SFI SYSTEM(w/o Canister Pump Module), Diagnostic DTC:P013616, P015616

DTC Code	DTC Name
P013616	A/F (O2) Sensor Circuit Bank 1 Sensor 2 Circuit Current (Voltage) Below Threshold
P015616	A/F (O2) Sensor Circuit Bank 2 Sensor 2 Circuit Current (Voltage) Below Threshold

DESCRIPTION

Refer to DTC P003612.

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DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P013616	A/F (O2) Sensor Circuit Bank 1 Sensor 2 Circuit Current (Voltage) Below Threshold	Either of the following conditions is met (2 trip detection logic). During active rich air-fuel ratio control, the air fuel ratio sensor (bank 1 sensor 2) current is 6 mA or higher During active rich air-fuel ratio control, the oxygen storage capacity of the catalyst is higher than 1.8 g when the air fuel ratio sensor (bank 1 sensor 2) current is -0.25757 mA or higher	Air fuel ratio sensor (bank 1 sensor 2) Air fuel ratio sensor (bank 1 sensor 1) Gas leak from exhaust system EGR valve assembly Fuel system Intake system	Comes on	DTC stored	SAE: P0136
P015616	A/F (O2) Sensor Circuit Bank 2 Sensor 2 Circuit Current (Voltage) Below Threshold	Either of the following conditions is met (2 trip detection logic). During active rich air-fuel ratio control, the air fuel ratio sensor (bank 2 sensor 2) current is 6 mA or higher During active rich air-fuel ratio control, the oxygen storage capacity of the catalyst is higher than 1.8 g when the air fuel ratio sensor (bank 2 sensor 2) current is -0.25757 mA or higher	Air fuel ratio sensor (bank 2 sensor 2) Air fuel ratio sensor (bank 2 sensor 1) Gas leak from exhaust system EGR valve assembly Fuel system Intake system	Comes on	DTC stored	SAE: P0156

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

Note

P013616

A/F (O2) Sensor Circuit Bank 1 Sensor 2 Circuit Current (Voltage) Below Threshold

Either of the following conditions is met (2 trip detection logic).

During active rich air-fuel ratio control, the air fuel ratio sensor (bank 1 sensor 2) current is 6 mA or higher
During active rich air-fuel ratio control, the oxygen storage capacity of the catalyst is higher than 1.8 g when the air fuel ratio sensor (bank 1 sensor 2) current is -0.25757 mA or higher

Air fuel ratio sensor (bank 1 sensor 2)
Air fuel ratio sensor (bank 1 sensor 1)
Gas leak from exhaust system
EGR valve assembly
Fuel system
Intake system

Comes on

DTC stored

SAE: P0136

P015616

A/F (O2) Sensor Circuit Bank 2 Sensor 2 Circuit Current (Voltage) Below Threshold

Either of the following conditions is met (2 trip detection logic).

During active rich air-fuel ratio control, the air fuel ratio sensor (bank 2 sensor 2) current is 6 mA or higher
During active rich air-fuel ratio control, the oxygen storage capacity of the catalyst is higher than 1.8 g when the air fuel ratio sensor (bank 2 sensor 2) current is -0.25757 mA or higher

Air fuel ratio sensor (bank 2 sensor 2)
Air fuel ratio sensor (bank 2 sensor 1)
Gas leak from exhaust system
EGR valve assembly
Fuel system
Intake system

Comes on

DTC stored

SAE: P0156

MONITOR DESCRIPTION

Active Air fuel Ratio Control

The ECM usually performs air fuel ratio feedback control so that the air fuel ratio sensor output indicates a near stoichiometric air fuel ratio. This vehicle includes active air fuel ratio control in addition to regular air fuel ratio control. The ECM performs active air fuel ratio control to detect any deterioration in the Three-Way Catalytic Converter (TWC) and any malfunctions of the air fuel ratio sensor (sensor 2) (refer to the diagram below).

Active air fuel ratio control is performed for approximately 30 seconds while driving with a warm engine. During active air fuel ratio control, the air fuel ratio is forcibly regulated to become lean or rich by the ECM. If the ECM detects a malfunction, a DTC is stored.
Abnormal Air Fuel Ratio Sensor (sensor 2) Output Current (DTC P013616 and P015616)

Case 1: The ECM illuminates the MIL and stores a DTC when active rich air-fuel ratio control is being performed and the air fuel ratio sensor (sensor 2) current is 6 mA or higher.

Case 2: The ECM illuminates the MIL and stores a DTC when active rich air-fuel ratio control is being performed, the oxygen storage capacity of the catalyst is higher than 1.8 g and the air fuel ratio sensor (sensor 2) current is -0.25757 mA or higher.

MONITOR STRATEGY

Required Sensors/Components (Main)

Air fuel ratio sensor (sensor 2)

Required Sensors/Components (Related)

Crankshaft position sensor

Engine coolant temperature sensor

Mass air flow meter sub-assembly

Throttle position sensor

Air fuel ratio sensor (sensor 1)

Frequency of Operation

Once per driving cycle

TYPICAL ENABLING CONDITIONS

Auxiliary battery voltage	11 V or higher
Intake air temperature	-10°C (14°F) or higher
Engine coolant temperature	75°C (167°F) or higher
Atmospheric pressure	76 kPa(abs) [11.02 psi(abs)] or higher
Idling	Off
Engine speed	Less than 4000 rpm
Air fuel ratio sensor (sensor 1) status	Activated
Fuel system status	Closed loop
Engine load	10% or higher, and less than 90%

TYPICAL MALFUNCTION THRESHOLDS

Both of the following conditions are met	A and B
A. Continuous time of active rich air fuel ratio control*1	0.5 seconds or more
*1: Target air fuel ratio	13.7 or less
B. Either of the following conditions is met	(a) or (b)
(a) Air fuel ratio sensor (sensor 2) current	6.001 mA or higher
(b) OSC (Oxygen Storage Capacity) of catalyst	More than 1.8 g

CONFIRMATION DRIVING PATTERN

Tech Tips

This confirmation driving pattern is used for the "Perform Confirmation Driving Pattern" procedure of the following diagnostic troubleshooting procedure.
Performing this confirmation driving pattern will activate the air fuel ratio sensor (sensor 2) monitor (the catalyst monitor is performed simultaneously). This is very useful for verifying the completion of a repair.

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS 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 GTS on.
Put the engine in Inspection Mode (2WD for measuring Exhaust Gas).

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Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher [B].
With the engine running, drive the vehicle at 75 to 100 km/h (46 to 62 mph) for 10 minutes or more [C].

CAUTION:

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

Tech Tips

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.
Tech Tips
- 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: P013616 or P015616.

Check the DTC judgment result.

GTS 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

Tech Tips

If the judgment result shows NORMAL, the system is normal.
If the judgment result shows ABNORMAL, the system is malfunctioning.
If the judgment result shows INCOMPLETE, perform steps [C] and [D] again.

WIRING DIAGRAM

Refer to DTC P003612.

Click here

CAUTION / NOTICE / HINT

Note

Vehicle Control History may be stored in the hybrid vehicle control ECU 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.

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

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If any "Engine Malfunction" Vehicle Control History item has been stored in the hybrid vehicle control ECU, 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

Tech Tips

Malfunctioning areas can be identified by performing the Active Test "Control the Injection Volume for A/F Sensor". This Active Test can help to determine whether the air fuel ratio sensor (sensor 1 and sensor 2) and other potential trouble areas are malfunctioning.

The following procedure describes how to perform the Active Test "Control the Injection Volume for A/F Sensor" using the GTS.

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Put the engine in Inspection Mode (2WD for measuring Exhaust Gas).

Click here
Start the engine and warm it up until the engine coolant temperature is 75°C (167°F) or higher.
Idle the engine for 5 minutes or more with park (P) selected.
Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / A/F (O2) Sensor Voltage B1S1 and A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Voltage B2S1 and A/F (O2) Sensor Current B2S2.
Perform the Active Test with the engine idling (change the fuel injection volume).
Monitor the output voltage of the air fuel ratio sensor (sensor 1) (A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1) and air fuel ratio sensor (sensor 2) (A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S2) displayed on the GTS.

Tech Tips

The Active Test "Control the Injection Volume for A/F Sensor" can be used to lower the fuel injection volume by 12.5% or increase the injection volume by 12.5%.
Each sensor reacts in accordance with the increase and decrease in the fuel injection volume.

Standard
GTS Display (Sensor)	Injection Volume	Status	Output Value
A/F (O2) Sensor Voltage B1S1 A/F (O2) Sensor Voltage B2S1 (Air fuel ratio sensor (sensor 1))	12.5%	Rich	Below 3.1 V
	-12.5%	Lean	Higher than 3.4 V
A/F (O2) Sensor Current B1S2 A/F (O2) Sensor Current B2S2 (Air fuel ratio sensor (sensor 2))	12.5%	Rich	Below -0.86 mA
	-12.5%	Lean	Higher than 0.33 mA

Note

The air fuel ratio sensor (sensor 1) has an output delay of a few seconds and the air fuel ratio sensor (sensor 2) has a maximum output delay of approximately 20 seconds.

Performing the Active Test "Control the Injection Volume for A/F Sensor" allows the output value of the air fuel ratio sensor (sensor 1 and sensor 2) to be checked and graphed.

Note

Inspect the fuses for circuits related to this system before performing the following procedure.

Tech Tips

Bank 1 refers to the bank that includes the No. 1 cylinder*.

*: The No. 1 cylinder is the cylinder which is farthest from the transmission.
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.
Read freeze frame data using the GTS. Freeze frame data records the engine condition when malfunctions are detected. 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

READ OUTPUT DTC (DTC P013616 OR P015616)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Result	Proceed to
P013616 or P015616 is output	A
P013616 or P015616 and other DTCs are output	B

Tech Tips

If any DTCs other than P013616 or P015616 are output, troubleshoot those DTCs first.

GO TO DTC CHART Click here

PERFORM ACTIVE TEST USING GTS (CONTROL THE INJECTION VOLUME FOR A/F SENSOR)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Put the engine in Inspection Mode (2WD for measuring Exhaust Gas).

Powertrain > Hybrid Control > Utility

Tester Display

Inspection Mode
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
Idle the engine for 5 minutes or more with park (P) selected.

Tester Display
Inspection Mode

Enter the following menus: Powertrain / Engine / Active Test / Control the Injection Volume for A/F Sensor / Data List / A/F (O2) Sensor Voltage B1S1 and A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Voltage B2S1 and A/F (O2) Sensor Current B2S2.

Powertrain > Engine > Active Test

Active Test Display
Control the Injection Volume for A/F Sensor

Data List Display
A/F (O2) Sensor Voltage B1S1
A/F (O2) Sensor Voltage B2S1
A/F (O2) Sensor Current B1S2
A/F (O2) Sensor Current B2S2

Perform the Control the Injection Volume for A/F Sensor operation with the engine idling.

Monitor the output values of the air fuel ratio sensor (sensor 1) and air fuel ratio sensor (sensor 2) (A/F (O2) Sensor Voltage B1S1 and A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Voltage B2S1 and A/F (O2) Sensor Current B2S2) displayed on the GTS.

Tech Tips

The Control the Injection Volume for A/F Sensor operation lowers the fuel injection volume by 12.5% or increases the injection volume by 12.5%.
The air fuel ratio sensor (sensor 1) has an output delay of a few seconds and the air fuel ratio sensor (sensor 2) has a maximum output delay of approximately 20 seconds.
If the sensor output value does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.
With V type engines, when the sensor output values for both banks stay as either lean or rich, parts other than the sensor may be malfunctioning. Comparing the sensor output for both banks can be useful when troubleshooting.

Standard
GTS Display (Sensor)	Injection Volume	Status	Value
A/F (O2) Sensor Voltage B1S1 A/F (O2) Sensor Voltage B2S1 (Air fuel ratio (sensor 1))	12.5%	Rich	Below 3.1 V
	-12.5%	Lean	Higher than 3.4 V
A/F (O2) Sensor Current B1S2 A/F (O2) Sensor Current B2S2 (Air fuel ratio (sensor 2))	12.5%	Rich	Below -0.86 mA
	-12.5%	Lean	Higher than 0.33 mA

Result

Status of A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1	Status of A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S2	Suspected Trouble Area	Proceed to
Lean/Rich	Lean/Rich	Air fuel ratio sensor (sensor 2)	A
Lean	Lean	Gas leak from exhaust system EGR valve assembly Extremely lean actual air fuel ratio Air fuel ratio sensor (sensor 2)	B
Rich	Rich	Gas leak from exhaust system EGR valve assembly Extremely rich actual air fuel ratio Air fuel ratio sensor (sensor 2)	B
Lean/Rich	Lean	Air fuel ratio sensor (sensor 2) Gas leak from exhaust system	C
Lean/Rich	Rich	Air fuel ratio sensor (sensor 2) Gas leak from exhaust system	C
Lean	Lean/Rich	Air fuel ratio sensor (sensor 1) Air fuel ratio sensor (sensor 2)	D
Rich	Lean/Rich	Air fuel ratio sensor (sensor 1) Air fuel ratio sensor (sensor 2)	D

Lean: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor (sensor 1) output voltages (A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1) is consistently higher than 3.4 V, and the air fuel ratio sensor (sensor 2) output currents (A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S2) is consistently higher than 0.33 mA.
Rich: During the Control the Injection Volume for A/F Sensor Active Test, the A/F (O2) Sensor Voltage B1S1 or A/F (O2) Sensor Voltage B2S1 is consistently below 3.1 V, and the A/F (O2) Sensor Current B1S2 or A/F (O2) Sensor Current B2S2 is consistently below -0.86 mA.
Lean/Rich: During the Control the Injection Volume for A/F Sensor Active Test, the output value of the air fuel ratio sensor (sensor 1) or air fuel ratio sensor (sensor 2) alternate correctly.

Tech Tips

Refer to "Data List / Active Test" [A/F (O2) Sensor Voltage B1S1, A/F (O2) Sensor Voltage B2S1, A/F (O2) Sensor Current B1S2 and A/F (O2) Sensor Current B2S2].

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CHECK FOR EXHAUST GAS LEAK Click here

REPLACE AIR FUEL RATIO SENSOR (SENSOR 1) Click here

REPLACE AIR FUEL RATIO SENSOR (SENSOR 2)

Replace the air fuel ratio sensor (sensor 2).

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Tech Tips

Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 2).

Click here

Result

Proceed to
NEXT

CLEAR DTC

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display

All Readiness
Input the DTC: P013616 or P015616.

Tester Display
All Readiness

Check the DTC judgment result.

Result
GTS 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

Result

Proceed to
NEXT

END

CHECK FOR EXHAUST GAS LEAK

Check for exhaust gas leaks.

OK
No gas leaks in exhaust system.

Tech Tips

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

Click here

Result

Proceed to
OK
NG

REPAIR OR REPLACE EXHAUST SYSTEM

PERFORM ACTIVE TEST USING GTS (CONTROL THE EGR STEP POSITION)

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Put the engine in Inspection Mode (2WD for measuring Exhaust Gas).

Powertrain > Hybrid Control > Utility

Tester Display

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

Tech Tips

The A/C switch and all accessories should be off.

Tester Display
Inspection Mode

Enter the following menus: Powertrain / Engine / Active Test / Control the EGR Step Position / Data List / Intake Manifold Absolute Pressure and Engine Independent.

Powertrain > Engine > Active Test

Active Test Display
Control the EGR Step Position

Data List Display
Intake Manifold Absolute Pressure
Engine Independent

Confirm that the value of Data List item Engine Independent is "Operate" then check the value of Intake Manifold Absolute Pressure while performing the Active Test.

Note

Make sure that the value of Data List item Engine Independent is "Operate" while performing the Active Test.
Do not leave the EGR valve open for 10 seconds or more during the Active Test.
Be sure to return the EGR valve to step 0 when the Active Test is completed.
Do not open the EGR valve 30 steps or more during the Active Test.

OK
The value of Intake Manifold Absolute Pressure changes in response to the EGR step position when the value of Engine Independent is "Operate".

Standard

Control the EGR Step Position (Active Test)

0 Steps

0 to 30 Steps

Intake Manifold Absolute Pressure

(Data List)

(EGR valve is fully closed)

Intake Manifold Absolute Pressure value is at least +10 kPa (1.45 psi) higher than when EGR valve is fully closed

Tech Tips

If the value of Data List item Engine Independent is "Not Opr" when the engine is idling, charge control is being performed. Perform the Active Test after charge control is complete ("Operate" is displayed).
While performing the Active Test, if the increase in the value of Intake Manifold Absolute Pressure is small, the EGR valve assembly may be malfunctioning.
Even if the EGR valve assembly is malfunctioning, rough idling or an increase in the value of Intake Manifold Absolute Pressure may occur while performing the Active Test. However, the amount that the value of Intake Manifold Absolute Pressure increases will be smaller than normal.

Result

Proceed to
OK
NG

GO TO STEP 9 Click here

INSPECT EGR VALVE ASSEMBLY

Remove the EGR valve assembly.

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Check if the EGR valve is stuck open.

OK
EGR valve is tightly closed.

Tech Tips

Perform "Inspection After Repair" after replacing the EGR valve assembly.

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Result

Proceed to
OK
NG

REPLACE EGR VALVE ASSEMBLY Click here

CHECK CAUSE OF EXTREMELY RICH OR LEAN ACTUAL AIR FUEL RATIO

Check the cause of extremely rich or lean actual air fuel ratio, referring to the DTC P017100, P017200, P017400 and P017500 Inspection Procedure.

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Result

Proceed to
NEXT

GO TO STEP 12 Click here

CHECK FOR EXHAUST GAS LEAK

Check for exhaust gas leaks.

OK
No gas leaks in exhaust system.

Tech Tips

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

Click here
Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 2).

Click here

Result

Proceed to
OK
NG

REPLACE AIR FUEL RATIO SENSOR (SENSOR 2) Click here

REPAIR OR REPLACE EXHAUST SYSTEM

REPLACE AIR FUEL RATIO SENSOR (SENSOR 1)

Replace the air fuel ratio sensor (sensor 1).

Click here

Tech Tips

Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 1).

Click here

Result

Proceed to
NEXT

CLEAR DTC

Connect the GTS to the DLC3.
Turn the power switch on (IG).
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P013616 OR P015616)

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Utility / All Readiness.

Powertrain > Engine > Utility

Tester Display

All Readiness
Input the DTC: P013616 or P015616.

Check that the DTC judgment result is NORMAL. If the DTC judgment result is INCOMPLETE, perform the confirmation drive pattern again but increase the vehicle speed.

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P013616 or P015616 is output)

Tech Tips

Perform "Inspection After Repair" after replacing the air fuel ratio sensor (sensor 2).

Click here

END

REPLACE AIR FUEL RATIO SENSOR (SENSOR 2) Click here