SFI SYSTEM, Diagnostic DTC:P0135

DTC Code DTC Name
P0135 Oxygen (A/F) Sensor Heater Circuit (Bank 1 Sensor 1)

DESCRIPTION

Refer to DTC P0130.

Click here

Tip:

The ECM provides a pulse width modulated control circuit to adjust current through the heater. The heated oxygen sensor heater circuit uses a relay on the +B side of the circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0135

Oxygen (A/F) Sensor Heater Circuit (Bank 1 Sensor 1)

Open or short of heated oxygen sensor (sensor 1) heater or related circuit (3 trip detection logic).

  • Open or short in heated oxygen sensor (sensor 1) heater circuit

  • Heated oxygen sensor (sensor 1)

  • Driver side junction block assembly

  • ECM

Comes on

DTC stored

WIRING DIAGRAM

Refer to DTC P0130.

Click here

CONFIRMATION DRIVING PATTERN

DTC P0135 is detected when the engine idles for 20 minutes.

CAUTION / NOTICE / HINT

Note:

  • After replacing the ECM, perform idle learning.

    Click here

  • Inspect the fuses for circuits related to this system before performing the following procedure.

Tip:

  • Sensor 1 refers to the sensor closest to the engine assembly.

  • Sensor 2 refers to the sensor farthest away from the engine assembly.

  • Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE

  1. INSPECT HEATED OXYGEN SENSOR (SENSOR 1) (HEATER RESISTANCE)

    1. Inspect the heated oxygen sensor (sensor 1).

      Click here

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE HEATED OXYGEN SENSOR (SENSOR 1)

    Click here

    OK

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF HEATED OXYGEN SENSOR (SENSOR 1))

    A319419C02

    *a

    Front view of wire harness connector

    (to Heated Oxygen Sensor (Sensor 1))

    1. Disconnect the heated oxygen sensor (sensor 1) 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

      B4-1 (+B) - Body ground

      Ignition switch ON

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    NG

    INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY (EFI-MAIN RELAY)Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (HEATED OXYGEN SENSOR (SENSOR 1) - ECM)

    1. Disconnect the heated oxygen sensor (sensor 1) 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

      B4-2 (HT1A) - B31-24 (HT1A)

      Always

      Below 1 Ω

      B4-2 (HT1A) or B31-24 (HT1A) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P0135)

    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 and ECT > Clear DTCs

    5. Turn the ignition switch off and wait for at least 30 seconds.

    6. Start the engine.

    7. Allow the engine to idle for 20 minutes or more.

    8. Turn the GTS on.

    9. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    10. Read the pending DTCs.

      Powertrain > Engine and ECT > Trouble Codes

      Result

      Result

      Proceed to

      DTCs are not output

      A

      DTC P0135 is output

      B
    A

    CHECK FOR INTERMITTENT PROBLEMS

    Click here

    B

    REPLACE ECM

    Click here

  5. INSPECT DRIVER SIDE JUNCTION BLOCK ASSEMBLY (EFI-MAIN RELAY)

    1. Remove the driver side junction block assembly.

      Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3B-1 - 3K-5

      Battery voltage applied between terminals 3D-14 and 3J-7

      Below 1 Ω

      Battery voltage not applied between terminals 3D-14 and 3J-7

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE DRIVER SIDE JUNCTION BLOCK ASSEMBLY

    Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK ASSEMBLY - HEATED OXYGEN SENSOR (SENSOR 1))

    1. Disconnect the driver side junction block assembly connector.

    2. Disconnect the heated oxygen sensor (sensor 1) connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3K-5 - B4-1 (+B)

      Always

      Below 1 Ω

      3K-5 or B4-1 (+B) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    CHECK ECM POWER SOURCE CIRCUIT

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR