SFI SYSTEM, Diagnostic DTC:P0071,P0096,P0097,P0098 and P0099

DTC Code DTC Name
P0071 Ambient Air Temperature Sensor Circuit "A" Range / Performance
P0096 Intake Air Temperature Sensor 2 Circuit Range / Performance Bank 1
P0097 Intake Air Temperature Sensor 2 Circuit Low Bank 1
P0098 Intake Air Temperature Sensor 2 Circuit High Bank 1
P0099 Intake Air Temperature Sensor 2 Circuit Intermittent / Erratic Bank 1

DESCRIPTION

The intake air temperature sensor is built into the air pressure sensor assembly and monitors the intake air temperature. The intake air temperature sensor has a built-in thermistor that varies its resistance depending on the temperature of the intake air. When the air temperature is low, the resistance in the thermistor increases. When the temperature is high, the resistance drops. The variations in resistance are reflected in the voltage applied to the ECM terminal.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0071

Ambient Air Temperature Sensor Circuit "A" Range / Performance

Difference between the readings of ambient temperature and intake air temperature is outside threshold.

  • Air pressure sensor assembly (intake air temperature sensor)

  • Wire harness or connector

  • ECM

Does not come on

DTC stored

P0096

Intake Air Temperature Sensor 2 Circuit Range / Performance Bank 1

Change in intake air temperature sensor signal is outside threshold.

  • Air pressure sensor assembly (intake air temperature sensor)

  • Wire harness or connector

  • ECM

Comes on

DTC stored

P0097

Intake Air Temperature Sensor 2 Circuit Low Bank 1

Short to ground in intake air temperature sensor circuit.

  • Air pressure sensor assembly (intake air temperature sensor)

  • Wire harness or connector

  • ECM

Comes on

DTC stored

P0098

Intake Air Temperature Sensor 2 Circuit High Bank 1

Open or short to +B in intake air temperature sensor circuit.

  • Air pressure sensor assembly (intake air temperature sensor)

  • Wire harness or connector

  • ECM

Comes on

DTC stored

P0099

Intake Air Temperature Sensor 2 Circuit Intermittent / Erratic Bank 1

Intake air temperature signal is outside threshold.

  • Air pressure sensor assembly (intake air temperature sensor)

  • Wire harness or connector

  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

These DTCs are stored when a malfunction is detected in the intake air temperature sensor circuit. If the difference between the intake air temperature and the ambient temperature is outside of the threshold when the ignition switch is turned to ON after a few hours have elapsed since the engine was stopped, or there is an open or short in the intake air temperature sensor circuit, the ECM will store a DTC.

WIRING DIAGRAM

A330210E01

PROCEDURE

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0071, P0096, P0097, P0098 AND/OR P0099)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    5. Check for DTCs.

      Powertrain > Engine > Trouble Codes

      Result

      Result

      Proceed to

      DTC P0071, P0096, P0097, P0098 and/or P0099 is output

      A

      DTC P0071, P0096, P0097, P0098 and/or P0099 and other DTCs are output

      B
      Tip:

      If DTC P0071, P0096, P0097, P0098 and/or P0099 and P0658, P2670 or P2685 are output simultaneously, troubleshoot for DTC P0658, P2670 or P2685 first.

    B

    GO TO DTC CHART

    Click here

    A

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF AIR PRESSURE SENSOR ASSEMBLY)

    A340583C01

    *a

    Front view of wire harness connector

    (to Air Pressure Sensor Assembly)

    1. Disconnect the air pressure sensor assembly connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      B36-2 (VC) - B36-4 (E2)

      Ignition switch ON

      4.5 to 5.5 V

    Result

    Proceed to

    OK

    NG
    NG

    CHECK HARNESS AND CONNECTOR (AIR PRESSURE SENSOR ASSEMBLY - ECM)Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (AIR PRESSURE SENSOR ASSEMBLY - ECM)

    1. Disconnect the air pressure sensor assembly connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B36-3 (THA) - B55-12 (THA)

      Always

      Below 1 Ω

      B36-4 (E2) - B55-24 (E2)

      Always

      Below 1 Ω

      B36-3 (THA) or B55-12 (THA) - Body ground and other terminals

      Always

      10 kΩ or higher

      B36-4 (E2) or B55-24 (E2) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. REPLACE AIR PRESSURE SENSOR ASSEMBLY (INTAKE AIR TEMPERATURE SENSOR)

    1. Replace the air pressure sensor assembly (intake air temperature sensor).

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  5. CHECK WHETHER DTC OUTPUT RECURS (DTC P0071, P0096, P0097, P0098 AND/OR P0099)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs.

      Powertrain > Engine > Clear DTCs

    5. Turn the ignition switch off and wait for a few minutes.

    6. Perform the drive test.

    7. Turn the GTS on.

    8. Enter the following menus: Powertrain / Engine / Trouble Codes.

    9. Check for DTCs.

      Powertrain > Engine > Trouble Codes

    Result

    Result

    Proceed to

    DTC P0071, P0096, P0097, P0098 and/or P0099 is output

    A

    DTCs are not output

    B
    A

    REPLACE ECM

    Click here

    B

    END

  6. CHECK HARNESS AND CONNECTOR (AIR PRESSURE SENSOR ASSEMBLY - ECM)

    1. Disconnect the air pressure sensor assembly connector.

    2. Disconnect the ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      B36-2 (VC) - B55-25 (VCPM)

      Always

      Below 1 Ω

      B36-2 (VC) or B55-25 (VCPM) - Body ground and other terminals

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE ECM

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR