DTC P219A, P219C-P219F; Bank 1 Air-Fuel Ratio Imbalance [08/2014 - 10/2015]: Procedure
- CHECK ANY OTHER DTCS OUTPUT
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read the DTCs.
Powertrain > Engine > Trouble Codes
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 DTC P219A, P219C, P219D, P219E and/or P219F are output, troubleshoot those DTCs first.
Result:
B
GO TO DTC CHART: DIAGNOSTIC TROUBLE CODE CHART [08/2014 - 10/2015]
Result:
A
See step 2
- READ VALUE USING TECHSTREAM (FREEZE FRAME DATA)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Using the Techstream, confirm the vehicle conditions recorded in the freeze frame data which were present when the DTC was stored.
Refer to FREEZE FRAME DATA [12/2012 - ]
Freeze Frame Data Items for DTC P219A, P219C, P219D, P219E or P219F
- Vehicle Speed
- Engine Speed
- Calculate Load
- Accelerator Idle Position
- Short FT #1
- Long FT #1
- Cylinder #1 Misfire Count to Cylinder #4 Misfire Count
- A/F Sensor Determination (worst value) #1
- Engine Speed Fluctuation Avg (worst value) #1 to #4
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) Crankshaft 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 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 Crankshaft Position Sensor Monitoring Method is primarily suspected.* DTCs are not output DTCs are output Malfunctioning of cylinders detected by Crankshaft 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. *: 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
- READ DTC OUTPUT
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- 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.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Read the DTCs.
Powertrain > Engine > Trouble Codes
Result
Result Proceed to DTC 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
- PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME)
- Connect the Techstream to the DLC3.
- Start the engine.
- Turn the Techstream on.
- Warm up the engine.
HINT:
The A/C switch and all accessory switches should be off and the shift lever should be in P or N.
- Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the Injection Volume / Gas Misfire / Cylinder #1 to #4 Misfire Count.
Powertrain > Engine > Active Test
Active Test Display Control the Injection Volume Data List Display Cylinder #1 Misfire Count Cylinder #2 Misfire Count Cylinder #3 Misfire Count Cylinder #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).
- Perform the Control the Injection Volume operation with the engine idling.
- Check the misfire counts ("Cylinder #1 Misfire Count" to "Cylinder #4 Misfire Count") 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:
NEXT
See step 5
- CHECK FOR GAS LEAK
- 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 6
- Check for exhaust gas leaks.
- CHECK INTAKE SYSTEM
- Check the intake system for vacuum leaks.
Refer to ON-VEHICLE INSPECTION [12/2012 - ]
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
- Check the intake system for vacuum leaks.
- INSPECT SPARK PLUG
- Inspect the spark plug of the cylinder causing the imbalance.
Refer to PROCEDURE - Step 2
HINT:
Perform "Inspection After Repair" after replacing the spark plug.
Refer to INITIALIZATION [12/2012 - ]
Result:
NG
REPLACE SPARK PLUG: REMOVAL [12/2012 - ]
Result:
OK
See step 8
- Inspect the spark plug of the cylinder causing the imbalance.
- CHECK FOR SPARK (SPARK TEST)
- Perform a spark test.
Refer to PROCEDURE - Step 2
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 [12/2012 - ]
Result:
NEXT
See step 9
- Perform a spark test.
- CHECK CYLINDER COMPRESSION PRESSURE
- Measure the cylinder compression pressure of the misfiring cylinder.
Refer to PROCEDURE - Step 6
HINT:
Perform "Inspection After Repair" after repairing or replacing the engine assembly.
Refer to INITIALIZATION [12/2012 - ]
Result:
NG
CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION
Result:
OK
See step 10
- Measure the cylinder compression pressure of the misfiring cylinder.
- CHECK TERMINAL VOLTAGE (POWER SOURCE OF FUEL INJECTOR ASSEMBLY)
Refer to PROCEDURE - Step 1
Result:
NG
CHECK FUEL INJECTOR CIRCUIT: Fuel Injector Circuit [12/2012 - 08/2017]
Result:
OK
See step 11
- CHECK FUEL INJECTOR ASSEMBLY OF CYLINDER CAUSING IMBALANCE
- Check the fuel injector 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 12
- Check the fuel injector injection [whether fuel volume is high or low, and whether injection pattern is poor].
- CHECK FOR CAUSE OF FAILURE
- If the cause of the problem has not been found even after performing the troubleshooting procedure, perform the inspection below.
- 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 and check the intake valve.
Result:
NEXT
See step 13
- CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Clear the DTCs.
Refer to DTC CHECK / CLEAR [12/2012 - ]
Powertrain > Engine > Clear DTCs
- Turn the ignition switch off and wait for at least 30 seconds.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
- Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.
- Check for DTCs.
Powertrain > Engine > Trouble Codes
Result
DTCs are not output.
Result:
NEXT
END