SFI SYSTEM(w/ Canister Pump Module), Diagnostic DTC:P0136, P0137, P0138, P0139, P013A, P013C, P0156, P0157, P0158, P0159

DTC Code DTC Name
P0136 Oxygen Sensor Circuit (Bank 1 Sensor 2)
P0137 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 2)
P0138 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)
P0139 Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2)
P013A Oxygen Sensor Slow Response - Rich to Lean Bank 1 Sensor 2
P013C Oxygen Sensor Slow Response - Rich to Lean Bank 2 Sensor 2
P0156 Oxygen Sensor Circuit (Bank 2 Sensor 2)
P0157 Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2)
P0158 Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2)
P0159 Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2)

DESCRIPTION

In order to obtain a high purification rate of the carbon monoxide (CO), hydrocarbon (HC) and nitrogen oxide (NOx) components in the exhaust gas, a TWC (Three-Way Catalytic Converter) is used. For the most efficient use of the TWC, the air fuel ratio must be precisely controlled so that it is always close to the stoichiometric air fuel level. For the purpose of helping the ECM to deliver accurate air fuel ratio control, a heated oxygen sensor is used.

The heated oxygen sensor is located behind the TWC, and detects the oxygen concentration in the exhaust gas. Since the sensor is integrated with the heater that heats the sensing portion, it is possible to detect the oxygen concentration even when the intake air volume is low (the exhaust gas temperature is low).

When the air fuel ratio becomes lean, the oxygen concentration in the exhaust gas is high. The heated oxygen sensor informs the ECM that the post-TWC air fuel ratio is lean (low voltage, i.e. less than 0.45 V).

Conversely, when the air fuel ratio is richer than the stoichiometric air fuel level, the oxygen concentration in the exhaust gas is low. The heated oxygen sensor informs the ECM that the post-TWC air fuel ratio is rich (high voltage, i.e. higher than 0.45 V). The heated oxygen sensor has the property of changing its output voltage drastically when the air fuel ratio is close to the stoichiometric level.

The ECM uses the supplementary information from the heated oxygen sensor to determine whether the air fuel ratio after the TWC is rich or lean, and adjusts the fuel injection duration accordingly. Thus, if the heated oxygen sensor is working improperly due to internal malfunctions, the ECM is unable to compensate for deviations in the primary air fuel ratio control.

B000U9YE10
DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory
P0136 Oxygen Sensor Circuit (Bank 1 Sensor 2)

Either of the following conditions is met:


  • Abnormal voltage output:


    • During active air fuel ratio control, heated oxygen sensor voltage does not increase to 0.66 V or higher for certain period of time (2 trip detection logic).

  • Low impedance:


    • Sensor impedance less than 5 Ω for 30 seconds or more when ECM presumes sensor is warmed up and operating normally (2 trip detection logic).

  • Heated oxygen sensor (bank 1 sensor 2) circuit

  • Heated oxygen sensor (bank 1 sensor 2)

  • Air fuel ratio sensor (bank 1 sensor 1)

  • Gas leak from exhaust system

  • Fuel pressure

  • Fuel system

  • PCV valve and hose

  • Intake system

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

Either of the following conditions is met:


  • Low voltage (open):


    • During active air fuel ratio control, following conditions (a) and (b) met for certain period of time (2 trip detection logic):

    • (a) Heated oxygen sensor voltage output less than 0.21 V

    • (b) Target air fuel ratio rich

  • High impedance:


    • Sensor impedance 15 kΩ or higher for 90 seconds or more when ECM presumes sensor to be warmed up and operating normally (2 trip detection logic).

  • Heated oxygen sensor (bank 1 sensor 2) circuit

  • Heated oxygen sensor (bank 1 sensor 2)

  • Air fuel ratio sensor (bank 1 sensor 1)

  • Gas leak from exhaust system

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

  • Extremely high voltage (short):


    • Heated oxygen sensor voltage output exceeds 1.2 V for 10 seconds or more (2 trip detection logic).

  • Heated oxygen sensor (bank 1 sensor 2) circuit

  • Heated oxygen sensor (bank 1 sensor 2)

  • ECM

 Comes on DTC stored
P0139 Oxygen Sensor Circuit Slow Response (Bank 1 Sensor 2) Heated oxygen sensor (bank 1 sensor 2) voltage does not drop to less than 0.2 V immediately after fuel cut starts (2 trip detection logic).

  • Heated oxygen sensor (bank 1 sensor 2) circuit

  • Heated oxygen sensor (bank 1 sensor 2)

  • Gas leak from exhaust system

 Comes on DTC stored
P013A Oxygen Sensor Slow Response - Rich to Lean Bank 1 Sensor 2 Heated oxygen sensor (bank 1 sensor 2) voltage does not drop from 0.35 V to 0.2 V immediately after fuel cut status (1 trip detection logic).

  • Heated oxygen sensor (bank 1 sensor 2) circuit

  • Heated oxygen sensor (bank 1 sensor 2)

  • Gas leak from exhaust system

 Comes on DTC stored
P013C Oxygen Sensor Slow Response - Rich to Lean Bank 2 Sensor 2 Heated oxygen sensor (bank 2 sensor 2) voltage does not drop from 0.35 V to 0.2 V immediately after fuel cut status (1 trip detection logic).

  • Heated oxygen sensor (bank 2 sensor 2) circuit

  • Heated oxygen sensor (bank 2 sensor 2)

  • Gas leak from exhaust system

 Comes on DTC stored
P0156 Oxygen Sensor Circuit (Bank 2 Sensor 2)

Either of the following conditions is met:


  • Abnormal voltage output:


    • During active air fuel ratio control, heated oxygen sensor voltage does not increase to 0.66 V or higher for certain period of time (2 trip detection logic).

  • Low impedance:


    • Sensor impedance less than 5 Ω for 30 seconds or more when ECM presumes sensor is warmed up and operating normally (2 trip detection logic).

  • Heated oxygen sensor (bank 2 sensor 2) circuit

  • Heated oxygen sensor (bank 2 sensor 2)

  • Air fuel ratio sensor (bank 2 sensor 1)

  • Gas leak from exhaust system

  • Fuel pressure

  • Fuel system

  • PCV valve and hose

  • Intake system

 Comes on DTC stored
P0157 Oxygen Sensor Circuit Low Voltage (Bank 2 Sensor 2)

Either of the following conditions is met:


  • Low voltage (open):


    • During active air fuel ratio control, following conditions (a) and (b) met for certain period of time (2 trip detection logic):

    • (a) Heated oxygen sensor voltage output less than 0.21 V

    • (b) Target air fuel ratio rich

  • High impedance:


    • Sensor impedance 15 kΩ or higher for 90 seconds or more when ECM presumes sensor to be warmed up and operating normally (2 trip detection logic).

  • Heated oxygen sensor (bank 2 sensor 2) circuit

  • Heated oxygen sensor (bank 2 sensor 2)

  • Air fuel ratio sensor (bank 2 sensor 1)

  • Gas leak from exhaust system

 Comes on DTC stored
P0158 Oxygen Sensor Circuit High Voltage (Bank 2 Sensor 2)

  • Extremely high voltage (short):


    • Heated oxygen sensor voltage output exceeds 1.2 V for 10 seconds or more (2 trip detection logic).

  • Heated oxygen sensor (bank 2 sensor 2) circuit

  • Heated oxygen sensor (bank 2 sensor 2)

  • ECM

 Comes on DTC stored
P0159 Oxygen Sensor Circuit Slow Response (Bank 2 Sensor 2) Heated oxygen sensor (bank 2 sensor 2) voltage does not drop to less than 0.2 V immediately after fuel cut starts (2 trip detection logic).

  • Heated oxygen sensor (bank 2 sensor 2) circuit

  • Heated oxygen sensor (bank 2 sensor 2)

  • Gas leak from exhaust system

 Comes on DTC stored

MONITOR DESCRIPTION


  1. Active Air Fuel Ratio Control

    The ECM usually performs air fuel ratio feedback control so that the air fuel ratio sensor output indicates a near stoichiometric air fuel level. This vehicle includes active air fuel ratio control in addition to regular air fuel ratio control. The ECM performs active air fuel ratio control to detect any deterioration in the Three-Way Catalytic Converter (TWC) and heated oxygen sensor malfunctions (refer to the diagram below).

    Active air fuel ratio control is performed for approximately 15 to 20 seconds while driving with a warm engine. During active air fuel ratio control, the air fuel ratio is forcibly regulated to become lean or rich by the ECM. If the ECM detects a malfunction, a DTC is stored.

  2. Abnormal Voltage Output of Heated Oxygen Sensor (DTCs P0136 and P0156)

    While the ECM is performing active air fuel ratio control, the air fuel ratio is forcibly regulated to become rich or lean. If the sensor is not functioning properly, the voltage output variation is small. For example, when the heated oxygen sensor voltage does not increase to 0.66 V or higher during active air fuel ratio control, the ECM determines that the sensor voltage output is abnormal and stores DTC P0136 or P0156.

    B000WORE01

  3. Open in Heated Oxygen Sensor Circuit (DTCs P0137 and P0157)

    During active air fuel ratio control, the ECM calculates the Oxygen Storage Capacity (OSC)* of the Three-Way Catalytic Converter (TWC) by forcibly regulating the air fuel ratio to become rich or lean.

    If the heated oxygen sensor has an open circuit, or the voltage output of the sensor noticeably decreases, the OSC indicates an extraordinarily high value. Even if the ECM attempts to continue regulating the air fuel ratio to become rich or lean, the heated oxygen sensor output does not change.

    While performing active air fuel ratio control, when the target air fuel ratio is rich and the heated oxygen sensor voltage output is less than 0.21 V (lean), the ECM interprets this as an abnormally low sensor output voltage and stores DTC P0137 or P0157.

    Tech Tips

    *: The TWC has the capability to store oxygen. The OSC and the emission purification capacity of the TWC are mutually related. The ECM determines whether the catalyst has deteriorated, based on the calculated OSC value.

    Click here

    B000WRHE54

  4. High or Low Impedance of Heated Oxygen Sensor (DTCs P0136 and P0156 or P0137 and P0157)

    B000U82E04
    Relationship between element temperature and impedance
    *a DTC Detection Area

    During normal air fuel ratio feedback control, there are small variations in the exhaust gas oxygen concentration. In order to continuously monitor the slight variation of the heated oxygen sensor signal while the engine is running, the impedance* of the sensor is measured by the ECM. The ECM determines that there is a malfunction in the sensor when the measured impedance deviates from the standard range.

    *: The effective resistance in an alternating current electrical circuit.

    Tech Tips


    • The impedance cannot be measured using an ohmmeter.

    • DTC P0136 or P0156 indicates the deterioration of the heated oxygen sensor. The ECM stores the DTC by calculating the impedance of the sensor when the typical enabling conditions are satisfied (2 driving cycles).

    • DTC P0137 or P0157 indicates an open or short circuit in the heated oxygen sensor (2 driving cycles). The ECM stores the DTC when the impedance of the sensor exceeds the threshold 15 kΩ.

  5. Extremely High Output Voltage of Heated Oxygen Sensor (DTCs P0138 and P0158)

    The ECM continuously monitors the heated oxygen sensor output voltage while the engine is running.

    DTC P0138 or P0158 is stored if the heated oxygen sensor voltage output is 1.2 V or higher for 10 seconds or more.

  6. Abnormal Voltage Output of Heated Oxygen Sensor During Fuel-cut (DTCs P0139 and P0159)

    The sensor output voltage drops to less than 0.2 V (extremely lean status) immediately when the vehicle decelerates and fuel cut is operating. If the voltage does not drop to less than 0.2 V when accumulated intake air mass is more than 15.5 g, the system determines that the sensor response has deteriorated, illuminates the MIL and stores a DTC.

  7. Abnormal Voltage Output of Heated Oxygen Sensor During Fuel-cut from Rich Condition (DTCs P013A and P013C)

    If the sensor output voltage does not drop from 0.35 to 0.2 V immediately when the vehicle decelerates and fuel cut is operating, the ECM illuminates the MIL and stores a DTC.

MONITOR STRATEGY

Required Sensors/Components (Main) Heated oxygen sensor (sensor 2)
Required Sensors/Components (Related)

Crankshaft position sensor

Engine coolant temperature sensor

Mass air flow meter sub-assembly

Throttle position sensor

Air fuel ratio sensor
Frequency of Operation

Once per driving cycle: Active air fuel ratio control detection, heated oxygen sensor abnormal voltage during fuel cut.

Continuous: Other

TYPICAL ENABLING CONDITIONS

P0136, P0137, P0156 and P0157: Heated Oxygen Sensor Voltage Check (Voltage Malfunction and Low Voltage)
Battery voltage 11 V or higher
Intake air temperature -10°C (14°F) or higher
Engine coolant temperature 75°C (167°F) or higher
Atmospheric pressure 76 kPa(abs) [570 mmHg(abs)] or higher
Idling Off
Engine speed Less than 3200 rpm
Air fuel ratio sensor status Activated
Fuel system status Closed loop
Engine load 10% or higher, and less than 70%
Shift position 4th or higher
P0136 and P0156: Heated Oxygen Sensor Circuit Continuity Check (Circuit Short)
Battery voltage 11 V or higher
Estimated heated oxygen sensor temperature Less than 700°C (1292°F)
P0137 and P0157: Heated Oxygen Sensor Circuit Continuity Check (Circuit Open)
Battery voltage 11 V or higher
Estimated heated oxygen sensor temperature 450°C (842°F) or higher, and less than 750°C (1382°F)
P0138 and P0158: Heated Oxygen Sensor Circuit Continuity Check (Out of Range)
Battery voltage 11 V or higher
Time after engine start 2 seconds or more
P0139 and P0159: Heated Oxygen Sensor Response Rate During Fuel Cut
Engine coolant temperature 75°C (167°F) or higher
Estimated catalyst temperature 580°C (1076°F) or higher
Fuel cut On
P013A and P013C: Heated Oxygen Sensor Response Rate During Fuel Cut from Rich Condition
Battery voltage 11 V or higher
Engine coolant temperature 75°C (167°F) or higher
Estimated catalyst temperature 580°C (1076°F) or higher
Fuel cut On

TYPICAL MALFUNCTION THRESHOLDS

P0136 and P0156: Heated Oxygen Sensor Voltage Check (Voltage Malfunction)
All of the following conditions are met (a), (b) and (c)
(a) OSC (Oxygen Storage Capacity) of catalyst 2.5 g or more
(b) Commanded air fuel ratio 14.3 or less
(c) Heated oxygen sensor voltage 0.21 V or higher, and less than 0.66 V
P0137 and P0157: Heated Oxygen Sensor Voltage Check (Low Voltage)
All of the following conditions are met (a), (b) and (c)
(a) OSC (Oxygen Storage Capacity) of catalyst 2.5 g or more
(b) Commanded air fuel ratio 14.3 or less
(c) Heated oxygen sensor voltage Less than 0.21 V
P0136 and P0156: Heated Oxygen Sensor Circuit Continuity Check (Circuit Short)
Duration of following condition 30 seconds or more
Heated oxygen sensor impedance Less than 5 Ω
P0137 and P0157: Heated Oxygen Sensor Circuit Continuity Check (Circuit Open)
Duration of following condition 90 seconds or more
Heated oxygen sensor impedance 15 kΩ or higher
P0138 and P0158: Heated Oxygen Sensor Circuit Continuity Check (Out of Range)
Duration of following condition 10 seconds or more
Heated oxygen sensor voltage 1.2 V or higher
P0139 and P0159: Heated Oxygen Sensor Response Rate During Fuel Cut
Total airflow volume reached after start of fuel-cut while heated oxygen sensor voltage remains at 0.2 V or higher More than 15.5 g
P013A and P013C: Heated Oxygen Sensor Response Rate During Fuel Cut from Rich Condition
Duration until heated oxygen sensor voltage drops from 0.35 V to 0.2 V during fuel cut (Normalized) 1 second or more

CONFIRMATION DRIVING PATTERN

Tech Tips


  • This confirmation driving pattern is used in the "Perform Confirmation Driving Pattern" procedure of the following diagnostic troubleshooting procedure.

  • Performing this confirmation driving pattern will activate the heated oxygen sensor monitor (The catalyst monitor is performed simultaneously). This is very useful for verifying the completion of a repair.


B000WXSE01

  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the GTS on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

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

  6. Turn the engine switch on (IG).

  7. Turn the GTS on [A].

  8. Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].

  9. With the shift state in drive (D), drive the vehicle at 60 to 120 km/h (37 to 75 mph) for 10 minutes or more [C].

    CAUTION:

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

  10. Enter the following menus: Powertrain / Engine / Trouble Codes [D].

  11. Read the pending DTCs.

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  12. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  13. Input the DTC: P0136, P0137, P0138, P0156, P0157 or P0158.

  14. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, perform steps [C] and [D] again.


B000ZDJE22

  1. Connect the GTS to the DLC3.

  2. Turn the engine switch on (IG).

  3. Turn the GTS on.

  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

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

  6. Turn the engine switch on (IG).

  7. Turn the GTS on.

  8. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with park (P) selected [A].

    Tech Tips

    In order to keep the idling stable, turn off the A/C and all other electric loads and do not perform any shift operations.

  9. Drive the vehicle at approximately 60 km/h (37 mph) for 10 minutes or more [B].

    CAUTION:

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

    Tech Tips

    Drive the vehicle while keeping the engine load as constant as possible.

  10. With the shift state M, drive the vehicle at 60 km/h (37 mph), and then decelerate the vehicle by releasing the accelerator pedal for 5 seconds or more to perform the fuel-cut [C].

    CAUTION:

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

  11. Repeat step [C] 2 times or more in one driving cycle.

  12. Enter the following menus: Powertrain / Engine / Trouble Codes / Pending.

  13. Read the pending DTCs [D].

    Tech Tips


    • If a pending DTC is output, the system is malfunctioning.

    • If a pending DTC is not output, perform the following procedure.

  14. Enter the following menus: Powertrain / Engine / Utility / All Readiness.

  15. Input the DTC: P0139, P013A, P013C or P0159.

  16. Check the DTC judgment result.

    GTS Display Description
    NORMAL

    • DTC judgment completed

    • System normal
    ABNORMAL

    • DTC judgment completed

    • System abnormal
    INCOMPLETE

    • DTC judgment not completed

    • Perform driving pattern after confirming DTC enabling conditions
    N/A

    • Unable to perform DTC judgment

    • Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit

    Tech Tips


    • If the judgment result shows NORMAL, the system is normal.

    • If the judgment result shows ABNORMAL, the system has a malfunction.

    • If the judgment result shows INCOMPLETE or N/A, drive the vehicle with the shift state in M, and then perform step [C] again.

WIRING DIAGRAM

B000XLEE01

CAUTION / NOTICE / HINT

Tech Tips

Malfunctioning areas can be identified by performing the Control the Injection Volume for A/F Sensor function provided in the Active Test. The Control the Injection Volume for A/F Sensor function can help to determine whether the air fuel ratio sensor, heated oxygen sensor and other potential trouble areas are malfunctioning.

The following instructions describe how to conduct the Control the Injection Volume for A/F Sensor operation using the GTS.


  1. Connect the GTS to the DLC3.

  2. Start the engine.

  3. Turn the GTS on.

  4. Warm up the engine at an engine speed of 2500 rpm for approximately 90 seconds.

  5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Ptrl AF Control / AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2.

  6. Perform the Active Test operation with the engine idling (press the RIGHT or LEFT button to change the fuel injection volume).

  7. Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2) displayed on the GTS.

Tech Tips


  • The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 12.5%.

  • Each sensor reacts in accordance with increases and decreases in the fuel injection volume.

GTS Display

(Sensor)

 Injection Volume Status Voltage

AFS Voltage B1S1

AFS Voltage B2S1

(Air fuel ratio)

 12.5% Rich Below 3.1 V
-12.5% Lean Higher than 3.4 V

O2S B1S2

O2S B2S2

(Heated oxygen)

 12.5% Rich Higher than 0.55 V
-12.5% Lean Below 0.4 V

Note

The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.

B000TTWE44

Note

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

Tech Tips


  • Bank 1 refers to the bank that includes the No. 1 cylinder*.

    *: The No. 1 cylinder is the cylinder which is farthest from the transmission.

  • Bank 2 refers to the bank that does not include the No. 1 cylinder.

  • 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. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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. READ OUTPUT DTC (DTC P0136, P0137, P0138, P0139, P013A, P013C, P0156, P0157, P0158 AND P0159)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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


      Powertrain > Engine > Trouble Codes

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P0138 and/or P0158 is output A
      DTC P0137 and/or P0157 is output B
      DTC P0136 and/or P0156 is output C
      DTC P0139, P013A, P013C and/or P0159 is output D
      DTC P0136, P0137, P0138, P0156, P0157 and/or P0158 and other DTCs are output E

      Tech Tips

      If any DTCs other than P0136, P0137, P0138, P0139, P013A, P013C, P0156, P0157, P0158 or P0159 are output, troubleshoot those DTCs first.


    B

    GO TO STEP 9 Click here

    C

    PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME FOR A/F SENSOR) Click here

    D

    CHECK FOR EXHAUST GAS LEAK Click here

    E

    GO TO DTC CHART Click here

    A

  2. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT)

    B000V3GC01
    *a

    Component without harness connected

    (Heated Oxygen Sensor)
    *b Bank 1
    *c Bank 2

    1. Disconnect the heated oxygen sensor connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 (+B) - 4 (E2) Always 10 kΩ or higher
      2 (+B) - 3 (OX1B) Always 10 kΩ or higher
      2 (+B) - 4 (E2) Always 10 kΩ or higher
      2 (+B) - 3 (OX2B) Always 10 kΩ or higher

      Tech Tips

      Perform "Inspection After Repair" after replacing the heated oxygen sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEATED OXYGEN SENSOR Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT)


    1. Turn the engine switch off and wait for 5 minutes or more.

    2. Disconnect the ECM connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G42-17 (HT1B) - G42-93 (OX1B) Always 10 kΩ or higher
      G42-16 (HT2B) - G42-91 (OX2B) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Warm up the engine.

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Ptrl AF Control / O2S B1S2 or O2S B2S2.


      Powertrain > Engine > Active Test
      Active Test Display
      Control the Injection Volume for A/F Sensor
      Data List Display
      O2S B1S2
      O2S B2S2

    6. Change the fuel injection volume using the GTS, and monitor the voltage output of the heated oxygen sensor displayed on the GTS.

      Tech Tips


      • The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 12.5%.

      • The heated oxygen sensor has a maximum output delay of approximately 20 seconds.

      Standard Voltage
      Fluctuates between 0.4 V or less, and 0.55 V or higher.
      Result
      Proceed to
      OK
      NG

    NG

    CHECK FOR EXHAUST GAS LEAK Click here

    OK

  5. PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Warm up the engine.

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Ptrl AF Control / AFS Voltage B1S1 and O2S B1S2 or AFS Voltage B2S1 and O2S B2S2.


      Powertrain > Engine > Active Test
      Active Test Display
      Control the Injection Volume for A/F Sensor
      Data List Display
      AFS Voltage B1S1
      AFS Voltage B2S1
      O2S B1S2
      O2S B2S2

    6. Change the fuel injection volume using the GTS, and monitor the voltage output of the air fuel ratio and heated oxygen sensors displayed on the GTS.

      Tech Tips


      • The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 12.5%.

      • The air fuel ratio sensor is displayed as AFS Voltage B1S1 or AFS Voltage B2S1, and the heated oxygen sensor is displayed as O2S B1S2 or O2S B2S2 on the GTS.

      • The air fuel ratio sensor has an output delay of a few seconds and the heated oxygen sensor has a maximum output delay of approximately 20 seconds.

      • If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.

      Result
      GTS Display (Sensor) Voltage Variation Proceed to

      AFS Voltage B1S1

      AFS Voltage B2S1

      (Air fuel ratio)

      		 Alternates between higher and less than 3.3 V OK
      Remains at higher than 3.3 V NG
      Remains at less than 3.3 V

      Tech Tips

      A normal heated oxygen sensor voltage (O2S B1S2 or O2S B2S2) reacts in accordance with increases and decreases in fuel injection volumes. When the air fuel ratio sensor voltage (AFS Voltage B1S1 or AFS Voltage B2S1) remains at either less or higher than 3.3 V despite the heated oxygen sensor indicating a normal reaction, the air fuel ratio sensor is malfunctioning.

      B000Y2YE05

    OK

    CHECK ENGINE TO DETERMINE CAUSE OF EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO (FUEL INJECTOR ASSEMBLY, FUEL SYSTEM, INTAKE SYSTEM, ETC.) Click here

    NG

  6. REPLACE AIR FUEL RATIO SENSOR


    1. Replace the air fuel ratio sensor.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the air fuel ratio sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. PERFORM CONFIRMATION DRIVING PATTERN


    1. Perform the Confirmation Driving Pattern (P0136, P0137, P0138, P0156, P0157 and P0158).

      Result
      Proceed to
      NEXT

    NEXT

  8. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136 AND P0156)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Utility / All Readiness.


      Powertrain > Engine > Utility
      Tester Display
      All Readiness

    5. Input the DTC: P0136 or P0156.

    6. Check that the DTC monitor is NORMAL. If the DTC monitor is INCOMPLETE, perform the drive pattern again but increase the vehicle speed.

      Result
      Result Proceed to

      NORMAL

      (DTCs are not output)

      		 A

      ABNORMAL

      (DTC P0136 and/or P0156 is output)

      		 B

      Tech Tips

      Perform "Inspection After Repair" after replacing the heated oxygen sensor.

      Click here


    A

    END

    B

    REPLACE HEATED OXYGEN SENSOR Click here

  9. CHECK FOR EXHAUST GAS LEAK


    1. Check for exhaust gas leaks.

      OK
      No gas leaks.

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the exhaust system.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE EXHAUST GAS LEAK POINT

    OK

  10. INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE)

    Result
    Proceed to
    OK
    NG

    1. Inspect the heated oxygen sensor.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the heated oxygen sensor.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE HEATED OXYGEN SENSOR Click here

    OK

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


    1. Disconnect the heated oxygen sensor connector.

    2. Disconnect the ECM connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      X34-1 (HT1B) - G42-17 (HT1B) Always Below 1 Ω
      X34-3 (OX1B) - G42-93 (OX1B) Always Below 1 Ω
      X34-4 (E2) - G42-94 (EX1B) Always Below 1 Ω
      X33-1 (HT2B) - G42-16 (HT2B) Always Below 1 Ω
      X33-3 (OX2B) - G42-91 (OX2B) Always Below 1 Ω
      X33-4 (E2) - G42-92 (EX2B) Always Below 1 Ω
      X34-1 (HT1B) or G42-17 (HT1B) - Body ground and other terminals Always 10 kΩ or higher
      X34-3 (OX1B) or G42-93 (OX1B) - Body ground and other terminals Always 10 kΩ or higher
      X33-1 (HT2B) or G42-16 (HT2B) - Body ground and other terminals Always 10 kΩ or higher
      X33-3 (OX2B) or G42-91 (OX2B) - Body ground and other terminals Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. REPLACE HEATED OXYGEN SENSOR


    1. Replace the heated oxygen sensor.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the heated oxygen sensor.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  13. PERFORM CONFIRMATION DRIVING PATTERN


    1. Perform the Confirmation Driving Pattern (P0136, P0137, P0138, P0156, P0157 and P0158).

      Result
      Proceed to
      NEXT

    NEXT

  14. CHECK WHETHER DTC OUTPUT RECURS (DTC P0136, P0137, P0156 AND P0157)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Utility / All Readiness.


      Powertrain > Engine > Utility
      Tester Display
      All Readiness

    5. Input the DTC: P0136, P0137, P0156 and/or P0157.

    6. Check that the DTC monitor is NORMAL. If the DTC monitor is INCOMPLETE, perform the drive pattern again but increase the vehicle speed.

      Result
      Result Proceed to

      ABNORMAL

      (DTC P0136, P0137, P0156 and/or P0157 is output)

      		 A

      NORMAL

      (DTCs are not output)

      		 B

      Tech Tips

      Perform "Inspection After Repair" after replacing the air fuel ratio sensor.

      Click here


    A

    REPLACE AIR FUEL RATIO SENSOR Click here

    B

    END

  15. CHECK FOR EXHAUST GAS LEAK


    1. Check for exhaust gas leaks.

      OK
      No gas leaks.

      Tech Tips

      Perform "Inspection After Repair" after repairing or replacing the exhaust system.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE EXHAUST GAS LEAK POINT

    OK

  16. INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT)


    1. Turn the engine switch off and wait for 5 minutes or more.

    2. Disconnect the ECM connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G42-17 (HT1B) - G42-93 (OX1B) Always 10 kΩ or higher
      G42-16 (HT2B) - G42-91 (OX2B) Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  17. PERFORM CONFIRMATION DRIVING PATTERN


    1. Perform the Confirmation Driving Pattern (P0139, P013A, P013C and P0159).

      Result
      Proceed to
      NEXT

    NEXT

  18. READ OUTPUT DTC (DTC P0139, P013A, P013C AND P0159 ARE OUTPUT AGAIN)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Utility / All Readiness.


      Powertrain > Engine > Utility
      Tester Display
      All Readiness

    5. Input the DTC: P0139, P013A, P013C and/or P0159.

    6. Check that the DTC monitor is NORMAL. If the DTC monitor is INCOMPLETE, perform the drive pattern again but increase the vehicle speed.

      Result
      Result Proceed to

      ABNORMAL

      (DTC P0139, P013A, P013C and/or P0159 is output)

      		 A

      NORMAL

      (DTCs are not output)

      		 B

      Tech Tips

      Perform "Inspection After Repair" after replacing the heated oxygen sensor.

      Click here


    A

    REPLACE HEATED OXYGEN SENSOR Click here

    B

    CHECK FOR INTERMITTENT PROBLEMS Click here