ECD SYSTEM, Diagnostic DTC:P014C and P014D

DTC Code DTC Name
P014C O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1
P014D O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1

DESCRIPTION

Refer to DTC P0030.

Click here

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P014C

O2 Sensor Slow Response - Rich to Lean Bank 1 Sensor 1

The amount of time for the oxygen concentration rate of increase detected by the air fuel ratio sensor (for sensor 1) to reach the specified value is equal to or greater than the standard value.

(3 trip detection logic)

  • Open or short in air fuel ratio sensor (for sensor 1) circuit

  • Air fuel ratio sensor (for sensor 1)

  • Exhaust system exhaust gas leak

Does not come on

DTC stored

P014D

O2 Sensor Slow Response - Lean to Rich Bank 1 Sensor 1

When switching from lean to rich, the difference in switching time between the air fuel ratio sensor (for sensor 1) and air fuel ratio sensor (for sensor 2) is equal to or greater than the standard value.

(3 trip detection logic)

  • Open or short in air fuel ratio sensor (for sensor 1) circuit

  • Air fuel ratio sensor (for sensor 1)

  • Exhaust system exhaust gas leak

Does not come on

DTC stored

Table 1. Related Data List

DTC No.

Data List

P014C

P014D

  • O2 Sensor Lambda Bank 1 Sensor 1

  • O2 Sensor Lambda Bank 1 Sensor 2

WIRING DIAGRAM

Refer to DTC P0030.

Click here

CAUTION / NOTICE / HINT

Note:
  • When replacing the ECM and/or air fuel ratio sensor, the ECM needs registration and initialization.

    Click here

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

Tip:
  • When the ECM must be replaced, before replacing the ECM, perform the "Learning Values Save" function using the GTS. Then after installing the new ECM, perform all of the initialization/registrations 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.

  1. Air fuel ratio sensors functional check

    Refer to DTC P013A.

    Click here

PROCEDURE

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

    1. Disconnect the air fuel ratio sensor (for 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

      B107-1 (AF1+) - B112-127 (AF1+)

      Always

      Below 1 Ω

      B107-2 (AF1-) - B112-126 (AF1-)

      Always

      Below 1 Ω

      B107-3 (HAF1) - B112-46 (HAF1)

      Always

      Below 1 Ω

      B107-5 (TR1) - B112-128 (TR1)

      Always

      Below 1 Ω

      B107-6 (RE1) - B112-125 (RE1)

      Always

      Below 1 Ω

      B107-1 (AF1+) or B112-127 (AF1+) - Body ground

      Always

      10 kΩ or higher

      B107-2 (AF1-) or B112-126 (AF1-) - Body ground

      Always

      10 kΩ or higher

      B107-3 (HAF1) or B112-46 (HAF1) - Body ground

      Always

      10 kΩ or higher

      B107-5 (TR1) or B112-128 (TR1) - Body ground

      Always

      10 kΩ or higher

      B107-6 (RE1) or B112-125 (RE1) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTORClick here

    OK
  2. CHECK EXHAUST SYSTEM

    1. Check for exhaust gas leaks from the installation area of the air fuel ratio sensor (for sensor 1).

      OK

      No exhaust gas leak.

    Result

    Proceed to

    OK

    NG

    NG

    REPAIR OR REPLACE EXHAUST SYSTEMClick here

    OK
  3. CHECK AIR FUEL RATIO SENSOR (FOR SENSOR 1)

    1. Check the air fuel ratio sensor (for sensor 1) for tightness and damages.

      OK

      No damage.

    2. Check for soot deposits in the air fuel ratio sensor (for sensor 1).

      OK

      No soot deposits.

    Result

    Proceed to

    OK

    NG

    NG

    REPAIR OR REPLACE AIR FUEL RATIO SENSOR (FOR SENSOR 1)Click here

    OK
  4. REPLACE AIR FUEL RATIO SENSOR (FOR SENSOR 1)

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

      Click here

    2. Perform the O2 sensor learning value reset.

      Click here

    Result

    Proceed to

    NEXT

    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  5. REPAIR OR REPLACE AIR FUEL RATIO SENSOR (FOR SENSOR 1)

    1. Repair or replace the air fuel ratio sensor (for sensor 1).

      1. Apply compressed air to remove soot stuck to the air fuel ratio sensor. If soot cannot be removed, replace the air fuel ratio sensor.

        Tip:

        When the air fuel ratio sensor is replaced, perform initialization.

        Click here

    Result

    Proceed to

    NEXT

    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  6. REPAIR OR REPLACE EXHAUST SYSTEM

    1. Repair or replace the exhaust system.

      1. Repair the area where leaks were found or replace parts.

    Result

    Proceed to

    NEXT

    NEXT

    CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIREDClick here

  7. REPAIR OR REPLACE HARNESS OR CONNECTOR

    1. Repair or replace the harness or connector.

    Result

    Proceed to

    NEXT

    NEXT
  8. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

    1. Connect the GTS to the DLC3.

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

    3. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs

    4. Turn the ignition switch off and wait for 60 seconds or more [A].

    5. Perform road test [B].

    6. Repeat [A] and [B] for the number of trips detected.

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

      Powertrain > Engine and ECT > Trouble Codes

    8. Confirm that the DTC is not output again.

    Result

    Proceed to

    NEXT

    NEXT

    END