Toyota Avalon (XX50): Low Pressure Fuel System Pressure - Too High (P008B00). Bank 1 Air-Fuel Ratio Imbalance (Port) (P11EA00,P11EC00-P11EF00,P219A00,P219C00-P219F00). Engine Coolant Temperature/Engine Oil Temperature Sign

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / A25a-fxs Engine Control / Sfi System / Low Pressure Fuel System Pressure - Too High (P008B00). Bank 1 Air-Fuel Ratio Imbalance (Port) (P11EA00,P11EC00-P11EF00,P219A00,P219C00-P219F00). Engine Coolant Temperature/Engine Oil Temperature Sign

Low Pressure Fuel System Pressure - Too High (P008B00)

DESCRIPTION

Refer to DTC P008A00.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P008B00	Low Pressure Fuel System Pressure - Too High	The actual fuel pressure (for low pressure side) value is higher than target fuel pressure (for low pressure side) by a certain amount or more (1 trip detection logic).	Fuel pump control ECU Fuel pressure sensor (for low pressure side) ECM	Does not come on	DTC stored	SAE Code: P008B

MONITOR DESCRIPTION

If the fuel pressure (for low pressure side) increases despite a decrease request signal being sent to the fuel pump control ECU by the ECM, the ECM will store this DTC.

MONITOR STRATEGY

Frequency of Operation

Continuous

CONFIRMATION DRIVING PATTERN

Connect the Techstream to the DLC3.
Turn the power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off and wait for at least 30 seconds.
Turn the power switch on (IG) [A].
Turn the Techstream on.
Put the engine in Inspection Mode (Maintenance Mode).
Click here
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [B].
With the engine running, drive the vehicle for 15 minutes or more [C].
CAUTION:

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

HINT:

If the engine stops, further depress the accelerator pedal to restart the engine.
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.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P008B00.

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 steps [B] through [D] again.

CAUTION / NOTICE / HINT

NOTICE:

Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
Click here

(Select Powertrain in Health Check and then check the time stamp data.)

Click here
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Click here

HINT:

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 OTHER DTCS OUTPUT (IN ADDITION TO DTC P008B00)

(a) Connect the Techstream to the DLC3.

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

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

(e) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTC P008B00 is output	A
DTC P008B00 and other DTCs are output	B

HINT:

If any DTCs other than P008B00 are output, troubleshoot those DTCs first.

GO TO DTC CHART

2.	READ VALUE USING TECHSTREAM (FUEL PRESSURE (LOW))

(a) Connect the Techstream to the DLC3.

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

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

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(e) Start the engine.

(f) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low).

Powertrain > Engine > Data List

Tester Display
Fuel Pressure (Low)

(g) Record the Fuel Pressure (Low) value.

(h) Turn the power switch off.

(i) Discharge the fuel pressure.

HINT:

DTCs may be stored during this inspection. Check for DTCs and clear them using the Techstream.

(1) Remove the EFI-MAIN NO. 2 fuse from the No. 1 engine room relay block and No. 1 junction block assembly.

(2) Turn the power switch on (IG).

(3) Turn the Techstream on.

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

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(5) Start the engine.

(6) After the engine has stopped on its own, turn the power switch off.

HINT:

If the engine does not stop naturally, perform direct injection by racing the engine to reduce the fuel pressure [Fuel Pressure (High)] and stop the engine.

(7) Turn the power switch on (IG).

(8) Turn the Techstream on.

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

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(10) Crank the engine again and make sure that the engine does not start.

(11) Install the EFI-MAIN NO. 2 fuse.

(j) Enter the following menus: Powertrain / Engine / Data List / Fuel Pressure (Low).

Powertrain > Engine > Data List

Tester Display
Fuel Pressure (Low)

(k) Compare the Fuel Pressure (Low) value recorded with the engine running to the Fuel Pressure (Low) value currently shown on the Techstream.

Result	Proceed to
Fuel Pressure (Low) value drops	A
Fuel Pressure (Low) value is maintained	B

HINT:

Perform "Inspection After Repair" after replacing the fuel pressure sensor (for low pressure side).

Click here

REPLACE FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

3.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO)

(a) Install the fuel pressure gauge (for low pressure side).

Click here

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio / Data List / Fuel Pressure (Low).

Powertrain > Engine > Active Test

Active Test Display
Control the Fuel Pump Duty Ratio

Data List Display
Fuel Pressure (Low)

(f) Compare the values in the Data List using the Techstream and the fuel pressure gauge when the Active Test was performed.

Standard:

Techstream Operation	Standard
Low	Data List value and fuel pressure gauge are within +/-50 kPa of each other
High

HINT:

Perform "Inspection After Repair" after replacing the fuel pressure sensor (for low pressure side).

Click here

REPLACE FUEL PRESSURE SENSOR (FOR LOW PRESSURE SIDE)

4.	PERFORM ACTIVE TEST USING TECHSTREAM (CONTROL THE FUEL PUMP DUTY RATIO)

(a) Install the fuel pressure gauge (for low pressure side).

Click here

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Enter the following menus: Powertrain / Engine / Active Test / Control the Fuel Pump Duty Ratio / Data List / Fuel Pressure (Low).

Powertrain > Engine > Active Test

Active Test Display
Control the Fuel Pump Duty Ratio

Data List Display
Fuel Pressure (Low)

(f) Read the values on the Data List and the fuel pressure gauge when the Active Test was performed.

Techstream Operation	Fuel Pressure (Low)	Fuel pressure gauge	Proceed to
Low	Below 600 kPa	Below 600 kPa (6.1 kgf/cm2, 87 psi)	A
Low	600 kPa or higher	600 kPa (6.1 kgf/cm2, 87 psi) or higher	B

REPLACE FUEL PUMP CONTROL ECU

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

6.	CHECK WHETHER DTC OUTPUT RECURS (DTC P008B00)

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

(b) Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display
All Readiness

(d) Check the DTC judgment result.

Result	Proceed to
NORMAL (DTCs are not output)	A
ABNORMAL (DTC P008B00 is output)	B

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P008B00 is output)

CHECK FOR INTERMITTENT PROBLEMS

REPLACE ECM

Bank 1 Air-Fuel Ratio Imbalance (Port) (P11EA00,P11EC00-P11EF00,P219A00,P219C00-P219F00)

DESCRIPTION

Refer to DTC P003012.

Click here

Refer to DTC P030000.

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).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (sensor 1) ECM	Comes on	DTC stored	SAE Code: P11EA
P11EC00	Cylinder #1 Air-Fuel Ratio Imbalance (Port)	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (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).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (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).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (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).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (sensor 1) ECM	Comes on	DTC stored	SAE Code: P11EF
P219A00	Bank 1 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (sensor 1) ECM	Comes on	DTC stored	SAE Code: P219A
P219C00	Cylinder 1 Air-Fuel Ratio Imbalance	The difference in air fuel ratios between the cylinders exceeds the threshold (2 trip detection logic).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (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).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (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).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (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).	Port fuel injector assembly Direct fuel injector assembly Intake system Gas leaks from exhaust system Ignition system Compression pressure Air fuel ratio sensor (sensor 1) ECM	Comes on	DTC stored	SAE Code: P219F

MONITOR DESCRIPTION

Fuel System Air Fuel Ratio Cylinder Imbalance Monitor

The ECM uses the air fuel ratio sensor (sensor 1) 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 (Sensor 1) Monitoring Method: P11EA00 (for port injection), or P219A00 (for direct injection) is 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 (sensor 1) output over 1 engine cycle (2 crankshaft revolutions), the system determines that there is a problem.

Crankshaft Position Sensor Monitoring Method: P11EC00, P11ED00, P11EE00 and/or P11EF00 (for port injection), or P219C00, P219D00, P219E00 and/or P219F00 (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) 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) P219A: Air fuel ratio cylinder imbalance monitor (for direct injection of bank 1) 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)
Required Sensors/Components (Main)	Air fuel ratio sensor (sensor 1) 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 (sensor 1) monitoring method 10 to 15 seconds: Crankshaft position sensor monitoring method
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

P11EA and P219A: Air Fuel Ratio Sensor (Sensor 1) Monitoring Method

Monitor runs whenever the following DTCs are not stored

P0010, P1360, P1362, P1364, P1366, P2614 (Motor drive VVT system control module)

P0011 (VVT system - advance)

P0012 (VVT system - retard)

P0013 (Exhaust VVT oil control solenoid)

P0014 (Exhaust VVT system - advance)

P0015 (Exhaust VVT system - retard)

P0016 (VVT system - misalignment)

P0017 (Exhaust VVT system - misalignment)

P0031, P0032, P101D (Air fuel ratio sensor (sensor 1) heater)

P0087, P0088, P0191, P0192, P0193 (Fuel pressure sensor (for high pressure side))

P0101, P0102, P0103 (Mass air flow meter)

P0107, P0108 (Manifold absolute pressure)

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, P015A, P015B, P2195, P2196, P2237, P2238, P2239, P2252, P2253 (Air fuel ratio sensor (sensor 1))

P0201, P0202, P0203, P0204, P062D, P21CF, P21D0, P21D1, P21D2 (Fuel injector)

P0335, P0337, P0338 (Crankshaft position sensor)

P0340, P0342, P0343 (Camshaft position sensor)

P0365, P0367, P0368 (Exhaust camshaft position sensor)

P0401 (EGR system (closed))

P0657, P0658, P2102, P2103 (Throttle actuator)

P107B, P107C, P107D (Fuel pressure sensor (for low pressure side))

P1235 (High pressure fuel pump circuit)

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

Monitor runs whenever the following DTCs are not stored

P0010, P1360, P1362, P1364, P1366, P2614 (Motor drive VVT system control module)

P0011 (VVT system - advance)

P0012 (VVT system - retard)

P0013 (Exhaust VVT oil control solenoid)

P0014 (Exhaust VVT system - advance)

P0015 (Exhaust VVT system - retard)

P0016 (VVT system - misalignment)

P0017 (Exhaust VVT system - misalignment)

P0087, P0088, P0191, P0192, P0193 (Fuel pressure sensor (for high pressure side))

P0101, P0102, P0103 (Mass air flow meter)

P0107, P0108 (Manifold absolute pressure)

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, P062D, P21CF, P21D0, P21D1, P21D2 (Fuel injector)

P0327, P0328 (Knock control sensor)

P0335, P0337, P0338 (Crankshaft position sensor)

P0340, P0342, P0343 (Camshaft position sensor)

P0365, P0367, P0368 (Exhaust camshaft position sensor)

P0401 (EGR system (closed))

P0657, P0658, P2102, P2103 (Throttle actuator)

P107B, P107C, P107D (Fuel pressure sensor (for low pressure side))

P1235 (High pressure fuel pump circuit)

P11EA: Air Fuel Ratio Sensor (Sensor 1) Monitoring Method

Air fuel ratio sensor (sensor 1) status	Activated
Engine speed	1400 rpm or higher, and less than 2600 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	40% or higher, and less than 70%

P11EC, P11ED, P11EE, P11EF, P219C, P219D, P219E and P219F: Crankshaft Position Sensor Monitoring Method (First Judgment)

Engine speed	1400 rpm or higher, and less than 2400 rpm
Engine coolant temperature	75°C (167°F) or higher
Air fuel ratio sensor (sensor 1) status	Activated
Fuel system status	Closed loop
Auxiliary battery voltage	11 V or higher

P11EC, P11ED, P11EE, P11EF, P219C, P219D, P219E and P219F: Crankshaft Position Sensor Monitoring Method (Second Judgment)

Vehicle speed	Less than 3 km/h (1.875 mph)
Engine speed	1050 rpm or higher, and less than 1350 rpm
Engine coolant temperature	75°C (167°F) or higher
Air fuel ratio sensor (sensor 1) status	Activated
Fuel system status	Closed loop
Auxiliary battery voltage	11 V or higher

P219A: Air Fuel Ratio Sensor (Sensor 1) Monitoring Method

Air fuel ratio sensor (sensor 1) status	Activated
Engine speed	1400 rpm or higher, and less than 2400 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	40% or higher, and less than 70%

TYPICAL MALFUNCTION THRESHOLDS

P11EA: Air Fuel Ratio Sensor (Sensor 1) Monitoring Method

Air fuel ratio sensor (sensor 1) monitoring method criteria (rich side imbalance for port injection)

1 or more

P11EC, P11ED, P11EE and P11EF: Crankshaft Position Sensor Monitoring Method (First Judgment)

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

1.5 or more

P11EC, P11ED, P11EE and P11EF: Crankshaft Position Sensor Monitoring Method (Second Judgment)

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

1 or more

P219A: Air Fuel Ratio Sensor (Sensor 1) Monitoring Method

Air fuel ratio sensor (sensor 1) monitoring method criteria (rich side imbalance for direct injection)

1 or more

P219C, P219D, P219E and P219F: Crankshaft Position Sensor Monitoring Method (First Judgment)

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

1.5 or more

P219C, P219D, P219E and P219F: Crankshaft Position Sensor Monitoring Method (Second Judgment)

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

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 (sensor 1) (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
$81	$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
$81	$90	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Port)

P219A: Fuel System / A/F SENSOR DETERMINATION (Direct) B1

Monitor ID	Test ID	Scaling	Unit	Description
$81	$95	Multiply by 0.001	No dimension	Monitoring method using air fuel ratio sensor (sensor 1) (Direct)

P219C: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE (Direct) #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 (Direct) #2

Monitor ID	Test ID	Scaling	Unit	Description
$81	$86	Multiply by 0.001	No dimension	Monitoring method using crank angle sensor (Direct)

P219E: Fuel System / ENGINE SPEED FLUCTUATION AVERAGE (Direct) #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 (Direct) #4

Monitor ID	Test ID	Scaling	Unit	Description
$81	$88	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 power switch on (IG).
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Put the engine in Inspection Mode (Maintenance Mode).
Click here
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].
With the engine running, drive the vehicle at 40 km/h (25 mph) or higher.
CAUTION:

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

HINT:

If the engine stops, further depress the accelerator pedal to restart the engine.
With the engine running, gradually accelerate the vehicle from 40 km/h (25 mph) to 80 km/h (50 mph) taking approximately 10 to 20 seconds [B].
CAUTION:

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

HINT:
- Refer to engine load and engine speed in Typical Enabling Conditions, and then accelerate the vehicle to 80 km/h (50 mph).
- If the engine stops, further depress the accelerator pedal to restart the engine.
With the engine running, drive the vehicle at 80 km/h (50 mph) or more for 1 minute or more [C].
CAUTION:

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

HINT:
- Electrical load can be applied while the vehicle is driven.
- If the engine stops, further depress the accelerator pedal to restart the engine.
Idle the engine for 1 minute or more [D].
HINT:

Perform this step with the shift lever in D.
Repeat steps [B] and [D] above at least 3 times [E].
Enter the following menus: Powertrain / Engine / Trouble Codes [F].
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 [F]: 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 auxiliary battery terminal or attempt to clear the DTCs during this procedure, as doing so will clear the universal trip and normal judgment histories.
With the engine running, drive the vehicle at 80 km/h (50 mph).
CAUTION:

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

HINT:

If the engine stops, further depress the accelerator pedal to restart the engine.
With the engine running, gradually accelerate the vehicle from 80 km/h (50 mph) to 100 km/h (62 mph) taking approximately 5 to 15 seconds [G].
CAUTION:

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

HINT:
- Refer to engine load and engine speed in Typical Enabling Conditions, and then accelerate the vehicle to 100 km/h (62 mph).
- If the engine stops, further depress the accelerator pedal to restart the engine.
With the engine running, drive the vehicle at 100 km/h (62 mph) or more for 1 minute or more [H].
CAUTION:

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

HINT:
- Electrical load can be applied while the vehicle is driven.
- If the engine stops, further depress the accelerator pedal to restart the engine.
Idle the engine for 1 minute or more [I].
HINT:

Perform this step with the shift lever in D.
Repeat steps [G] and [I] above at least 2 times [J].
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, P11EC00, P11ED00, P11EE00, P11EF00, P11F000, P219A00, P219C00, P219D00, P219E00 or P219F00.

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 shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system has a malfunction.
If the judgment result shows 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 auxiliary 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

NOTICE:

Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
Click here

(Select Powertrain in Health Check and then check the time stamp data.)

Click here
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Click here

HINT:

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 power 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, P11EC00, P11ED00, P11EE00, P11EF00, P219A00, P219C00, P219D00, P219E00 and/or P219F00 is output	A
DTC P11EA00, P11EC00, P11ED00, P11EE00, P11EF00, P219A00, P219C00, P219D00, P219E00 and/or P219F00 and other DTCs are output	B

HINT:

If any DTCs other than DTC P11EA00, P11EC00, P11ED00, P11EE00, P11EF00, P219A00, P219C00, P219D00, P219E00 and/or P219F00 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 power 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, P11EC00, P11ED00, P11EE00, P11EF00, P219A00, P219C00, P219D00, P219E00 or P219F00

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 (P11EA00 and P219A00)	Crankshaft Position Sensor Monitoring Method (P11EC00, P11ED00, P11EE00, P11EF00, P219C00, P219D00, P219E00 and P219F00)	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.

3.	READ DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the power 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 #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.

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

(f) Read the DTCs.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTC P11EA00 or P219A00 is output	A
DTC P219A00 and P219C00, P219D00, P219E00 or P219F00 is output	B
DTC P11EA00 and P11EC00, P11ED00, P11EE00 or P11EF00 is output
DTC P11EC00, P11ED00, P11EE00, P11EF00, P219C00, P219D00, P219E00 and/or P219F00 is output

GO TO STEP 6

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

(a) Connect the Techstream to the DLC3.

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

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

Powertrain > Hybrid Control > Utility

Tester Display
Inspection Mode

(e) 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 or N.

(f) Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume / Data List / Coolant Temperature and Misfire Count Cylinder #1 to #4.

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

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).

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

(h) Check the misfire counts (Misfire Count Cylinder #1 to #4) 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 PORT FUEL INJECTOR ASSEMBLY OF CYLINDER CAUSING IMBALANCE

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

Click here

HINT:

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

Click here

REPLACE PORT FUEL INJECTOR ASSEMBLY

11.	CHECK DIRECT FUEL INJECTOR ASSEMBLY OF CYLINDER CAUSING IMBALANCE

(a) Check the direct fuel injector assembly.

Click here

HINT:

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

Click here

REPLACE DIRECT FUEL INJECTOR ASSEMBLY

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 power switch on (IG).

(d) Clear the DTCs.

Powertrain > Engine > Clear DTCs

(e) Turn the power 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

Engine Coolant Temperature/Engine Oil Temperature Signal Compare Failure (P012F62)

DESCRIPTION

The engine is equipped with an engine coolant temperature sensor and an engine oil temperature sensor. The engine coolant temperature sensor and engine oil temperature sensor each have a built-in thermistor. As the temperature decreases, the thermistor resistance increases and as the temperature increases, the thermistor resistance decreases. The voltages at the respective terminals of the ECM change in accordance with the changes in the resistance of the thermistors. The ECM performs control based on these voltages.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P012F62

Engine Coolant Temperature/Engine Oil Temperature Signal Compare Failure

All of the following conditions are met (2 trip detection logic):

The auxiliary battery voltage is higher than 8 V.
5 hours or more have elapsed since the engine stopped on the previous trip.
The engine oil temperature is -10°C (14°F) or higher.
The engine coolant temperature is -10°C (14°F) or higher.
The difference between the readings of the engine coolant temperature and engine oil temperature is higher than 20°C (36°F).

Engine coolant temperature sensor
Engine oil temperature sensor
ECM

Comes on

DTC stored

SAE Code: P012F

MONITOR DESCRIPTION

After the engine has stopped for 5 hours or more, the ECM monitors the voltage of the engine coolant temperature sensor and engine oil temperature sensor. If the difference between the readings of the engine coolant temperature and engine oil temperature is higher than 20°C (36°F), the ECM determines that there is a malfunction in the engine coolant temperature sensor circuit or engine oil temperature sensor circuit, and stores a DTC and illuminates the MIL.

MONITOR STRATEGY

Related DTCs	P012F: Engine coolant temperature sensor / Engine oil temperature sensor rationality
Required Sensors/Components (Main)	Engine coolant temperature sensor Engine oil temperature sensor
Required Sensors/Components (Related)	-
Frequency of Operation	Once per driving cycle
Duration	Within 60 seconds
MIL Operation	2 driving cycles
Sequence of Operation	None

TYPICAL ENABLING CONDITIONS

All of the following conditions are met	-
Time after power switch off	5 hours or more
Engine coolant temperature	-10°C (14°F) or higher
Engine oil temperature	-10°C (14°F) or higher
Time after ECM started by soak timer	0.5 seconds or more
Power switch	Off
Auxiliary battery voltage	Higher than 8 V
Engine coolant temperature sensor circuit fail (P0117, P0118)	Not detected
Engine oil temperature sensor circuit fail (P0197, P0198)	Not detected
Soak timer fail (P2610)	Not detected

TYPICAL MALFUNCTION THRESHOLDS

Deviated engine coolant temperature and engine oil temperature

Less than -20°C (-36°F), or higher than 20°C (36°F)

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 power switch on (IG) [A].
Turn the Techstream on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the power switch off.
With the engine stopped, leave the vehicle as is for 5.5 hours or more [B].
Turn the power switch on (IG) [C].
Turn the Techstream on.
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.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.
Input the DTC: P012F62.

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 is malfunctioning.
If the judgment result is INCOMPLETE, perform steps [B] through [D] again.
[B] 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 auxiliary 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

NOTICE:

Vehicle Control History may be stored in the hybrid vehicle control ECU assembly if the engine is malfunctioning. Certain vehicle condition information is recorded when Vehicle Control History is stored. Reading the vehicle conditions recorded in both the Freeze Frame Data and Vehicle Control History can be useful for troubleshooting.
Click here

(Select Powertrain in Health Check and then check the time stamp data.)

Click here
If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU assembly, make sure to clear it. However, as all Vehicle Control History items are cleared simultaneously, if any Vehicle Control History items other than "Engine Malfunction" are stored, make sure to perform any troubleshooting for them before clearing Vehicle Control History.
Click here

HINT:

PROCEDURE

1.	CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P012F62)

(a) Connect the Techstream to the DLC3.

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

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

(e) Read the DTCs and record the Freeze Frame Data.

Powertrain > Engine > Trouble Codes

Result	Proceed to
DTC P012F62 is output	A
DTC P012F62 and other DTCs are output	B

HINT:

If any DTCs other than P012F62 are output, troubleshoot those DTCs first.

GO TO DTC CHART

2.	CHECK FREEZE FRAME DATA (COOLANT TEMPERATURE AND INTAKE AIR TEMPERATURE)

(a) Connect the Techstream to the DLC3.

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

(d) Using the Techstream, read the values displayed in the Freeze Frame Data recorded in step 1.

Powertrain > Engine > DTC(P012F62) > Freeze Frame Data

Tester Display
Coolant Temperature
Intake Air Temperature

(e) Read the value displayed on the Techstream.

Standard:

Techstream Display	Specified Condition
Difference between the Coolant Temperature and the Intake Air Temperature	Within 15°C (27°F)

HINT:

When the engine is cold, the value of the engine coolant temperature, engine oil temperature and intake air temperature should be approximately the same.
If the result is not as specified, check that there are no heat sources such as a block heater in the engine compartment.
Perform "Inspection After Repair" after replacing the engine coolant temperature sensor.
Click here

REPLACE ENGINE COOLANT TEMPERATURE SENSOR

3.	CHECK FREEZE FRAME DATA (ENGINE OIL TEMPERATURE SENSOR AND INTAKE AIR TEMPERATURE)

(a) Connect the Techstream to the DLC3.

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

(d) Using the Techstream, read the values displayed in the freeze frame data recorded in step 1.

Powertrain > Engine > DTC(P012F62) > Freeze Frame Data

Tester Display
Engine Oil Temperature Sensor
Intake Air Temperature

(e) Read the value displayed on the Techstream.

Standard:

Techstream Display	Specified Condition
Difference between the Engine Oil Temperature Sensor and the Intake Air Temperature	Within 15°C (27°F)

HINT:

When the engine is cold, the value of the engine coolant temperature, engine oil temperature and intake air temperature should be approximately the same.

REPLACE ECM

REPLACE ENGINE OIL TEMPERATURE SENSOR

Control Module Internal Temperature Sensor "B" Circuit Short to Ground (P06AB11,P06AB15). Engine Oil Pressure Control Circuit Open (P06DA13). Low Pressure Fuel System Pressure - Too Low (P008A00)

Fuel Pump Control (All Phase) Circuit Open (P12D013-P12D313). Fuel Pump Control Circuit Current Out of Range (P12D41D). Fuel Pump Control General Electrical Failure (P12D501)

See More:

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Sfi System: Fuel Rail Pressure Sensor (Low) Circuit Short to Ground (P107A11). Fuel Rail Pressure Sensor (Low) Circuit Short to Battery or Open (P107A15). A Camshaft Position Actuator Bank 1 Circuit Open (P001013
Fuel Rail Pressure Sensor (Low) Circuit Short to Ground (P107A11) DESCRIPTION The fuel pressure sensor (for low pressure side) replaces the fuel pressure with electrical signals and outputs them to the ECM. The ECM controls the optimal fuel pressure for the operation conditions to reduce the fuel pu ...