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Home >> Toyota >> 2018 >> RAV4 XLE, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> SFI System [2AR-FE] (Diagnostic Codes) (Except Hybrid) (2 Of 7) >> SFI System >> DTC P2195, P2196; Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1) [12/2012 - 08/2014] >> Procedure

DTC P2195, P2196; Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1) [12/2012 - 08/2014]: Procedure

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2195 OR P2196) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
    5. Read the DTCs.

      Powertrain > Engine and ECT > Trouble Codes 

      Result

      Result Proceed to
      DTC P2195 or P2196 is output A
      DTC P2195 or P2196 and P0136, P0137 or P0138 are output
      DTC P2195 or P2196 and other DTCs are output B

      HINT: 

      If any DTCs relating to the air fuel ratio sensor (DTCs for the air fuel ratio sensor heater or air fuel ratio sensor admittance) are output, troubleshoot those DTCs first.

    Result: 

    B 

    GO TO DTC CHART:  DIAGNOSTIC TROUBLE CODE CHART [12/2012 - 11/2013]  ,  DIAGNOSTIC TROUBLE CODE CHART [11/2013 - 08/2014] 

    Result: 

    A 

    See step  2

  2. CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST 
    1. Has the vehicle run out of fuel in the past?

    Result: 

    NO 

    See step  4

    Result: 

    YES 

    See step  3

  3. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195 OR P2196) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [12/2012 - ]

      Powertrain > Engine and ECT > Clear DTCs 

    5. Turn the ignition switch off and wait for at least 30 seconds.
    6. Turn the ignition switch to ON.
    7. Turn the Techstream on.
    8. Start the engine and warm it up.
    9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      Powertrain > Engine and ECT > Utility 

      Tester Display
      All Readiness
    11. Input the DTC: P2195 or P2196.
    12. Check the DTC judgment.

      Result

      Result Proceed to
      NORMAL (DTC is not output) A
      ABNORMAL (DTC P2195 or P2196 is output) B

    Result: 

    A 

    DTC CAUSED BY RUNNING OUT OF FUEL 

    Result: 

    B 

    See step  4

  4. READ VALUE USING TECHSTREAM (TEST VALUE OF AIR FUEL RATIO SENSOR) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [12/2012 - ]

      Powertrain > Engine and ECT > Clear DTCs 

    5. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    6. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / O2 Sensor / Current.

      Powertrain > Engine and ECT > Monitor 

    7. Check that the status of O2 Sensor is Complete. If the status is still Incomplete, drive the vehicle according to the driving pattern again.
    8. Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor / O2 Sensor / Details / RANGE B1S1.

      Powertrain > Engine and ECT > Monitor 

    9. Check the test value of the air fuel ratio sensor output current during fuel-cut.

      Result

      Result Proceed to
      Within normal range (0.7 mA or higher, and lower than 2.2 mA) A
      Outside normal range (lower than 0.7 mA, or 2.2 mA or higher) B

    Result: 

    B 

    See step  15

    Result: 

    A 

    See step  5

  5. READ VALUE USING TECHSTREAM (OUTPUT VOLTAGE OF AIR FUEL RATIO SENSOR) 
    1. Connect the Techstream to the DLC3.
    2. Start the engine.
    3. Turn the Techstream on.
    4. Warm up the air fuel ratio sensor at an engine speed of 2500 rpm for 90 seconds.
    5. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume for A/F Sensor / Gas AF Control / AFS Voltage B1S1 and O2S B1S2.

      Powertrain > Engine and ECT > Active Test 

      Active Test Display
      Control the Injection Volume for A/F Sensor
      Data List Display
      AFS Voltage B1S1
      O2S B1S2
    6. Perform the Control the Injection Volume operation with the engine idling.
    7. Monitor the output voltages of the air fuel ratio and heated oxygen sensors (AFS Voltage B1S1 and O2S B1S2) displayed on the Techstream.

      HINT: 

      • Change the fuel injection volume within the range of -12.5% to +12.5%.
      • 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.
      Techstream Display (Sensor) Injection Volume Status Voltage
      AFS Voltage B1S1
      (Air fuel ratio)      		 +12.5% Rich Below 3.1 V
      AFS Voltage B1S1
      (Air fuel ratio)      		 -12.5% Lean Higher than 3.4 V
      O2S B1S2
      (Heated oxygen)      		 +12.5% Rich Higher than 0.55 V
      O2S B1S2
      (Heated oxygen)      		 -12.5% Lean Below 0.4 V

      Result

      Status of AFS Voltage B1S1 Status of O2S B1S2 Air Fuel Ratio Condition and Air Fuel Ratio Sensor 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 malfunction B
      Rich Lean/Rich Air fuel ratio sensor malfunction
      Lean/Rich Lean/Rich Normal

      Lean: During the Control the Injection Volume Active Test, the air fuel ratio sensor output voltage (AFS Voltage B1S1) is consistently higher than 3.4 V, and the heated oxygen sensor output voltage (O2S B1S2) is consistently below 0.4 V.

      Rich: During the Control the Injection Volume Active Test, the AFS Voltage B1S1 is consistently below 3.1 V, and the O2S B1S2 is consistently higher than 0.55 V.

      Lean/Rich: During the Control the Injection Volume Active Test, the output voltage of the heated oxygen sensor alternates correctly.

      HINT: 

      Refer to "Data List / Active Test" [AFS Voltage B1S1 and O2S B1S2].

      Refer to DATA LIST / ACTIVE TEST [12/2012 - ]

    Result: 

    B 

    See step  15

    Result: 

    A 

    See step  6

  6. CHECK INTAKE SYSTEM 
    1. Check the intake system for vacuum leaks.

      Refer to PROCEDURE - Step 1

      OK

      No leaks in the intake system.

      HINT: 

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

      Refer to INITIALIZATION [12/2012 - ]

    Result: 

    NG 

    REPAIR OR REPLACE INTAKE SYSTEM 

    Result: 

    OK 

    See step  7

  7. CHECK FOR EXHAUST GAS LEAK 
    1. Check for exhaust gas leaks.

      OK

      No gas leaks.

      HINT: 

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

      Refer to INITIALIZATION [12/2012 - ]

    Result: 

    NG 

    REPAIR OR REPLACE EXHAUST SYSTEM 

    Result: 

    OK 

    See step  8

  8. CHECK FUEL PRESSURE 
    1. Check the fuel pressure.

      Refer to PROCEDURE - Step 2

    Result: 

    NG 

    See step  14

    Result: 

    OK 

    See step  9

  9. INSPECT FUEL INJECTOR ASSEMBLY 
    1. Inspect the fuel injector assembly injection (whether fuel volume is high or low, and whether injection pattern is poor).

      Refer to INSPECTION [12/2012 - ]

      HINT: 

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

      Refer to INITIALIZATION [12/2012 - ]

    Result: 

    NG 

    REPLACE FUEL INJECTOR ASSEMBLY:  REMOVAL [12/2012 - ] 

    Result: 

    OK 

    See step  10

  10. REPLACE AIR FUEL RATIO SENSOR 
    1. Replace the air fuel ratio sensor.

      Refer to REMOVAL [12/2012 - ]

      HINT: 

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

      Refer to INITIALIZATION [12/2012 - ]

    Result: 

    NEXT 

    See step  11

  11. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195 OR P2196) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Powertrain > Engine and ECT > Clear DTCs 

    5. Turn the ignition switch off and wait for at least 30 seconds.
    6. Turn the ignition switch to ON.
    7. Turn the Techstream on.
    8. Start the engine and warm it up.
    9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      Powertrain > Engine and ECT > Utility 

      Tester Display
      All Readiness
    11. Input the DTC: P2195 or P2196.
    12. Check the DTC judgment result.

      Result

      Result Proceed to
      ABNORMAL (DTC P2195 or P2196 is output) A
      NORMAL (DTC is not output) B

    Result: 

    B 

    END 

    Result: 

    A 

    See step  12

  12. REPLACE ECM 
    1. Replace the ECM.

      Refer to REMOVAL [12/2012 - ]

    Result: 

    NEXT 

    See step  13

  13. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [12/2012 - ]

      Powertrain > Engine and ECT > Clear DTCs 

    5. Turn the ignition switch off and wait for at least 30 seconds.
    6. Turn the ignition switch to ON.
    7. Turn the Techstream on.
    8. Start the engine and warm it up.
    9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      Powertrain > Engine and ECT > Utility 

      Tester Display
      All Readiness
    11. Input the DTC: P2195 or P2196.
    12. Check the DTC judgment result.

      Result

      Techstream 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

    Result: 

    NEXT 

    END 

  14. CHECK FUEL LINE 
    1. Check the fuel lines for leaks or blockage.

      HINT: 

      Perform "Inspection After Repair" after replacing the fuel pump.

      Refer to INITIALIZATION [12/2012 - ]

    Result: 

    OK 

    REPLACE FUEL PUMP:  REMOVAL [12/2012 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE FUEL LINE 

  15. REPLACE AIR FUEL RATIO SENSOR 
    1. Replace the air fuel ratio sensor.

      Refer to REMOVAL [12/2012 - ]

      HINT: 

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

      Refer to INITIALIZATION [12/2012 - ]

    Result: 

    NEXT 

    See step  16

  16. CHECK WHETHER DTC OUTPUT RECURS (DTC P2195 OR P2196) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [12/2012 - ]

      Powertrain > Engine and ECT > Clear DTCs 

    5. Turn the ignition switch off and wait for at least 30 seconds.
    6. Turn the ignition switch to ON.
    7. Turn the Techstream on.
    8. Start the engine and warm it up.
    9. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
    10. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

      Powertrain > Engine and ECT > Utility 

      Tester Display
      All Readiness
    11. Input the DTC: P2195 or P2196.
    12. Check the DTC judgment result.

      Result

      Result Proceed to
      NORMAL (DTC is not output) A
      ABNORMAL (DTC P2195 or P2196 is output) B

    Result: 

    A 

    END 

    Result: 

    B 

    REPLACE ECM:  REMOVAL [12/2012 - ] 

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