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 FOR CURRENT DTC
1. Turn ignition switch ON.
2. Connect CONSULT and check "ENGINE" diagnostic trouble codes.
3. Check for DTC P220A-00 being current on the CONSULT screen.
Is applicable DTC detected?

YES

GO TO 2 .

NO

Refer to Intermittent Incident .
CHECK FOR PRIORITY DTC
1. Using CONSULT, check for other "ENGINE" diagnostic trouble codes.
2. Check If any of the following DTCs are present:
  - P0562-00
  - P0563-00
Is applicable DTC current?

YES

Refer to DTC Index .

NO

GO TO 3 .
INSPECT THE INTAKE NOX SENSOR AND CONNECTOR PINS
1. Turn ignition switch OFF.
2. Disconnect the intake NOx sensor.
3. Inspect connector 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

GO TO 4 .

NO

Repair or replace error-detected parts.

CHECK THE VOLTAGE TO THE INTAKE NOX SENSOR

Turn ignition switch ON.
Measure the voltage between the voltage supply circuit and the ground circuit at the intake NOx sensor harness connector.

Intake NOx Sensor

Voltage

(Approx.)

Connector

Terminal (+)

Terminal (-)

C31

Battery voltage

Is the reading within 1 volt of battery voltage?

YES

GO TO 5 .

GO TO 7 .

CHECK FOR CORRECT INTAKE NOX SENSOR
1. Remove after treatment intake NOx sensor.
2. Verify intake NOx sensor is the correct sensor for this engine.
  NOTE: The after treatment intake NOx sensor is available in 12V or 24V versions.
Is this intake NOx sensor the correct sensor for this engine?

YES

GO TO 6 .

NO
- Replace the after treatment intake NOx sensor. Refer to Removal and Installation .
- GO TO 9 .
CHECK CONDITION OF THE INTAKE NOX SENSOR
1. Turn ignition switch OFF.
2. Reinstall the intake NOx sensor and connect all harness connectors.
3. Start the engine.
4. Operate the engine until the diesel oxidation catalyst intake temperature is above 150°C (302°F).
  NOTE: The exhaust gas temperature at the after treatment intake NOx sensor must be above 150°C (302°F) before the sensor can perform its internal diagnostics.
5. Using CONSULT, check for "ENGINE" diagnostic trouble codes.
Is P220A-00 DTC current?

YES
- Verify the integrity of the intake NOx sensor. Refer to Removal and Installation .
- Replace the intake NOx sensor if necessary.Refer to Removal and Installation .
NO
- The removal and installation of the connector corrected the issue.
- GO TO 9 .
CHECK THE BATTERY CONNECTION
1. Turn ignition switch OFF.
2. Check the battery terminals and connections.
Is the battery connection tight and corrosion-free?

YES

GO TO 8 .

NO
- Tighten any loose connections and clean the terminals.
- GO TO 9 .

CHECK INTAKE NOX SENSOR VOLTAGE SUPPLY CIRCUIT FOR OPEN

Disconnect the intake NOx sensor.
Turn ignition switch ON.
Measure the voltage between the voltage supply circuit at the intake NOx sensor harness connector and engine block ground.

Intake NOx sensor