Nissan Sentra manuals

Nissan Sentra Service Manual: P0112, P0113 IAT Sensor

Nissan Sentra Service Manual / Engine / Engine control system / Dtc/circuit diagnosis / P0112, P0113 IAT Sensor

DTC Logic

DTC DETECTION LOGIC

DTC No.

 CONSULT screen terms (Trouble diagnosis content)

 DTC detecting condition

 Possible cause
P0112 IAT SEN/CIRCUIT- B1 (Intake air temperature sensor 1 circuit low bank 1) An excessively low voltage from the intake air temperature sensor is sent to ECM.
  • Harness or connectors (Intake air temperature sensor circuit is open or shorted.)
  • Intake air temperature sensor
P0113 IAT SEN/CIRCUIT- B1 (Intake air temperature sensor 1 circuit high bank 1) An excessively high voltage from the intake air temperature sensor is sent to ECM.

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

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 2.

2.PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn ignition switch ON and wait at least 5 seconds.
  2. Check 1st trip DTC.

Is 1st trip DTC detected? YES >> Proceed to EC-194, "Diagnosis Procedure".

NO >> INSPECTION END

Diagnosis Procedure

1.CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY

  1. Turn ignition switch OFF.
  2. Disconnect mass air flow sensor (with intake air temperature sensor) harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between mass air flow sensor harness connector and ground.

Is the inspection result normal?


Is the inspection result normal? YES >> GO TO 3.

NO >> GO TO 2.

2.CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector
  3. Check the continuity between mass air flow sensor harness connector and ECM harness connector.


  1. Also check harness for short to ground.

Is the inspection result normal? YES >> Perform the trouble diagnosis for power supply circuit.

NO >> Repair or replace error-detected parts.

3.CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between mass air flow sensor harness connector and ECM harness connector.


  1. Also check harness for short to power.

Is the inspection result normal? YES >> GO TO 4.

NO >> Repair or replace error-detected parts.

4.CHECK INTAKE AIR TEMPERATURE SENSOR

Check the intake air temperature sensor. Refer to EC-195, "Component Inspection (IAT Sensor)".

Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".

NO >> Replace mass air flow sensor (with intake air temperature sensor). Refer to EM-25, "Exploded View".

Component Inspection (IAT Sensor)

1.CHECK INTAKE AIR TEMPERATURE SENSOR

  1. Turn ignition switch OFF.
  2. Disconnect mass air flow sensor harness connector and reconnect it again.
  3. Turn ignition switch ON.
  4. On CONSULT screen, select “ENGINE” >> “DATA MONITOR” >> “INT/A TEMP SEN”.
  5. Check that the indicated value of “INT/A TEMP SEN” is almost the same as intake air temperature.

Is the inspection result normal? YES >> INSPECTION END

NO >> Replace mass air flow sensor (with intake air temperature sensor). Refer to EM-25, "Exploded View".

P0111 IAT Sensor
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P0111 IAT SENSOR 1 B1 (Intake air temp ...

P0116 ECT Sensor
DTC Logic DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P0116 ECT SEN/CIRC (Engine coolant tem ...

Other materials:

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER"
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain types of collision. Information necessary to service the system ...

Push-button ignition switch positions
LOCK (Normal parking position): The ignition switch can only be locked in this position. The ignition switch will be unlocked when it is pushed to the ACC position while carrying the Intelligent Key or with the Intelligent Key inserted in the port. The ignition switch will lock when any d ...

P0132 A/F SENSOR 1
DTC Logic DTC DETECTION LOGIC To judge the malfunction, the diagnosis checks that the A/F signal computed by ECM from the A/F sensor 1 signal is not inordinately high. DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P0 ...

© 2014-2026 Copyright b17.nisentra.com