Nissan Rogue Service Manual: P0127 IAT sensor
DTC Description
DTC DETECTION LOGIC
| DTC No. | CONSULT screen terms (Trouble diagnosis content) | DTC detecting condition |
| P0127 | IAT SENSOR-B1 (Intake air temperature too high) | Rationally incorrect voltage from the sensor is sent to ECM, compared with the voltage signal from engine coolant temperature sensor. |
POSSIBLE CAUSE
- Harness or connectors (Intake air temperature sensor circuit is open or shorted.)
- Intake air temperature sensor
FAIL-SAFE
Not applicable
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION: This test may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a road test is expected to be easier, it is unnecessary to lift the vehicle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
- Wait until engine coolant temperature is less than 96°C (205°F)
- Turn ignition switch ON.
- Select “DATA MONITOR” mode of “ENGINE” using CONSULT.
- Check the engine coolant temperature.
- If the engine coolant temperature is not less than 96°C (205°F), turn ignition switch OFF and cool down engine.
NOTE: Perform the following steps before engine coolant temperature is above 96°C (205°F).
- Turn ignition switch ON.
- Select “DATA MONITOR” mode of “ENGINE” using CONSULT
- Start engine.
- Hold vehicle speed at more than 70 km/h (43 MPH) for 100
consecutive seconds.
CAUTION: Always drive vehicle at a safe speed.
- Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT” above.
Is 1st trip DTC detected? YES >> Proceed to EC-221, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
Is the inspection result normal? YES >> GO TO 2.
NO >> Replace mass air flow sensor (with intake air temperature sensor). Refer to EM-24, "Exploded View".
2.CHECK INTERMITTENT INCIDENT
Refer to GI-41, "Intermittent Incident".
>> INSPECTION END
Component Inspection
1.CHECK INTAKE AIR TEMPERATURE SENSOR
- Turn ignition switch OFF.
- Disconnect mass air flow sensor harness connector and reconnect it again.
- Turn ignition switch ON.
- Select “DATA MONITOR” mode with CONSULT.
- Check that “INT/A TEMP SEN” indicates as per following condition.
| Monitor item | Condition | Value (Approx.) | |
| INT/A TEMP SEN | Temperature [°C (°F)] | 25 (77) | 1.9 - 2.1 (V) |
Is the inspection result normal? YES >> INSPECTION END
NO >> Replace mass air flow sensor (with intake air temperature sensor). Refer to EM-24, "Exploded View".
P0125 ECT sensor
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0125
ECT SENSOR
(Insufficient coolant temperature ...
P0128 thermostat function
DTC Description
DTC DETECTION LOGIC
Engine coolant temperature has not risen enough to open the thermostat even
though the engine has run long
enough.
This is due to a leak in the seal or the ...
Other materials:
P155D generator
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P155D
GENERATOR
(Generator)
ECM receives mechanical malfunction signal sent from generator.
ECM receives electrical malfunction ...
Intermittent incident
DESCRIPTION
Sometimes the symptom is not present when the vehicle is brought in for
service. If possible, re-create the
conditions present at the time of the incident. Doing so may help avoid a No
Trouble Found Diagnosis. The following section illustrates ways to simulate the
conditions/envi ...
P1226 TP sensor
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P1226
CTP LEARNING-B1
(CTP LEARNING-B1)
Closed throttle position learning is not performed successfully,
repeatedly
POSSIBLE CAUSE
Elect ...