DTC P11EA-00: Bank 1 Air-Fuel Ratio Imbalance (Port); DTC P11EC-00: Cylinder #1 Air-Fuel Ratio Imbalance (Port); DTC P11ED-00: Cylinder #2 Air-Fuel Ratio Imbalance (Port); DTC P11EE-00: Cylinder #3 Air-Fuel Ratio Imbalance (Port); DTC P11EF-00: Cylinder #4 Air-Fuel Ratio Imbalance (Port); DTC P219A-00: Bank 1 Air-Fuel Ratio Imbalance; DTC P219C-00: Cylinder 1 Air-Fuel Ratio Imbalance; DTC P219D-00: Cylinder 2 Air-Fuel Ratio Imbalance; DTC P219E-00: Cylinder 3 Air-Fuel Ratio Imbalance; DTC P219F-00: Cylinder 4 Air-Fuel Ratio Imbalance [11/2023 - ]: Procedure

1. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTC P11EA-00, P11EC-00, P11ED-00, P11EE-00, P11EF-00, P219A-00, P219C-00, P219D-00, P219E-00 and/or P219F-00 is output	A
   DTC P11EA-00, P11EC-00, P11ED-00, P11EE-00, P11EF-00, P219A-00, P219C-00, P219D-00, P219E-00 and/or P219F-00 and other DTCs are output	B

   HINT: 

   If any DTCs other than DTC P11EA-00, P11EC-00, P11ED-00, P11EE-00, P11EF-00, P219A-00, P219C-00, P219D-00, P219E-00 and/or P219F-00 are output, troubleshoot those DTCs first.

Result: 

B 

GO TO DTC CHART  . Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2023 - 11/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2024 - ]

Result: 

A 

See step  2

1. Connect the GTS to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the GTS on.
4. Using the GTS, confirm the vehicle conditions recorded in the Freeze Frame Data which were present when the DTC was stored.

   Refer to FREEZE FRAME DATA [11/2023 - 11/2024] , or refer to FREEZE FRAME DATA [11/2024 - ]

   Freeze Frame Data Items for DTC P11EA-00, P11EC-00, P11ED-00, P11EE-00, P11EF-00, P219A-00, P219C-00, P219D-00, P219E-00 or P219F-00 

   • Vehicle Speed
   • Engine Speed
   • Calculate Load
   • Short FT B1S1
   • Long FT B1S1
   • Misfire Count Cylinder #1 to #4

   HINT: 

   When the sum of Short FT B1S1 and Long FT B1S1 is positive, the engine is running lean, and when the sum is negative, the engine is running rich.

   Air Fuel Ratio Sensor (Sensor 1) Monitoring Method (P11EA-00 and P219A-00)	Crankshaft Position Sensor Monitoring Method (P11EC-00, P11ED-00, P11EE-00, P11EF-00, P219C-00, P219D-00, P219E-00 and P219F-00)	Note
   DTCs are output	DTC is output (Only one DTC relating to a single cylinder is output)	Malfunctioning of cylinders detected by the Crankshaft Position Sensor Monitoring Method is primarily suspected
   DTCs are output	DTCs are output (Multiple DTCs relating to multiple cylinders are output)	Malfunctioning of cylinders except ones detected by the Crankshaft Position Sensor Monitoring Method is primarily suspected.*
   DTCs are not output	DTCs are output	Malfunctioning of cylinders detected by the Crankshaft Position Sensor Monitoring Method is primarily suspected.
   DTCs are output	DTCs are not output	Malfunctioning of the bank detected by the Air Fuel Ratio Sensor (Sensor 1) Monitoring Method is primarily suspected.

   *: When any air-fuel ratio imbalance is detected, the ECM will perform air-fuel ratio feedback control to make the air-fuel ratio close to the stoichiometric level. This may result in an air-fuel ratio imbalance of normal cylinders and DTCs may be stored.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  3

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

   HINT: 

   • If any misfire count (Misfire Count Cylinder #1 to #4) increases while idling or driving the vehicle, proceed to step 6 (CHECK INTAKE SYSTEM).
   • Perform inspections while focusing on the cylinder whose misfire count has increased.
2. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   DTC P11EA-00 or P219A-00 is output	A
   DTC P219A-00 and P219C-00, P219D-00, P219E-00 or P219F-00 is output	B
   DTC P11EA-00 and P11EC-00, P11ED-00, P11EE-00 or P11EF-00 is output
   DTC P11EC-00, P11ED-00, P11EE-00, P11EF-00, P219C-00, P219D-00, P219E-00 and/or P219F-00 is output

Result: 

B 

See step  6

Result: 

A 

See step  4

1. Put the engine in Inspection Mode (Maintenance Mode).

   Powertrain > Hybrid Control > Utility 

   Tester Display
   Inspection Mode

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

   Powertrain > Engine > Data List 

   Tester Display
   Coolant Temperature

   HINT: 

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

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

   Powertrain > Engine > Active Test 

   Active Test Display
   Control the Injection Volume

   Data List Display
   Misfire Count Cylinder #1
   Misfire Count Cylinder #2
   Misfire Count Cylinder #3
   Misfire Count Cylinder #4

   HINT: 

   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).

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

   Result

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  5

1. Check for exhaust gas leak.

   OK

   No gas leaks in exhaust system.

   HINT: 

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

   Refer to INITIALIZATION [10/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE EXHAUST SYSTEM 

Result: 

OK 

See step  6

1. Check the intake system for vacuum leaks.

   Refer to ON-VEHICLE INSPECTION [12/2019 - ]

   OK

   No leaks in the intake system.

   HINT: 

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

   Refer to INITIALIZATION [10/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE INTAKE SYSTEM 

Result: 

OK 

See step  7

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

   Refer to PROCEDURE - Step 3

   HINT: 

   Perform "Inspection After Repair" after replacing the spark plug.

   Refer to INITIALIZATION [10/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SPARK PLUG 

Refer to PROCEDURE - Step 3

Result: 

OK 

See step  8

1. Perform a spark test.

   Refer to PROCEDURE - Step 1

   HINT: 

   • If the result of the spark test is normal, proceed to the next step.
   • Perform "Inspection After Repair" after replacing the spark plug or ignition coil assembly.

     Refer to INITIALIZATION [10/2021 - ]

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  9

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

   Refer to PROCEDURE - Step 9

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the engine assembly.

   Refer to INITIALIZATION [10/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION 

Result: 

OK 

See step  10

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

   Refer to INSPECTION [12/2019 - ]

   HINT: 

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

   Refer to INITIALIZATION [10/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE PORT FUEL INJECTOR ASSEMBLY 

Refer to REMOVAL [11/2023 - ]

Result: 

OK 

See step  11

1. Check the direct fuel injector assembly.

   Refer to INSPECTION [12/2019 - ]

   HINT: 

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

   Refer to INITIALIZATION [10/2021 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE DIRECT FUEL INJECTOR ASSEMBLY 

Refer to REMOVAL [11/2023 - ]

Result: 

OK 

See step  12

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

      HINT: 

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

   2. Check that the intake manifold EGR port is not blocked by accumulating deposit.

      HINT: 

      The EGR flow rate between the cylinders may change and cause an imbalance due to EGR port blockage.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  13

1. Clear the DTCs.

   Powertrain > Engine > Clear DTCs 

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

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  14

1. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
2. Check for DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   DTCs are not output.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

END