SFI SYSTEM, Diagnostic DTC:P219A

DTC Code DTC Name
P219A Bank 1 Air-Fuel Ratio Imbalance

DESCRIPTION

Refer to DTC P0300 Click here.

Refer to DTC P2195 Click here.

DTC No. DTC Detection Condition Trouble Area
P219A

One of the following conditions is met (2 trip detection logic):


  • Air fuel ratio sensor signal fluctuates in air fuel ratio feedback control.

  • Crankshaft position sensor signal fluctuates in air fuel ratio feedback control.

  • Fuel injector assembly (for port injection)

  • Fuel injector assembly (for direct injection)

  • Intake system

  • Gas leaks from exhaust system

  • Ignition system

  • Compression pressure

  • Air fuel ratio sensor

  • ECM

MONITOR DESCRIPTION




CONFIRMATION DRIVING PATTERN

A004KP7E03

  1. Connect the GTS to the DLC3.

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

  3. Clear DTCs (even if no DTCs are stored, perform the clear DTC operation) Click here.

  4. Turn the ignition switch off and wait for at least 30 seconds.

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

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

    Tech Tips

    Check the engine coolant temperature is 20°C (68°F) or less at engine started.

  7. Perform the following the confirmation driving pattern.

    CAUTION:

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


    1. Drive the vehicle at 80 km/h (50 mph) or more for 20 minutes or more [A].

    2. Stop the vehicle.

    3. Idle the engine for 1 minute or more [B].

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

  9. Read 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.

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

  11. Input the DTC: P219A.

  12. 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.

  13. If the test result is INCOMPLETE or N/A and no DTC is output, perform a universal trip and check for permanent DTCs Click here.

    Tech Tips


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

    • If no permanent DTC is output, the system is normal.

WIRING DIAGRAM

Refer to P0030 Click here.

Refer to P0335 Click here.

CAUTION / NOTICE / HINT

Tech Tips


  • 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, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

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

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

  • 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.

PROCEDURE


  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P219A)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

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

    5. Read the DTCs.

      Result
      Result Proceed to
      DTC P219A is output A
      DTC P219A and other DTCs are output B

      Tech Tips

      If any DTCs other than P219A are output, troubleshoot those DTCs first.


    B

    GO TO DTC CHART Click here

    A

  2. READ VALUE USING GTS (FREEZE FRAME DATA)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Using the GTS, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored Click here.


        Freeze Frame Data Items for DTC P219A

      • Vehicle Speed

      • Engine Speed

      • Calculate Load

      • Accelerator Idle Position

      • Short FT #1

      • Long FT #1

      • Cylinder #1 Misfire Count to Cylinder #4 Misfire Count

      Tech Tips

      When the sum of Short FT and Long FT is positive, the engine is running lean, and when the sum is negative, the engine is running rich.

      DTC stored during idling It is possible to conclude that the problem was detected due to a "lean imbalance" (detected using crankshaft speed variation).
      DTC stored while vehicle being driven It is possible to conclude that the problem was detected due to a "rich imbalance" (detected using the air fuel ratio sensor).

    NEXT

  3. PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME)


    1. Connect the GTS to the DLC3.

    2. Start the engine.

    3. Turn the GTS on.

    4. Warm up the engine.

      Tech Tips

      The A/C switch and all accessory switches should be off and the shift lever should be in P, N or neutral.

    5. Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume / Cylinder #1 to #4 Misfire Count.

      Tech Tips

      When the "Control the Injection Volume" Active Test is selected (injection volume is 0%), if a misfire count increases, proceed to step 6 (Check Intake System).

    6. Perform the Control the Injection Volume operation with the engine idling.

    7. Check the misfire counts ("Cylinder #1 Misfire Count" to "Cylinder #4 Misfire Count") while decreasing the injection volume in 5% increments.

      Note

      Do not decrease the injection volume by higher than 20%.

      Result
      The cylinder whose misfire count has not increased can be assumed to be running rich. Therefore, perform inspections while focusing on that cylinder.

    NEXT

  4. CHECK FOR EXHAUST GAS LEAK


    1. Check for exhaust gas leaks.

      OK
      No gas leaks.

    NG

    REPAIR OR REPLACE EXHAUST SYSTEM

    OK

  5. CHECK INTAKE SYSTEM


    1. Check the intake system for vacuum leaks Click here.

      OK
      No leaks in the intake system.

    NG

    REPAIR OR REPLACE INTAKE SYSTEM

    OK

  6. INSPECT SPARK PLUG


    1. Inspect the spark plug of the cylinder causing the imbalance Click here.


    NG

    REPLACE SPARK PLUG Click here

    OK

  7. CHECK FOR SPARK (SPARK TEST)


    1. Perform a spark test Click here.

      Tech Tips

      If the result of the spark test is normal, proceed to the next step.


    NEXT

  8. CHECK CYLINDER COMPRESSION PRESSURE


    1. Measure the cylinder compression pressure of the misfiring cylinder Click here.


    NG

    CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

    OK

  9. CHECK HARNESS AND CONNECTOR (POWER SOURCE VOLTAGE)


    1. A004H6EE04
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Fuel Injector Assembly)
      *b No. 1 cylinder
      *c No. 2 cylinder
      *d No. 3 cylinder
      *e No. 4 cylinder

      Disconnect the fuel injector assembly (for port injection) connector.

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      C8-1 - Body ground Ignition switch ON 11 to 14 V
      C30-1 - Body ground Ignition switch ON 11 to 14 V
      C9-1 - Body ground Ignition switch ON 11 to 14 V
      C31-1 - Body ground Ignition switch ON 11 to 14 V

    NG

    GO TO FUEL INJECTOR CIRCUIT Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (FUEL INJECTOR ASSEMBLY - ECM)


    1. Check the harness and connector of fuel injector assembly (for port injection) Click here.

    2. Check the harness and connector of fuel injector assembly (for direct injection) Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK FUEL INJECTOR ASSEMBLY OF CYLINDER CAUSING IMBALANCE


    1. Check the fuel injector assembly (for port injection) [whether fuel volume is high or low, and whether injection pattern is poor] Click here.

    2. Check the fuel injector assembly (for direct injection) [whether fuel volume is high or low, and whether injection pattern is poor] Click here.

      Result
      Result Proceed to
      OK A
      Fuel injector assembly (for port injection) is NG. B
      Fuel injector assembly (for direct injection) is NG. C

    B

    REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION) Click here

    C

    REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) Click here

    A

  12. CHECK FOR CAUSE OF FAILURE


    1. If the cause of the problem has not been found even after performing the troubleshooting procedure, perform the inspection below.

    2. Check the intake valve for deposits.

      Tech Tips

      As the DTC may have been stored due to deposits on the intake valve, remove the cylinder head and check the intake valve.


    NEXT

  13. CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Clear the DTCs Click here.

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

    6. Turn the ignition switch to ON.

    7. Turn the GTS on.

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

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

    10. Check for DTCs.

      Result
      P219A is not output.

    NEXT

    END