SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P227118, P227318

DTC Code DTC Name
P227118 A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2 Circuit Current Below Threshold
P227318 A/F (O2) Sensor Signal Biased/Stuck Rich Bank 2 Sensor 2 Circuit Current Below Threshold

DESCRIPTION

Refer to DTC P003612.

Click here

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P227118 A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 2 Circuit Current Below Threshold While the fuel-cut operation is performed (during vehicle deceleration), the air fuel ratio sensor (bank 1 sensor 2) current is less than 7.5 mA for 0.5 seconds or more (2 trip detection logic).

  • Air fuel ratio sensor (bank 1 sensor 2)

  • Intake system

  • Gas leak from exhaust system

  • Fuel pressure (for high pressure side)

  • Fuel pressure (for low pressure side)

  • Port fuel injector assembly

  • Direct fuel injector assembly

  • Fuel system

  • ECM

 Comes on DTC stored SAE: P2271
P227318 A/F (O2) Sensor Signal Biased/Stuck Rich Bank 2 Sensor 2 Circuit Current Below Threshold While the fuel-cut operation is performed (during vehicle deceleration), the air fuel ratio sensor (bank 2 sensor 2) current is less than 7.5 mA for 0.5 seconds or more (2 trip detection logic).

  • Air fuel ratio sensor (bank 2 sensor 2)

  • Intake system

  • Gas leak from exhaust system

  • Fuel pressure (for high pressure side)

  • Fuel pressure (for low pressure side)

  • Port fuel injector assembly

  • Direct fuel injector assembly

  • Fuel system

  • ECM

 Comes on DTC stored SAE: P2273

Tech Tips


  • DTC P227118 indicate malfunctions related to the bank 1 sensor 2 air fuel ratio sensor circuit.

  • DTC P227318 indicate malfunctions related to the bank 2 sensor 2 air fuel ratio sensor circuit.

  • When any of these DTCs are stored, check the air fuel ratio sensor (sensor 2) current output by entering the following menus on the GTS: Powertrain / Engine / Data List / A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S2.

  • Short-term fuel trim values can also be read using the GTS.

  • If an air fuel ratio sensor (sensor 2) malfunction is detected, the ECM will store a DTC.

MONITOR DESCRIPTION


MONITOR STRATEGY

Required Sensors/Components (Main) Air fuel ratio sensor (sensor 2)
Required Sensors/Components (Related)

Crankshaft position sensor

Engine coolant temperature sensor

Throttle position sensor
Frequency of Operation Once per driving cycle

TYPICAL ENABLING CONDITIONS

Battery voltage 11 V or higher
Engine coolant temperature 75°C (167°F) or higher
Atmospheric pressure 76 kPa(abs) [11.02 psi(abs)] or higher
Fuel cut On

TYPICAL MALFUNCTION THRESHOLDS

Duration of following condition 0.5 seconds or more
Air fuel ratio sensor (sensor 2) current Less than 7.5 mA

CONFIRMATION DRIVING PATTERN

B006FO6E08

  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 [A].

  9. Drive the vehicle at approximately 75 km/h (46 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. Using the GTS, enter the following menus to check the fuel-cut status: Powertrain / Engine / Data List / Idle Fuel Cut.

  11. With the shift state M selected, drive the vehicle at 75 km/h (46 mph), and then decelerate the vehicle by releasing the accelerator pedal for 10 seconds or more to perform the fuel-cut [C].

    CAUTION:

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

    Tech Tips

    While "Idle Fuel Cut" on the Data List is ON, fuel-cut control is being executed.

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

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

  14. 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.

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

  16. Input the DTC: P227118 or P227318.

  17. 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

    Tech Tips


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

    • If the judgment result is ABNORMAL, the system is malfunctioning.

    • If the judgment result is INCOMPLETE, drive the vehicle with the shift state M, and then perform step [C] again.

WIRING DIAGRAM

Refer to DTC P003612.

Click here

CAUTION / NOTICE / HINT

Note

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

Tech Tips


  • 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.

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

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

  • 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.

    DTC Suspected Area
    P227118 Bank 1
    P227318 Bank 2

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P227118 OR P227318)


    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.

    5. Read the DTCs.


      Powertrain > Engine > Trouble Codes
      Result
      Result Proceed to
      DTC P227118 or P227318 is output A
      DTC P227118 or P227318 and other DTCs are output B

      Tech Tips

      If any DTCs other than P227118 or P227318 are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST


    1. Has the vehicle run out of fuel in the past?

      Result
      Proceed to
      YES
      NO

    NO

    CLEAR DTC Click here

    YES

  3. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

      Result
      Proceed to
      NEXT

    NEXT

  4. CHECK WHETHER DTC OUTPUT RECURS (DTC P227118 OR P227318)


    1. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

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


      Powertrain > Engine > Utility
      Tester Display
      All Readiness

    3. Input the DTC: P227118 or P227318.

    4. Check the DTC judgment result.

      Result
      Result Proceed to

      NORMAL

      (DTCs are not output)

      		 A

      ABNORMAL

      (DTC P227118 or P227318 is output)

      		 B

    A

    DTC CAUSED BY RUNNING OUT OF FUEL

    B

  5. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

      Result
      Proceed to
      NEXT

    NEXT

  6. READ VALUE USING GTS (A/F (O2) SENSOR CURRENT)


    1. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

    2. Enter the following menus: Powertrain / Engine / Data List / A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S2.


      Powertrain > Engine > Data List
      Tester Display
      A/F (O2) Sensor Current B1S2
      A/F (O2) Sensor Current B2S2

    3. Check the test value of the air fuel ratio sensor output (sensor 2) current during fuel-cut, referring to the Driving Pattern Detail for [C] in the Confirmation Driving Pattern.

      Tech Tips


      • To measure the air fuel ratio sensor (sensor 2) current precisely, perform the fuel-cut operation as long as possible.

      • If it is difficult to measure the air fuel ratio sensor (sensor 2) current, use the snapshot function of the GTS.

      Result
      Test Value Proceed to
      Within normal range (7.5 mA or higher) A
      Outside normal range (Less than 7.5 mA) B

    B

    REPLACE AIR FUEL RATIO SENSOR (SENSOR 2) Click here

    A

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


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

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

    5. Warm up the air fuel ratio sensors at an engine speed of 2500 rpm for 90 seconds.

    6. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / A/F (O2) Sensor Current B1S1 and A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S1 and A/F (O2) Sensor Current B2S2.


      Powertrain > Engine > Active Test
      Active Test Display
      Control the Injection Volume for A/F Sensor
      Data List Display
      A/F (O2) Sensor Current B1S1
      A/F (O2) Sensor Current B2S1
      A/F (O2) Sensor Current B1S2
      A/F (O2) Sensor Current B2S2

    7. Perform the Control the Injection Volume for A/F Sensor operation with the engine idling.

    8. Monitor the output values of the air fuel ratio sensor (sensor 1) and air fuel ratio sensor (sensor 2) (A/F (O2) Sensor Current B1S1 and A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S1 and A/F (O2) Sensor Current 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%.

      • The air fuel ratio sensor (sensor 1) has an output delay of a few seconds and the air fuel ratio sensor (sensor 2) has a maximum output delay of approximately 20 seconds.

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

      Standard
      GTS Display (Sensor) Injection Volume Status Current

      A/F (O2) Sensor Current B1S1

      A/F (O2) Sensor Current B2S1

      (Air fuel ratio (sensor 1))

      		 12.5% Rich Below -0.075 mA
      -12.5% Lean More than 0.037 mA

      A/F (O2) Sensor Current B1S2

      A/F (O2) Sensor Current B1S2

      (Air fuel ratio (sensor 2))

      		 12.5% Rich Below -0.86 mA
      -12.5% Lean More than 0.33 mA
      Result
      Status of A/F (O2) Sensor Current B1S1 or A/F (O2) Sensor Current B2S1 Status of A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S2 Air Fuel Ratio Condition and Air Fuel Ratio Sensor (Sensor 2) Condition Proceed to
      Lean Lean Actual air fuel ratio lean A
      Rich Rich Actual air fuel ratio rich
      Lean/Rich Lean Air fuel ratio sensor (sensor 2) malfunction B
      Lean/Rich Rich Air fuel ratio sensor (sensor 2) malfunction
      Lean/Rich Lean/Rich Normal

      • Lean: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor (sensor 1) output current (A/F (O2) Sensor Current B1S1 or A/F (O2) Sensor Current B2S1) is consistently more than 0.037 mA, and the air fuel ratio sensor (sensor 2) output current (A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S2) is consistently more than 0.33 mA.

      • Rich: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor (sensor 1) output current (A/F (O2) Sensor Current B1S1) is consistently below -0.075 mA, and the air fuel ratio sensor (sensor 2) output current (A/F (O2) Sensor Current B1S2) is consistently below -0.86 mA.

      • Lean/Rich: During the Control the Injection Volume for A/F Sensor Active Test, the output current of the air fuel ratio sensor (sensor 1) or air fuel ratio sensor (sensor 2) alternate correctly.

      Tech Tips

      Refer to "Data List / Active Test" [A/F (O2) Sensor Current B1S1, A/F (O2) Sensor Current B1S2/F (O2) Sensor Current B2S1 and A/F (O2) Sensor Current B2S2].

      Click here


    B

    GO TO STEP 15 Click here

    A

  8. CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leaks.

      Click here

      OK
      No leaks in the intake system.

      Tech Tips

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

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  9. CHECK FOR EXHAUST GAS LEAK


    1. Check for exhaust gas leaks.

      OK
      No gas leaks in exhaust system.

      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 SYSTEM

    OK

  10. CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE)


    1. Check the fuel pressure (for low pressure side).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    CHECK FUEL LINE Click here

    OK

  11. INSPECT PORT FUEL INJECTOR ASSEMBLY


    1. Inspect the port fuel injector assembly (whether fuel volume is high or low, and whether injection pattern is poor).

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the port fuel injector assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE PORT FUEL INJECTOR ASSEMBLY Click here

    OK

  12. READ VALUE USING GTS (FUEL PRESSURE (HIGH))


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.

    5. Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (High) and Injection Mode.


      Powertrain > Engine > Data List
      Tester Display
      Fuel Pressure (High)
      Injection Mode

    6. According to the display on the GTS, read the Data List.

      Standard
      GTS Display Condition Specified Condition
      Fuel Pressure (High)

      • Park (P) selected

      • A/C: Off

      • Engine warmed up

      • Engine Speed: 3000 rpm

      • Injection Mode: Direct

      		 2400 to 20000 kPag
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE FUEL SYSTEM (FOR HIGH PRESSURE SIDE)

    OK

  13. INSPECT DIRECT FUEL INJECTOR ASSEMBLY


    1. Inspect the direct fuel injector assembly.

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the direct fuel injector assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 15 Click here

    NG

    REPLACE DIRECT FUEL INJECTOR ASSEMBLY Click here

  14. CHECK FUEL LINE


    1. Check the fuel lines for leaks or blockage.

      Result
      Proceed to
      OK
      NG

    OK

    GO TO FUEL PUMP CONTROL CIRCUIT Click here

    NG

    REPAIR OR REPLACE FUEL SYSTEM

  15. REPLACE AIR FUEL RATIO SENSOR (SENSOR 2)


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

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 2).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  16. CLEAR DTC


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Clear the DTCs.


      Powertrain > Engine > Clear DTCs

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

      Result
      Proceed to
      NEXT

    NEXT

  17. CHECK WHETHER DTC OUTPUT RECURS (DTC P227118 OR P227318)


    1. Drive the vehicle in accordance with the driving pattern described in the Confirmation Driving Pattern.

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


      Powertrain > Engine > Utility
      Tester Display
      All Readiness

    3. Input the DTC: P227118 or P227318.

    4. Check the DTC judgment result.

      Result
      Result Proceed to

      NORMAL

      (DTCs are not output)

      		 A

      ABNORMAL

      (DTC P227118 or P227318 is output)

      		 B

    A

    END

    B

    REPLACE ECM Click here