Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Bank 1 Air-Fuel Ratio Imbalance (Port) (P11EA00-P11EF00,P11F000,P11F100,P219A00-P219F00,P21A000,P21A100)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / 2gr-fks Engine Control / Sfi System / Bank 1 Air-Fuel Ratio Imbalance (Port) (P11EA00-P11EF00,P11F000,P11F100,P219A00-P219F00,P21A000,P21A100)

DESCRIPTION

Refer to DTC P030000.

Click here

Refer to DTC P219519.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P11EA00	Bank 1 Air-Fuel Ratio Imbalance (Port)	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 1 sensor 1) ECM	Comes on	DTC stored	SAE Code: P11EA
P11EB00	Bank 2 Air-Fuel Ratio Imbalance (Port)	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 2 sensor 1) ECM	Comes on	DTC stored	SAE Code: P11EB
P11EC00	Cylinder #1 Air-Fuel Ratio Imbalance (Port)	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 1 sensor 1) ECM	Comes on	DTC stored	SAE Code: P11EC
P11ED00	Cylinder #2 Air-Fuel Ratio Imbalance (Port)	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 2 sensor 1) ECM	Comes on	DTC stored	SAE Code: P11ED
P11EE00	Cylinder #3 Air-Fuel Ratio Imbalance (Port)	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 1 sensor 1) ECM	Comes on	DTC stored	SAE Code: P11EE
P11EF00	Cylinder #4 Air-Fuel Ratio Imbalance (Port)	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 2 sensor 1) ECM	Comes on	DTC stored	SAE Code: P11EF
P11F000	Cylinder #5 Air-Fuel Ratio Imbalance (Port)	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 1 sensor 1) ECM	Comes on	DTC stored	SAE Code: P11F0
P11F100	Cylinder #6 Air-Fuel Ratio Imbalance (Port)	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 2 sensor 1) ECM	Comes on	DTC stored	SAE Code: P11F1
P219A00	Bank 1 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 1 sensor 1) ECM	Comes on	DTC stored	SAE Code: P219A
P219B00	Bank 2 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 2 sensor 1) ECM	Comes on	DTC stored	SAE Code: P219B
P219C00	Cylinder 1 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 1 sensor 1) ECM	Comes on	DTC stored	SAE Code: P219C
P219D00	Cylinder 2 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 2 sensor 1) ECM	Comes on	DTC stored	SAE Code: P219D
P219E00	Cylinder 3 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 1 sensor 1) ECM	Comes on	DTC stored	SAE Code: P219E
P219F00	Cylinder 4 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 2 sensor 1) ECM	Comes on	DTC stored	SAE Code: P219F
P21A000	Cylinder 5 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 1 sensor 1) ECM	Comes on	DTC stored	SAE Code: P21A0
P21A100	Cylinder 6 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	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 (bank 2 sensor 1) ECM	Comes on	DTC stored	SAE Code: P21A1

MONITOR DESCRIPTION

Fuel System Air Fuel Ratio Cylinder Imbalance Monitor

The ECM uses the air fuel ratio sensor and crankshaft position sensor to monitor the difference in air fuel ratios between the cylinders caused by differences in injection volumes between the cylinders, leakage in the intake or exhaust system, etc.

When the air fuel ratios of the cylinders are lean or rich with respect to each other, the ECM determines that there is a malfunction, illuminates the MIL and stores a DTC.

Air Fuel Ratio Sensor Monitoring Method: P11EA00 and/or P11EB00 (for port injection), or P219A00 and/or P219B00 (for direct injection) are stored primarily when a rich side imbalance is detected.

When the system detects a difference in air fuel ratios between the cylinders due to fluctuation in the air fuel ratio sensor output over 1 engine cycle (2 crankshaft revolutions), the system determines that there is a problem.

Crankshaft Position Sensor Monitoring Method: P11EC00, P11ED00, P11EE00, P11EF00, P11F000 and/or P11F100 (for port injection), or P219C00, P219D00, P219E00, P219F00, P21A000 and/or P21A100 (for direct injection) are stored primarily when a lean side imbalance is detected.

The system monitors the engine speed variation and when the variation becomes large, the system determines that there is a difference in air fuel ratios between the cylinders, which it determines to be a problem.

MONITOR STRATEGY

Related DTCs	P11EA: Air fuel ratio cylinder imbalance monitor (for port injection of bank 1) P11EB: Air fuel ratio cylinder imbalance monitor (for port injection of bank 2) P11EC: Air fuel ratio cylinder imbalance monitor (for port injection of cylinder 1) P11ED: Air fuel ratio cylinder imbalance monitor (for port injection of cylinder 2) P11EE: Air fuel ratio cylinder imbalance monitor (for port injection of cylinder 3) P11EF: Air fuel ratio cylinder imbalance monitor (for port injection of cylinder 4) P11F0: Air fuel ratio cylinder imbalance monitor (for port injection of cylinder 5) P11F1: Air fuel ratio cylinder imbalance monitor (for port injection of cylinder 6) P219A: Air fuel ratio cylinder imbalance monitor (for direct injection of bank 1) P219B: Air fuel ratio cylinder imbalance monitor (for direct injection of bank 2) P219C: Air fuel ratio cylinder imbalance monitor (for direct injection of cylinder 1) P219D: Air fuel ratio cylinder imbalance monitor (for direct injection of cylinder 2) P219E: Air fuel ratio cylinder imbalance monitor (for direct injection of cylinder 3) P219F: Air fuel ratio cylinder imbalance monitor (for direct injection of cylinder 4) P21A0: Air fuel ratio cylinder imbalance monitor (for direct injection of cylinder 5) P21A1: Air fuel ratio cylinder imbalance monitor (for direct injection of cylinder 6)
Required Sensors/Components (Main)	Air fuel ratio sensor Crankshaft position sensor
Required Sensors/Components (Related)	Mass air flow meter sub-assembly Engine coolant temperature sensor Vehicle speed sensor
Frequency of Operation	Once per driving cycle
Duration	20 seconds: Air fuel ratio sensor monitoring method 30 seconds: Crankshaft position sensor monitoring method
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

P11EA, P11EB, P219A and P219B: Air Fuel Ratio Sensor Monitoring Method

Monitor runs whenever the following DTCs are not stored	P0010, P0020 (VVT oil control solenoid bank 1, 2) P0011, P0021 (VVT system bank 1, 2 - advance) P0012, P0022 (VVT system bank 1, 2 - retard) P0013, P0023 (Exhaust VVT oil control solenoid bank 1, 2) P0014, P0024 (Exhaust VVT system bank 1, 2 - advance) P0015, P0025 (Exhaust VVT system bank 1, 2 - retard) P0016, P0018 (VVT system bank 1, 2 - misalignment) P0017, P0019 (Exhaust VVT system bank 1, 2 - misalignment) P0031, P0032, P0051, P0052, P101D, P103D (Air fuel ratio sensor heater) P0087, P0088, P0191, P0192, P0193 (Fuel pressure sensor (for high pressure side)) P0101, P0102, P0103 (Mass air flow meter) P0117, P0118 (Engine coolant temperature sensor) P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient coolant temperature for closed loop fuel control) P014C, P014D, P014E, P014F, P015A, P015B, P015C, P015D, P2195, P2196, P2197, P2198, P2237, P2238, P2239, P2240, P2241, P2242, P2252, P2253, P2255, P2256 (Air fuel ratio sensor) P0201, P0202, P0203, P0204, P0205, P0206, P062D, P21CF, P21D0, P21D1, P21D2, P21D3, P21D4 (Fuel injector) P0335, P0337, P0338 (Crankshaft position sensor) P0340, P0342, P0343, P0345, P0347, P0348 (Camshaft position sensor) P0351 - P0356 (Igniter) P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust camshaft position sensor) P0500 (Vehicle speed sensor) P0657, P2102, P2103 (Throttle actuator) P107B, P107C, P107D (Fuel pressure sensor (for low pressure side)) P1235 (High pressure fuel pump circuit)
Air fuel ratio sensor status	Activated
Engine speed	1200 rpm or higher, and less than 2200 rpm
Engine coolant temperature	75°C (167°F) or higher
Atmospheric pressure	76 kPa(abs) [11 psi(abs)] or higher
Fuel system status	Closed loop
Engine load	45% or higher, and less than 70%

P11EC, P11ED, P11EE, P11EF, P11F0, P11F1, P219C, P219D, P219E, P219F, P21A0 and P21A1: Crankshaft Position Sensor Monitoring Method

Monitor runs whenever the following DTCs are not stored	P0010, P0020 (VVT oil control solenoid bank 1, 2) P0011, P0021 (VVT system bank 1, 2 - advance) P0012, P0022 (VVT system bank 1, 2 - retard) P0013, P0023 (Exhaust VVT oil control solenoid bank 1, 2) P0014, P0024 (Exhaust VVT system bank 1, 2 - advance) P0015, P0025 (Exhaust VVT system bank 1, 2 - retard) P0016, P0018 (VVT system bank 1, 2 - misalignment) P0017, P0019 (Exhaust VVT system bank 1, 2 - misalignment) P0087, P0088, P0191, P0192, P0193 (Fuel pressure sensor (for high pressure side)) P0101, P0102, P0103 (Mass air flow meter) P0112, P0113 (Intake air temperature sensor) P0117, P0118 (Engine coolant temperature sensor) P0121, P0122, P0123, P0222, P0223, P2135 (Throttle position sensor) P0125 (Insufficient coolant temperature for closed loop fuel control) P0201, P0202, P0203, P0204, P0205, P0206, P062D, P21CF, P21D0, P21D1, P21D2, P21D3, P21D4 (Fuel injector) P0327, P0328, P0332, P0333 (Knock control sensor) P0335, P0337, P0338 (Crankshaft position sensor) P0340, P0342, P0343, P0345, P0347, P0348 (VVT sensor) P0351 - P0356 (Igniter) P0365, P0367, P0368, P0390, P0392, P0393 (Exhaust VVT sensor) P0500 (Vehicle speed sensor) P0657, P2102, P2103 (Throttle actuator) P0705 (Shift lever position switch) P107B, P107C, P107D (Fuel pressure sensor (for low pressure side)) P1235 (High pressure fuel pump circuit)
Vehicle speed	Less than 3 km/h (1.875 mph)
Engine speed	450 rpm or higher, and less than 1100 rpm
Engine coolant temperature	75°C (167°F) or higher
Air fuel ratio sensor status	Activated
Fuel system status	Closed loop
Battery voltage	11 V or higher

TYPICAL MALFUNCTION THRESHOLDS

P11EA and P11EB: Air Fuel Ratio Sensor Monitoring Method

Air fuel ratio sensor monitoring method criteria (rich side imbalance for port injection)

1 or more

P11EC, P11ED, P11EE, P11EF, P11F0 and P11F1: Crankshaft Position Sensor Monitoring Method

Crankshaft position sensor monitoring method criteria (lean side imbalance for port injection)

1 or more

P219A and P219B: Air Fuel Ratio Sensor Monitoring Method

Air fuel ratio sensor monitoring method criteria (rich side imbalance for direct injection)

1 or more

P219C, P219D, P219E, P219F, P21A0 and P21A1: Crankshaft Position Sensor Monitoring Method

Crankshaft position sensor monitoring method criteria (lean side imbalance for direct injection)

1 or more

MONITOR RESULT

Refer to detailed information in Checking Monitor Status.

Click here

P11EA: Fuel System / A/F SENSOR DETERMINATION (Port) B1

Monitor ID	Test ID	Scaling	Unit	Description
$81	$96	Multiply by 0.001	No dimension	Monitoring method using air fuel ratio sensor (Port)

P11EB: Fuel System / A/F SENSOR DETERMINATION (Port) B2

Monitor ID	Test ID	Scaling	Unit	Description
$82	$96	Multiply by 0.001	No dimension	Monitoring method using air fuel ratio sensor (Port)

P11EC: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE (Port) #1

Monitor ID	Test ID	Scaling	Unit	Description
$81	$8D	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Port)

P11ED: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE (Port) #2

Monitor ID	Test ID	Scaling	Unit	Description
$82	$8E	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Port)

P11EE: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE (Port) #3

Monitor ID	Test ID	Scaling	Unit	Description
$81	$8F	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Port)

P11EF: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE (Port) #4

Monitor ID	Test ID	Scaling	Unit	Description
$82	$90	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Port)

P11F0: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE (Port) #5

Monitor ID	Test ID	Scaling	Unit	Description
$81	$91	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Port)

P11F1: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE (Port) #6

Monitor ID	Test ID	Scaling	Unit	Description
$82	$92	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Port)

P219A: Fuel System / A/F SENSOR DETERMINATION B1

Monitor ID	Test ID	Scaling	Unit	Description
$81	$95	Multiply by 0.001	No dimension	Monitoring method using air fuel ratio sensor (Direct)

P219B: Fuel System / A/F SENSOR DETERMINATION B2

Monitor ID	Test ID	Scaling	Unit	Description
$82	$95	Multiply by 0.001	No dimension	Monitoring method using air fuel ratio sensor for bank 2 (Direct)

P219C: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #1

Monitor ID	Test ID	Scaling	Unit	Description
$81	$85	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Direct)

P219D: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #2

Monitor ID	Test ID	Scaling	Unit	Description
$82	$86	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Direct)

P219E: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #3

Monitor ID	Test ID	Scaling	Unit	Description
$81	$87	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Direct)

P219F: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #4

Monitor ID	Test ID	Scaling	Unit	Description
$82	$88	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Direct)

P21A0: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #5

Monitor ID	Test ID	Scaling	Unit	Description
$81	$89	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Direct)

P21A1: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE #6

Monitor ID	Test ID	Scaling	Unit	Description
$82	$8A	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Direct)

CONFIRMATION DRIVING PATTERN

HINT:

After repair has been completed, clear the DTC and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
Click here
When clearing the permanent DTCs, refer to the "CLEAR PERMANENT DTC" procedure.
Click here

Connect the Techstream to the DLC3.
Turn the engine switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].
HINT:

The A/C switch and all accessory switches should be off and the shift lever should be in P.
Drive the vehicle at 60 km/h (37 mph) or higher for 2 minutes or more [B].
CAUTION:

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

HINT:

It is acceptable to turn electrical loads on while driving.
Idle the engine for 2 minutes or more [C].
HINT:

The A/C switch and all accessory switches should be off and the shift lever should be in P.
Enter the following menus: Powertrain / Engine / Trouble Codes [D].
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
- [A] to [D]: Normal judgment procedure.
  The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
Drive the vehicle at less than 30 km/h (19 mph) for 5 seconds or more [E].
CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Accelerate the vehicle from 30 to 60 km/h (19 to 37 mph) over a period of approximately 10 to 20 seconds.
CAUTION:

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

HINT:

Refer to the values of engine load and engine speed in Typical Enabling Conditions before accelerating the vehicle from 30 to 60 km/h (19 to 37 mph).
Drive the vehicle at 60 km/h (37 mph) or more for 5 seconds or more [F].
CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Drive the vehicle at less than 30 km/h (19 mph) for 5 seconds or more [G].
CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Accelerate the vehicle from 30 to 60 km/h (19 to 37 mph) over a period of approximately 10 to 20 seconds.
CAUTION:

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

HINT:

Refer to the values of engine load and engine speed in Typical Enabling Conditions before accelerating the vehicle from 30 to 60 km/h (19 to 37 mph).
Drive the vehicle at 60 km/h (37 mph) or more for 5 seconds or more [H].
CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Repeat steps [G] and [H] above at least 2 times [I].
Idle the engine for 1 minute or more [J].
HINT:

The A/C switch and all accessory switches should be off and the shift lever should be in P.
Enter the following menus: Powertrain / Engine / Trouble Codes [K].
Read the pending DTCs.
HINT:
- If a pending DTC is output, the system is malfunctioning.
- If a pending DTC is not output, perform the following procedure.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P11EA00, P11EB00, P11EC00, P11ED00, P11EE00, P11EF00, P11F000, P11F100, P219A00, P219B00, P219C00, P219D00, P219E00, P219F00, P21A000 or P21A100.

Check the DTC judgment 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

HINT:

If the judgment result is NORMAL, the system is normal.
If the judgment result is ABNORMAL, the system has a malfunction.
If the judgment result is INCOMPLETE, perform the confirmation driving pattern and check the judgment result again.
[A] to [K]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
When clearing the permanent DTCs, do not disconnect the cable from the battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.

CAUTION / NOTICE / HINT

HINT:

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.
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.
Whether malfunctions occur on the port injection side or direct injection side cannot be determined solely by the output DTCs. Inspect every suspected area even if it is not related to the DTCs.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. 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.

PROCEDURE

1.	CHECK ANY OTHER DTCS OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Enter the following menus: Powertrain / Engine / Trouble Codes.

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTC P11EA00, P11EB00, P11EC00, P11ED00, P11EE00, P11EF00, P11F000, P11F100, P219A00, P219B00, P219C00, P219D00, P219E00, P219F00, P21A000 and/or P21A100 are output	A
DTC P11EA00, P11EB00, P11EC00, P11ED00, P11EE00, P11EF00, P11F000, P11F100, P219A00, P219B00, P219C00, P219D00, P219E00, P219F00, P21A000 and/or P21A100 and other DTCs are output	B

HINT:

If any DTCs other than DTC P11EA00, P11EB00, P11EC00, P11ED00, P11EE00, P11EF00, P11F000, P11F100, P219A00, P219B00, P219C00, P219D00, P219E00, P219F00, P21A000 and/or P21A100 are output, troubleshoot those DTCs first.

GO TO DTC CHART

2.	READ VALUE USING TECHSTREAM (FREEZE FRAME DATA)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Using the Techstream, 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 P11EA00, P11EB00, P11EC00, P11ED00, P11EE00, P11EF00, P11F000, P11F100, P219A00, P219B00, P219C00, P219D00, P219E00, P219F00, P21A000 or P21A100

Vehicle Speed
Engine Speed
Calculate Load
Accelerator Position
Short FT B1S1 or B2S1
Long FT B1S1 or B2S1
Misfire Count Cylinder #1 to #6

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 (P11EA00, P11EB00, P219A00 and P219B00)	Crankshaft Position Sensor Monitoring Method (P11EC00, P11ED00, P11EE00, P11EF00, P11F000, P11F100, P219C00, P219D00, P219E00, P219F00, P21A000 and P21A100)	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 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.

3.	READ DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

HINT:

If any misfire count (Misfire Count Cylinder #1 to #6) 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.

(e) Enter the following menus: Powertrain / Engine / Trouble Codes.

(f) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result	Proceed to
P11EA00, P11EB00, P219A00 or P219B00 is output	A
DTC P219A00 or P219B00, and P219C00, P219D00, P219E00, P219F00, P21A000 or P21A100 are output	B
DTC P11EA00 or P11EB00, and P11EC00, P11ED00, P11EE00, P11EF00, P11F000 or P11F100 are output
DTC P11EC00, P11ED00, P11EE00, P11EF00, P11F000, P11F100, P219C00, P219D00, P219E00, P219F00, P21A00 and/or P21A100 are output

GO TO STEP 6

4.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE INJECTION VOLUME)

(a) Connect the Techstream to the DLC3.

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

HINT:

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

(d) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume / Data List / Coolant Temperature and Misfire Count Cylinder #1 to #6.

Powertrain > Engine > Active Test

Active Test Display
Control the Injection Volume

Data List Display
Coolant Temperature
Misfire Count Cylinder #1
Misfire Count Cylinder #2
Misfire Count Cylinder #3
Misfire Count Cylinder #4
Misfire Count Cylinder #5
Misfire Count Cylinder #6

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).

(e) Perform the Control the Injection Volume operation with the engine idling.

(f) Check the misfire counts (Misfire Count Cylinder #1 to #6) while decreasing the injection volume in 5% increments.

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

5.	CHECK FOR EXHAUST GAS LEAK

(a) Check for exhaust gas leak.

OK:

No gas leaks in exhaust system.

HINT:

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

Click here

REPAIR OR REPLACE EXHAUST SYSTEM

6.	CHECK INTAKE SYSTEM

(a) Check the intake system for vacuum leaks.

Click here

OK:

No leaks in the intake system.

HINT:

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

Click here

REPAIR OR REPLACE INTAKE SYSTEM

7.	INSPECT SPARK PLUG

(a) Inspect the spark plug of the cylinder causing the imbalance.

Click here

HINT:

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

Click here

REPLACE SPARK PLUG

8.	CHECK FOR SPARK (SPARK TEST)

(a) Perform a spark test.

Click here

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.
Click here

9.	CHECK CYLINDER COMPRESSION PRESSURE

(a) Measure the cylinder compression pressure of the misfiring cylinder.

Click here

HINT:

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

Click here

CHECK ENGINE TO DETERMINE CAUSE OF LOW COMPRESSION

10.	CHECK FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION) OF CYLINDER CAUSING IMBALANCE

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

Click here

HINT:

Perform "Inspection After Repair" after replacing the fuel injector assembly (for port injection).

Click here

REPLACE FUEL INJECTOR ASSEMBLY (FOR PORT INJECTION)

11.	CHECK FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION) OF CYLINDER CAUSING IMBALANCE

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

Click here

HINT:

Perform "Inspection After Repair" after replacing the fuel injector assembly (for direct injection).

Click here

REPLACE FUEL INJECTOR ASSEMBLY (FOR DIRECT INJECTION)

12.	CHECK FOR CAUSE OF FAILURE

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

(b) 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.

13.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(d) Clear the DTC.

Powertrain > Engine > Clear DTCs

(e) Turn the engine switch off and wait for at least 30 seconds.

14.	CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

(a) Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.

(b) Enter the following menus: Powertrain / Engine / Trouble Codes.

Powertrain > Engine > Trouble Codes

DTCs are not output.

END

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