ECD SYSTEM(w/ Glow Plug Controller), Diagnostic DTC:P0131, P0132, P0134, P0137, P0138, P0140

DTC Code DTC Name
P0131 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 1)
P0132 Oxygen Sensor Circuit High Voltage Bank1 Sensor1
P0134 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
P0137 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2)
P0138 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0140 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 2)

DESCRIPTION

Refer to DTC P0031.

Click here

Tech Tips

Although the DTC titles say oxygen sensor, these DTCs relate to the air fuel ratio sensor.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0131 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 1)

Short to ground in air fuel ratio sensor (bank 1 sensor 1) circuit

(2 trip detection logic)

  • Short in air fuel ratio sensor (bank 1 sensor 1) circuit

  • Air fuel ratio sensor (bank 1 sensor 1)

  • ECM

 Comes on DTC stored
P0132 Oxygen Sensor Circuit High Voltage Bank1 Sensor1

Short to +B in air fuel ratio sensor (bank 1 sensor 1) circuit

(2 trip detection logic)

  • Short in air fuel ratio sensor (bank 1 sensor 1) circuit

  • Air fuel ratio sensor (bank 1 sensor 1)

  • ECM

 Comes on DTC stored
P0134 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

Open in air fuel ratio sensor (bank 1 sensor 1) circuit

(2 trip detection logic)

  • Open in air fuel ratio sensor (bank 1 sensor 1) circuit

  • Air fuel ratio sensor (bank 1 sensor 1)

  • ECM

 Comes on DTC stored
P0137 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2)

Short to ground in air fuel ratio sensor (bank 1 sensor 2) circuit

(2 trip detection logic)

  • Short in air fuel ratio sensor (bank 1 sensor 2) circuit

  • Air fuel ratio sensor (bank 1 sensor 2)

  • ECM

 Comes on DTC stored
P0138 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)

Short to +B in air fuel ratio sensor (bank 1 sensor 2) circuit

(2 trip detection logic)

  • Short in air fuel ratio sensor (bank 1 sensor 2) circuit

  • Air fuel ratio sensor (bank 1 sensor 2)

  • ECM

 Comes on DTC stored
P0140 Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 2)

Open in air fuel ratio sensor (bank 1 sensor 2) circuit

(2 trip detection logic)

  • Open in air fuel ratio sensor (bank 1 sensor 2) circuit

  • Air fuel ratio sensor (bank 1 sensor 2)

  • ECM

 Comes on DTC stored
DTC Detection Drive Pattern
DTC No. DTC Detection Drive Pattern
P0131 Vehicle driving with warm engine
P0132
P0134
P0137
P0138
P0140

WIRING DIAGRAM

Refer to DTC P0031.

Click here

CAUTION / NOTICE / HINT

Note


  • When replacing the ECM and/or air fuel ratio sensor, perform ECM Initialization and Registration.

    Click here

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

Tech Tips


  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing a new ECM, perform all of the initialization and registration procedures for the "Learning Values Write" function by following the instructions shown on the GTS display.

  • 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, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0131, P0132, P0134, P0137, P0138 OR P0140)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON and turn the GTS on.

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

    4. Read the DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      DTC P0131, P0132, P0134, P0137, P0138 or P0140 is output A
      DTC P0131, P0132, P0134, P0137, P0138 or P0140 and other DTCs are output B

      Tech Tips

      If any DTCs other than P0131, P0132, P0134, P0137, P0138 or P0140 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. PERFORM SIMULATION TEST


    1. Interchange the connectors of air fuel ratio sensor (bank 1 sensor 1) and air fuel ratio sensor (bank 1 sensor 2) and connect them.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    5. Start the engine and allow it to idle until the engine coolant temperature reaches at 70°C (158°F) or higher.

    6. Drive the vehicle with a stop-and-go city drive pattern for more than 15 minutes.

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

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

    8. Read the pending DTCs.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Result Proceed to
      Output DTC changed from DTC P0131, P0132 or P0134 to P0137, P0138 or P0140 A
      Output DTC changed from P0137, P0138 or P0140 to P0131, P0132 or P0134 B
      Output DTC does not change from P0131, P0132 or P0134 to P0137, P0138 or P0140 C
      Output DTC does not change from P0137, P0138 or P0140 to P0131, P0132 or P0134 D

      Tech Tips

      Other DTCs may be output depending on driving conditions, but check whether the air fuel ratio sensor DTC has changed.


    B

    REPLACE AIR FUEL RATIO SENSOR (BANK 1 SENSOR 2) Click here

    C

    CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR (BANK 1 SENSOR 1) - ECM) Click here

    D

    CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR (BANK 1 SENSOR 2) - ECM) Click here

    A

  3. REPLACE AIR FUEL RATIO SENSOR (BANK 1 SENSOR 1)


    1. Replace the air fuel ratio sensor (bank 1 sensor 1).

      Click here

    2. Perform A/F Sensor Compensation Reset.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  4. REPLACE AIR FUEL RATIO SENSOR (BANK 1 SENSOR 2)


    1. Replace the air fuel ratio sensor (bank 1 sensor 2).

      Click here

    2. Perform A/F Sensor Compensation Reset.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  5. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR (BANK 1 SENSOR 1) - ECM)


    1. Disconnect the air fuel ratio sensor (bank 1 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
      B120-4 (AF1+) - B212-127 (AF1+) Always Below 1 Ω
      B120-1 (AF1-) - B212-129 (AF1-) Always Below 1 Ω
      B120-3 (RE1) - B212-128 (RE1) Always Below 1 Ω
      B120-5 (HAF1) - B212-46 (HAF1) Always Below 1 Ω
      B120-4 (AF1+) or B212-127 (AF1+) - Body ground and other terminals Always 10 kΩ or higher
      B120-1 (AF1-) or B212-129 (AF1-) - Body ground and other terminals Always 10 kΩ or higher
      B120-3 (RE1) or B212-128 (RE1) - Body ground and other terminals Always 10 kΩ or higher
      B120-5 (HAF1) or B212-46 (HAF1) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  6. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

    GO TO STEP 11 Click here

  8. CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR (BANK 1 SENSOR 2) - ECM)


    1. Disconnect the air fuel ratio sensor (bank 1 sensor 2) 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
      B188-4 (AF2+) - B212-109 (AF2+) Always Below 1 Ω
      B188-1 (AF2-) - B212-77 (AF2-) Always Below 1 Ω
      B188-3 (RE2) - B212-76 (RE2) Always Below 1 Ω
      B188-5 (HAF2) - B212-16 (HAF2) Always Below 1 Ω
      B188-4 (AF2+) or B212-109 (AF2+) - Body ground and other terminals Always 10 kΩ or higher
      B188-1 (AF2-) or B212-77 (AF2-) - Body ground and other terminals Always 10 kΩ or higher
      B188-3 (RE2) or B212-76 (RE2) - Body ground and other terminals Always 10 kΩ or higher
      B188-5 (HAF2) or B212-16 (HAF2) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR Click here

    OK

  9. REPLACE ECM


    1. Replace the ECM.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

    GO TO STEP 11 Click here

  10. REPAIR OR REPLACE HARNESS OR CONNECTOR

    Result
    Proceed to
    NEXT

    NEXT

  11. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Check that the connectors that were interchanged during the simulation test in step 2 have been returned to their original conditions.

    2. Connect the GTS to the DLC3.

    3. Turn the ignition switch to ON and turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine and ECT > Clear DTCs

    5. Start the engine and allow it to idle until the engine coolant temperature reaches at 70°C (158°F) or higher.

    6. Drive the vehicle with a stop-and-go city drive pattern for more than 15 minutes.

      CAUTION:

      When performing the confirmation driving pattern, obey all speed limits and traffic laws.

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

    8. Confirm that the pending DTC is not output again.


      Powertrain > Engine and ECT > Trouble Codes
      Result
      Proceed to
      NEXT

    NEXT

    END