Nissan Rogue (T33) 2021-Present Service Manual: P0128 Thermostat Function

DTC Description

DTC DETECTION LOGIC

Engine coolant temperature has not risen enough to open the multi-way control valve even though the engine has run long enough.

This is due to a leak in the seal or the multi-way control valve being stuck open.

POSSIBLE CAUSE

• Multi-way control valve

• Leakage from multi-way control valve

• Engine coolant temperature sensor 1

FAIL-SAFE

Not applicable

DTC Confirmation Procedure

NOTE:

Never refuel before and during the following procedure.

CHECK DTC PRIORITY

If DTC P0128 is displayed with DTC P0300, P0301, P0302 or P0303, first perform the trouble diagnosis for DTC P0300, P0301, P0302 or P0303.

Is applicable DTC detected?

Perform diagnosis of applicable. Refer to DTC Index.

GO TO 2.

PRECONDITIONING-1

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.

3. Turn ignition switch OFF and wait at least 10 seconds.

GO TO 3.

PRECONDITIONING-2

With CONSULT

1. Turn ignition switch ON.

2. Check the following conditions:

   Ambient temperature	−10°C (14°F) or more
   A/C switch	OFF
   Blower fan switch	OFF

3. Select “DATA MONITOR” mode of “ENGINE” using CONSULT.

4. Check the following conditions:

   COOLAN TEMP/S

   [(−10°C) – (+52°C) (14 – 126°F)]

Is the condition satisfied?

GO TO 4.

1. Satisfy the condition.

2. GO TO 4.

PERFORM DTC CONFIRMATION PROCEDURE-1

With CONSULT

1. Start engine.

2. Drive the Nissan Ariya vehicle until the following condition is satisfied.

   CAUTION:

   Always drive vehicle at safe speed.

   1. STEP 1

      Drive the Nissan Ariya vehicle under the conditions instructed below until the difference between “COOLAN TEMP/S” and “FUEL T/TMP SE” becomes at least 23°C (73°F).

      COOLAN TEMP/S	68°C (154°F) or less
      FUEL T/TMP SE	Less than the value calculated by subtracting 28°C (82°F) from “COOLAN TEMP/S”.*

      *: Example

      COOLAN TEMP/S	FUEL T/TMP SE
      65°C (149°F)	37°C (99°F) or less
      60°C (140°F)	32°C (89°F) or less

   2. STEP 2

      Drive the Nissan Ariya vehicle at 60 km/h (37 MPH) or more with the difference between “COOLAN TEMP/S” and “FUEL T/TMP SE” maintained at 28°C (82°F) or more.

      NOTE:

      Keep the accelerator pedal as steady as possible during cruising.

   3. STEP 3

      Drive the Nissan Ariya vehicle at 60 km/h (37 MPH) or more until “COOLAN TEMP/S” increases by 6°C (43°F).

      NOTE:

      Keep the accelerator pedal as steady as possible during cruising.

Is the condition satisfied?

GO TO 5.

GO TO 2.

PERFORM DTC CONFIRMATION PROCEDURE-2

With CONSULT

1. Drive the Nissan Ariya vehicle until the following condition is satisfied.

   COOLAN TEMP/S

   68°C (154°F) or more

   CAUTION:

   Always drive Nissan Ariya vehicle at safe speed.

2. Check 1st trip DTC.

Is 1st trip DTC detected?

Refer to DTC Diagnosis Procedure.

To check malfunction symptom before repair: Refer to Intermittent Incident.

Confirmation after repair: INSPECTION END

DTC Diagnosis Procedure

CHECK DTC PRIORITY

If DTC P0128 is displayed with DTC P0300, P0301, P0302 or P0303, first perform the trouble diagnosis for DTC P0300, P0301, P0302 or P0303.

Is applicable DTC detected?

Perform diagnosis of applicable. Refer to DTC Index.

GO TO 2.

CHECK ENGINE COOLANT TEMPERATURE SENSOR 1

Check the engine coolant temperature sensor 1. Refer to Component Inspection.

Is the inspection result normal?

GO TO 3.

Replace engine coolant temperature sensor 1. Refer to Removal and Installation.

CHECK MULTI-WAY CONTROL VALVE

Check the multi-way control valve. Refer to Component Inspection.

Is the inspection result normal?

INSPECTION END

Replace multi-way control valve. Refer to Removal and Installation.