is the exhaust gas pressure sensor reading higher than the boost pressure reading?

YES

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

NO

GO TO 5 .
CHECK FREEZE FRAME DATA
Read the DTC freeze frame data for DTC P061B-00.

Is the boost pressure reading higher than the exhaust gas pressure sensor reading?

YES

Replace the engine charge air cooler outlet pressure/temperature sensor. Refer to Removal and Installation .

NO

GO TO 6 .
CHECK DATA MONITOR
Monitor the brake switch data monitor item while depressing the brake pedal.

Does the brake switch status change accordingly?

YES

Refer to Intermittent Incident .

NO

GO TO 7 .
INSPECT STOP LAMP SWITCH/RELAY AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect the stop lamp switch connector E38 (with LED rear combination lamps).
3. Disconnect the stop lamp relay connector E12 (without LED rear combination lamps).
4. Inspect the harness and sensor/relay 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 the stop lamp switch Exploded View .

NO

Repair or replace harness or connectors.