DTC P219A: Bank 1 Air-Fuel Ratio Imbalance; DTC P219C: Cylinder 1 Air-Fuel Ratio Imbalance; DTC P219D: Cylinder 2 Air-Fuel Ratio Imbalance; DTC P219E: Cylinder 3 Air-Fuel Ratio Imbalance; DTC P219F: Cylinder 4 Air-Fuel Ratio Imbalance [10/2014 - 10/2015]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
5. Read DTCs.
   RESULT
   
   

   Result	Proceed to
   DTC P219A, P219C, P219D, P219E and/or P219F is output	A
   DTC P219A, P219C, P219D, P219E and/or P219F and other DTCs are output	B

   HINT: 

   If any DTCs other than P219A, P219C, P219D, P219E and/or P219F are output, troubleshoot those DTCs first.

Result: 

B 

GO TO DTC CHART 

(Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2014 - 10/2015] )

Result: 

A 

See step  2

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored (Refer to DTC CHECK / CLEAR [10/2014 - ] ).

   Freeze Frame Data Items for DTC P219A, P219C, P219D, P219E and/or P219F: 

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

   HINT: 

   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.

   Air Fuel Ratio Sensor Monitoring Method (P219A)	Crank Position Sensor Monitoring Method (P219C, P219D, P219E and P219F)	Note
   DTCs are output	DTC is output (Only one DTC relating to a single cylinder is output)	Malfunctioning of cylinders detected by Crank 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 Crank Position Sensor Monitoring Method is primarily suspected.*1
   DTCs are not output	DTCs are output	Malfunctioning of cylinders detected by Crank Position Sensor Monitoring Method is primarily suspected.
   DTCs are output	DTCs are not output	Malfunctioning of the bank detected by Air Fuel Ratio Sensor Monitoring Method is primarily suspected

   *1: 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: 

NEXT 

See step  3

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Put the engine in inspection mode (maintenance mode) (Refer to INSPECTION MODE PROCEDURE [10/2014 - ] ).
5. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

   HINT: 

   • If any misfire count ("Cylinder #1 Misfire Count" to "Cylinder #4 Misfire Count) increases while idling or driving the vehicle, proceed to step 6.
   • Perform inspections while focusing on the cylinder whose misfire count has increased.
6. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
7. Read the DTCs.
   RESULT
   
   

   Result	Proceed to
   P219A is output	A
   DTC P219A and P219C, P219D, P219E or P219F is output	B
   DTC P219C, P219D, P219E and/or P219F is output

Result: 

B 

See step  6

Result: 

A 

See step  4

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Put the engine in inspection mode (maintenance mode) (Refer to INSPECTION MODE PROCEDURE [10/2014 - ] ).
5. Warm up the engine.

   HINT: 

   The A/C switch and all accessory switches should be off.

6. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Data List / Cylinder #1 to #4 Misfire Count.

   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).

7. Perform the Control the Injection Volume operation with the engine idling.
8. 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 more 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.

Result: 

NEXT 

See step  5

1. Check for exhaust gas leaks.

   OK

   No exhaust gas leaks.

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the exhaust system (Refer to INITIALIZATION [10/2014 - ] ).

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 [10/2014 - ] ).

   OK

   No leaks in intake system.

   HINT: 

   Perform "Inspection After Repair" after repairing or replacing the intake system (Refer to INITIALIZATION [10/2014 - ] ).

Result: 

NG 

REPAIR OR REPLACE INTAKE SYSTEM 

Result: 

OK 

See step  7

1. Inspect the spark plug of the imbalanced cylinder (Refer to PROCEDURE - Step 3 ).

   HINT: 

   Perform "Inspection After Repair" after replacing the spark plug (Refer to INITIALIZATION [10/2014 - ] ).

Result: 

NG 

REPLACE SPARK PLUG 

(Refer to REMOVAL [10/2014 - ] )

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 repairing or replacing the ignition system (Refer to INITIALIZATION [10/2014 - ] ).

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 [10/2014 - ] ).

Result: 

NG 

CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION 

Result: 

OK 

See step  10

Refer to PROCEDURE - Step 8

Result: 

NG 

GO TO FUEL INJECTOR CIRCUIT 

(Refer to Fuel Injector Circuit [10/2014 - 10/2015] )

Result: 

OK 

See step  11

1. Check the fuel injector injection [whether fuel volume is high or low, and whether injection pattern is poor] (Refer to INSPECTION [10/2014 - ] ).

   HINT: 

   Perform "Inspection After Repair" after replacing the fuel injector assembly (Refer to INITIALIZATION [10/2014 - ] ).

Result: 

NG 

REPLACE FUEL INJECTOR ASSEMBLY 

(Refer to REMOVAL [10/2014 - ] )

Result: 

OK 

See step  12

1. If the diagnosis procedure has been performed and the malfunctioning part cannot be determined, perform the following inspection.
2. Check for deposits on the intake valves.

   HINT: 

   The DTC may have been stored due to deposits that have accumulated in the intake valve. Therefore, remove the cylinder head and inspect the intake valves.

3. Check for deposits in the EGR delivery chamber.

   HINT: 

   The DTC may have been stored due to deposits that have accumulated in the EGR delivery chamber. Therefore, remove and inspect the EGR delivery chamber.

Result: 

NEXT 

See step  13

1. Connect the Techstream to the DLC3.
2. Turn the power switch on (IG).
3. Turn the Techstream on.
4. Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
5. Check for DTCs.

   Result

   DTCs are not output.

Result: 

NEXT 

END