SFI SYSTEM(for Rear Air Fuel Ratio Sensor), Diagnostic DTC:P219519, P219524, P219618, P219623

DTC Code DTC Name
P219519 A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold
P219524 A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck High
P219618 A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Below Threshold
P219623 A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck Low

DESCRIPTION

Refer to DTC P003012.

Click here

Tech Tips

Although the DTC titles say oxygen sensor, these DTCs relate to the air fuel ratio sensor (sensor 1).

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P219519 A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold While the fuel-cut operation is performed (during vehicle deceleration), the air fuel ratio sensor (sensor 1) current is 2.2 mA or more for 3 seconds (2 trip detection logic).

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

  • Air fuel ratio sensor (sensor 1)

  • Intake system

  • Gas leak from exhaust system

  • Fuel pressure (for low pressure side)

  • Fuel pressure (for high pressure side)

  • Port fuel injector assembly

  • Direct fuel injector assembly

  • Fuel system

  • ECM

 Comes on DTC stored SAE Code: P2195
P219524 A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck High

Both of the following conditions are met for 5 seconds or more (2 trip detection logic):


  1. Air fuel ratio sensor (sensor 1) voltage is more than 3.8 V.

  2. Air fuel ratio sensor (sensor 2) current is less than 0.0551 mA.

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

  • Air fuel ratio sensor (sensor 1)

  • Intake system

  • Gas leak from exhaust system

  • Fuel pressure (for low pressure side)

  • Fuel pressure (for high pressure side)

  • Port fuel injector assembly

  • Direct fuel injector assembly

  • Fuel system

  • ECM

 Comes on DTC stored SAE Code: P2195
P219618 A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Below Threshold While the fuel-cut operation is performed (during vehicle deceleration), the air fuel ratio sensor (sensor 1) current is less than 0.47 mA for 3 seconds (2 trip detection logic).

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

  • Air fuel ratio sensor (sensor 1)

  • Intake system

  • Gas leak from exhaust system

  • Fuel pressure (for low pressure side)

  • Fuel pressure (for high pressure side)

  • Port fuel injector assembly

  • Direct fuel injector assembly

  • Fuel system

  • ECM

 Comes on DTC stored SAE Code: P2196
P219623 A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck Low

Both of the following conditions are met for 5 seconds or more (2 trip detection logic):


  1. Air fuel ratio sensor (sensor 1) voltage is less than 2.8 V.

  2. Air fuel ratio sensor (sensor 2) current is -0.0852 mA or more.

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

  • Air fuel ratio sensor (sensor 1)

  • Intake system

  • Gas leak from exhaust system

  • Fuel pressure (for low pressure side)

  • Fuel pressure (for high pressure side)

  • Port fuel injector assembly

  • Direct fuel injector assembly

  • Fuel system

  • ECM

 Comes on DTC stored SAE Code: P2196

Tech Tips


  • When any of these DTCs are stored, check the air fuel ratio sensor (sensor 1) voltage output by entering the following menus on the GTS: Powertrain / Engine / Data List / A/F (O2) Sensor Voltage B1S1.

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

  • If an air fuel ratio sensor (sensor 1) malfunction is detected, the ECM will store a DTC.

MONITOR DESCRIPTION



B007X9OE07

MONITOR STRATEGY

Required Sensors/Components (Main) Air fuel ratio sensor (sensor 1)
Required Sensors/Components (Related) Air fuel ratio sensor (sensor 2)
Frequency of Operation Once per driving cycle
Duration

3 seconds: Sensor limit current

5 seconds: Sensor low/high voltage

TYPICAL ENABLING CONDITIONS

Air Fuel Ratio Sensor (Sensor 1) Low/High Voltage
Time after engine start 30 seconds or more
Battery voltage 11 V or higher
Air fuel ratio sensor (sensor 1) status Activated
Fuel system status Closed-loop
Air Fuel Ratio Sensor (Sensor 1) Limit Current
Battery voltage 11 V or higher
Engine coolant temperature 75°C (167°F) or higher
Atmospheric pressure 76 kPa(abs) [11 psi(abs)] or higher
Air fuel ratio sensor (sensor 1) status Activated
Continuous time of fuel-cut 3 seconds or more, and less than 10 seconds

TYPICAL MALFUNCTION THRESHOLDS

P219524: Air Fuel Ratio Sensor (Sensor 1) High Voltage (Lean Side Malfunction)
Air fuel ratio sensor (sensor 2) current Less than 0.0551 mA
Air fuel ratio sensor (sensor 1) voltage More than 3.8 V
P219623: Air Fuel Ratio Sensor (Sensor 1) Low Voltage (Rich Side Malfunction)
Air fuel ratio sensor (sensor 2) current -0.0852 mA or more
Air fuel ratio sensor (sensor 1) voltage Less than 2.8 V
P219519: Air Fuel Ratio Sensor (Sensor 1) Limit Current (High Side Malfunction)
Duration of following condition 3 seconds or more
Air fuel ratio sensor (sensor 1) current 2.2 mA or more
P219618: Air Fuel Ratio Sensor (Sensor 1) Limit Current (Low Side Malfunction)
Duration of following condition 3 seconds or more
Air fuel ratio sensor (sensor 1) current Less than 0.47 mA

CONFIRMATION DRIVING PATTERN

B007WP6E27
B007WM4E15

  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 reaches 75°C (167°F) or higher [A].

  9. Drive the vehicle at a speed between 60 and 100 km/h (37 and 62 mph) for at least 10 minutes [B].

    CAUTION:

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

  10. With the shift lever in M [C], accelerate the vehicle to 60 km/h (37 mph) or more by depressing the accelerator pedal for at least 10 seconds [D].

    CAUTION:

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

  11. Soon after performing step [D] above, release the accelerator pedal for at least 5 seconds without depressing the brake pedal in order to execute fuel-cut control [E].

  12. Allow the vehicle to decelerate until the vehicle speed decreases to less than 10 km/h (6 mph).

  13. Repeat steps [C] through [E] above at least 3 times in one driving cycle.

  14. Enter the following menus: Powertrain / Engine / Trouble Codes [F].

  15. 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.

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

  17. Input the DTC: P219519, P219524, P219618 or P219623.

  18. 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 shows NORMAL, the system is normal.

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

    • If the judgment result shows INCOMPLETE, perform steps [B] through [F] again.

WIRING DIAGRAM

Refer to DTC P003012.

Click here

CAUTION / NOTICE / HINT

Note

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

Tech Tips


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

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

  • A low air fuel ratio sensor (sensor 1) voltage could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.

  • A high air fuel ratio sensor (sensor 1) voltage could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.

  • 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. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P219519, P219524, P219618 OR P219623)


    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 P219519, P219524, P219618 or P219623 is output A
      DTC P219519, P219524, P219618 or P219623 and P00D562 are output
      DTC P219519, P219524, P219618 or P219623 and other DTCs are output B

      Tech Tips

      If any DTCs other than P219519, P219524, P219618 or P219623 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 P219519, P219524, P219618 OR P219623)


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

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


      Powertrain > Engine > Utility
      Tester Display
      All Readiness

    3. Input the DTC: P219519, P219524, P219618 or P219623.

    4. Check the DTC judgment.

      Result
      Result Proceed to

      NORMAL

      (DTCs are not output)

      		 A

      ABNORMAL

      (DTC P219519, P219524, P219618 or P219623 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 B1S1)


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

    2. Enter the following menus: Powertrain / Engine / Data List / A/F (O2) Sensor Current B1S1.


      Powertrain > Engine > Data List
      Tester Display
      A/F (O2) Sensor Current B1S1

    3. Check the test value of the air fuel ratio sensor output (sensor 1) current during fuel-cut, referring to the Driving Pattern Detail for [C] through [E] in the Confirmation Driving Pattern.

      Tech Tips


      • To measure the air fuel ratio sensor (sensor 1) current precisely, perform the fuel-cut operation as long as possible.

      • If it is difficult to measure the air fuel ratio sensor (sensor 1) current, use the snapshot function of the GTS.

      Result
      Test Value Proceed to

      Within normal range

      (0.47 mA or more, and less than 2.2 mA)

      		 A

      Outside normal range

      (less than 0.47 mA, or 2.2 mA or more)

      		 B

    B

    GO TO STEP 14 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 enigne 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 / Coolant Temperature, A/F (O2) Sensor Voltage B1S1 and A/F (O2) Sensor Current B1S2.


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

    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 sensors (A/F (O2) Sensor Voltage B1S1 and A/F (O2) Sensor Current B1S2) 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 Value

      A/F (O2) Sensor Voltage B1S1

      (Air fuel ratio sensor (sensor 1))

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

      A/F (O2) Sensor Current B1S2

      (Air fuel ratio sensor (sensor 2))

      		 12.5% Rich Below -0.86 mA
      -12.5% Lean More than 0.33 mA
      Result
      Status of A/F (O2) Sensor Voltage B1S1 Status of A/F (O2) Sensor Current B1S2 Air Fuel Ratio Condition and Air Fuel Ratio Sensor (Sensor 1) Condition Proceed to
      Lean Lean Actual air fuel ratio lean A
      Rich Rich Actual air fuel ratio rich
      Lean Lean/Rich Air fuel ratio sensor (sensor 1) malfunction B
      Rich Lean/Rich Air fuel ratio sensor (sensor 1) 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 voltage (A/F (O2) Sensor Voltage B1S1) is consistently higher than 3.4 V, and the air fuel ratio sensor (sensor 2) output current (A/F (O2) Sensor Current B1S2) 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 voltage (A/F (O2) Sensor Voltage B1S1) is consistently below 3.1 V, 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 value 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 Voltage B1S1, A/F (O2) Sensor Current B1S2].

      Click here


    B

    GO TO STEP 14 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 and warm it up until the engine coolant temperature is 75°C (167°F) or higher with all the accessories switched off.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed, Coolant Temperature, Fuel Pressure (High) and Injection Mode.


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

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

      Standard
      GTS Display Condition Specified Condition
      Fuel Pressure (High)

      • Shift position: P

      • A/C: Off

      • Engine warmed up

      • Engine Speed: 3000 rpm

      • Injection Mode: Direct

      		 4000 to 8000 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

    NG

    REPLACE DIRECT FUEL INJECTOR ASSEMBLY Click here

    OK

  14. REPLACE AIR FUEL RATIO SENSOR (SENSOR 1)


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

      Click here

      Tech Tips

      Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 1).

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  15. 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

  16. CHECK WHETHER DTC OUTPUT RECURS (DTC P219519, P219524, P219618 OR P219623)


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

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


      Powertrain > Engine > Utility
      Tester Display
      All Readiness

    3. Input the DTC: P219519, P219524, P219618 or P219623.

    4. Check the DTC judgment result.

      Result
      Result Proceed to

      NORMAL

      (DTCs are not output)

      		 A

      ABNORMAL

      (DTC P219519, P219524, P219618 or P219623 is output)

      		 B

    A

    END

    B

    REPLACE ECM Click here

  17. 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 LINE