DTC P2195-19: A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold; DTC P2195-24: A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck High; DTC P2196-18: A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Below Threshold; DTC P2196-23: A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck Low [12/2019 - 10/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2195-19, P2195-24, P2196-18 OR P2196-23)

Read the DTCs.

Powertrain > Engine > Trouble Codes

Result

Result	Proceed to
DTC P2195-19, P2195-24, P2196-18 or P2196-23 is output	A
DTC P2195-19, P2195-24, P2196-18 or P2196-23 and P00D5-62 are output	A
DTC P2195-19, P2195-24, P2196-18 or P2196-23 and other DTCs are output	B

HINT:

If any DTCs other than P2195-19, P2195-24, P2196-18 or P2196-23 are output, troubleshoot those DTCs first.

Result:

GO TO DTC CHART . Refer to DIAGNOSTIC TROUBLE CODE CHART [12/2019 - 09/2020] , or refer to DIAGNOSTIC TROUBLE CODE CHART [09/2020 - 10/2021] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2021 - 10/2022]

Result:

See step 2

CONFIRM IF VEHICLE HAS RUN OUT OF FUEL IN PAST

Has the vehicle run out of fuel in the past?

Result

Proceed to
YES
NO

Result:

See step 5

Result:

YES

See step 3

CLEAR DTC

Clear the DTCs.
Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

Result:

See step 4

CHECK WHETHER DTC OUTPUT RECURS (DTC P2195-19, P2195-24, P2196-18 OR P2196-23)

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

Check the DTC judgment result.

Powertrain > Engine > Utility

Tester Display
All Readiness

Input the DTC: P2195-19, P2195-24, P2196-18 or P2196-23.

Result

Result	Proceed to
NORMAL (DTCs are not output)	A
ABNORMAL (DTC P2195-19, P2195-24, P2196-18 or P2196-23 is output)	B

Result:

DTC CAUSED BY RUNNING OUT OF FUEL

Result:

See step 5

CLEAR DTC

Clear the DTCs.
Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

Result:

See step 6

READ VALUE USING GTS (TEST VALUE OF AIR FUEL RATIO SENSOR (SENSOR 1))

Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Check that the status of O2 Sensor is Complete. If the status is still Incomplete, drive the vehicle according to the driving pattern again.
Powertrain > Engine > Monitor

Check the test value of the air fuel ratio sensor (sensor 1) output current during fuel-cut.

Powertrain > Engine > Monitor

Result

Test Value	Proceed to
Within normal range (0.47 mA or more, and less than 2.2 mA)	A
Outside normal range (Less than 0.47 mA, or 2.2 mA or more)	B

Result:

See step 22

Result:

See step 7

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

Put the engine in Inspection Mode (Maintenance Mode).

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.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

Idle the engine for 5 minutes or more with the shift lever in P.

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

Powertrain > Engine > Active Test

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

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

Monitor the output currents of the air fuel ratio sensors (A/F (O2) Sensor Current B1S1 and A/F (O2) Sensor Current B1S2) displayed on the GTS.

HINT:

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 current does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.

STANDARD

GTS Display (Sensor)	Injection Volume	Status	Current
A/F (O2) Sensor Current B1S1 (Air fuel ratio sensor (sensor 1))	12.5%	Rich	Below -0.075 mA
	-12.5%	Lean	More than 0.037 mA
A/F (O2) Sensor Current B1S2 (Air fuel ratio sensor (sensor 2))	12.5%	Rich	Below -0.86 mA
	-12.5%	Lean	More than 0.33 mA

Result

Status of A/F (O2) Sensor Current B1S1	Status of A/F (O2) Sensor Current B1S2	Air Fuel Ratio Condition and Air Fuel Ratio Sensor (Sensor 1) Condition	Proceed to
Lean	Lean	Actual air fuel ratio lean	A
Rich	Rich	Actual air fuel ratio rich	A
Lean	Lean/Rich	Air fuel ratio sensor (sensor 1) malfunction	B
Rich	Lean/Rich	Air fuel ratio sensor (sensor 1) malfunction	B
Lean/Rich	Lean/Rich	Normal	C

Lean: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor (sensor 1) output current (A/F (O2) Sensor Current B1S1) is consistently more than 0.037 mA, and the air fuel ratio sensor (sensor 2) output current (A/F (O2) Sensor Current B1S2) is consistently more than 0.33 mA.
Rich: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor (sensor 1) output current (A/F (O2) Sensor Current B1S1) is consistently below -0.075 mA, and the air fuel ratio sensor (sensor 2) output current (A/F (O2) Sensor Current B1S2) is consistently below -0.86 mA.
Lean/Rich: During the Control the Injection Volume for A/F Sensor Active Test, the output current of the air fuel ratio sensor (sensor 1) or air fuel ratio sensor (sensor 2) alternate correctly.

HINT:

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

Refer to DATA LIST / ACTIVE TEST [12/2019 - 09/2020] , or refer to DATA LIST / ACTIVE TEST [09/2020 - 10/2021] , or refer to DATA LIST / ACTIVE TEST [10/2021 - 10/2022]

Result:

See step 22

Result:

See step 19

Result:

See step 8

CHECK INTAKE SYSTEM

Check the intake system for vacuum leaks.

Refer to ON-VEHICLE INSPECTION [12/2019 - ]

No leaks in the intake system.

HINT:

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

Refer to INITIALIZATION [12/2019 - 10/2021] , or refer to INITIALIZATION [10/2021 - ]

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE INTAKE SYSTEM

Result:

See step 9

CHECK FOR EXHAUST GAS LEAK

Check for exhaust gas leaks.

No gas leaks in exhaust system.

HINT:

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

Refer to INITIALIZATION [12/2019 - 10/2021] , or refer to INITIALIZATION [10/2021 - ]

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE EXHAUST SYSTEM

Result:

See step 10

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

Put the engine in Inspection Mode (Maintenance Mode).

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.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

HINT:

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

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.

Powertrain > Engine > Active Test

Active Test Display
Control the EGR Step Position

Data List Display
Intake Manifold Absolute Pressure
Engine Independent

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.

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

Standard

-	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

HINT:

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

Result:

See step 12

Result:

See step 11

INSPECT EGR VALVE ASSEMBLY

Remove the EGR valve assembly.
Refer to REMOVAL [12/2019 - 10/2021] , or refer to REMOVAL [10/2021 - 10/2022]

Check if the EGR valve is stuck open.

EGR valve is tightly closed.

HINT:

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

Refer to INITIALIZATION [12/2019 - 10/2021] , or refer to INITIALIZATION [10/2021 - ]

Result

Proceed to
OK
NG

Result:

REPLACE EGR VALVE ASSEMBLY

Refer to REMOVAL [12/2019 - 10/2021] , or refer to REMOVAL [10/2021 - 10/2022]

Result:

See step 12

CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE)
Refer to PROCEDURE - Step 2

Result

Proceed to

OK

NG

Result:

NG

See step 20

Result:

OK

See step 13

INSPECT PORT FUEL INJECTOR ASSEMBLY

Inspect the port fuel injector assembly (whether fuel volume is high or low, and whether injection pattern is poor).

Refer to INSPECTION [12/2019 - ]

HINT:

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

Refer to INITIALIZATION [12/2019 - 10/2021] , or refer to INITIALIZATION [10/2021 - ]

Result

Proceed to
OK
NG

Result:

REPLACE PORT FUEL INJECTOR ASSEMBLY

Refer to REMOVAL [12/2019 - 10/2021] , or refer to REMOVAL [10/2021 - 10/2022]

Result:

See step 14

READ VALUE USING GTS (FUEL PRESSURE (HIGH))

Put the engine in Inspection Mode (Maintenance Mode).

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 with all the accessories switched off.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List

Tester Display
Engine Speed
Fuel Pressure (High)
Injection Mode

HINT:

During charge control, the engine speed is set at idle. Therefore, the engine speed will not increase when the accelerator pedal is depressed. In this case, read the Data List after charge control has completed.

Standard

GTS Display	Condition	Specified Condition
Fuel Pressure (High)	Shift position: P A/C: Off Engine warmed up Engine Speed: 2500 rpm Injection Mode: Direct	3000 to 25000 kPa

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE FUEL SYSTEM (FOR HIGH PRESSURE SIDE)

Result:

See step 15

INSPECT DIRECT FUEL INJECTOR ASSEMBLY
Refer to INSPECTION [12/2019 - ]

HINT:

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

Refer to INITIALIZATION [12/2019 - 10/2021] , or refer to INITIALIZATION [10/2021 - ]

Result

Proceed to

OK

NG

Result:

NG

REPLACE DIRECT FUEL INJECTOR ASSEMBLY

Refer to REMOVAL [12/2019 - 10/2021] , or refer to REMOVAL [10/2021 - 10/2022]

Result:

OK

See step 16
REPLACE AIR FUEL RATIO SENSOR (SENSOR 1)
Refer to REMOVAL [12/2019 - ]

HINT:

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

Refer to INITIALIZATION [12/2019 - 10/2021] , or refer to INITIALIZATION [10/2021 - ]

Result

Proceed to

NEXT

Result:

NEXT

See step 17

CLEAR DTC

Clear the DTCs.
Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

Result:

See step 18

CHECK WHETHER DTC OUTPUT RECURS (DTC P2195-19, P2195-24, P2196-18 OR P2196-23)

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

Check the DTC judgment result.

Powertrain > Engine > Utility

Tester Display
All Readiness

Input the DTC: P2195-19, P2195-24, P2196-18 or P2196-23.

Result

Result	Proceed to
NORMAL (DTCs are not output)	A
ABNORMAL (DTC P2195-19, P2195-24, P2196-18 or P2196-23 is output)	B

Result:

END

Result:

REPLACE ECM

Refer to REMOVAL [12/2019 - 10/2022]

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

Put the engine in Inspection Mode (Maintenance Mode).

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.

Powertrain > Engine > Data List

Tester Display
Coolant Temperature

HINT:

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

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.

Powertrain > Engine > Active Test

Active Test Display
Control the EGR Step Position

Data List Display
Intake Manifold Absolute Pressure Supported
Engine Independent

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.

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

Standard

-	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

HINT:

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

Result:

See step 22

Result:

See step 21

CHECK FUEL LINE

Check the fuel lines for leaks or blockage.

Result

Proceed to
OK
NG

Result:

GO TO FUEL PUMP CONTROL CIRCUIT

Refer to Fuel Pump Control Circuit [12/2019 - 10/2021] , or refer to Fuel Pump Control Circuit [10/2021 - 11/2024]

Result:

REPAIR OR REPLACE FUEL LINE

INSPECT EGR VALVE ASSEMBLY

Remove the EGR valve assembly.
Refer to REMOVAL [12/2019 - 10/2021] , or refer to REMOVAL [10/2021 - 10/2022]

Check if the EGR valve is stuck open.

EGR valve is tightly closed.

HINT:

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

Refer to INITIALIZATION [12/2019 - 10/2021] , or refer to INITIALIZATION [10/2021 - ]

Result

Proceed to
OK
NG

Result:

See step 22

Result:

REPLACE EGR VALVE ASSEMBLY

Refer to REMOVAL [12/2019 - 10/2021] , or refer to REMOVAL [10/2021 - 10/2022]

REPLACE AIR FUEL RATIO SENSOR (SENSOR 1)
Refer to REMOVAL [12/2019 - ]

HINT:

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

Refer to INITIALIZATION [12/2019 - 10/2021] , or refer to INITIALIZATION [10/2021 - ]

Result

Proceed to

NEXT

Result:

NEXT

See step 23

CLEAR DTC

Clear the DTCs.
Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

Result:

See step 24

CHECK WHETHER DTC OUTPUT RECURS (DTC P2195-19, P2195-24, P2196-18 OR P2196-23)

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

Check the DTC judgment result.

Powertrain > Engine > Utility

Tester Display
All Readiness

Input the DTC: P2195-19, P2195-24, P2196-18 or P2196-23.

Result

Result	Proceed to
NORMAL (DTCs are not output)	A
ABNORMAL (DTC P2195-19, P2195-24, P2196-18 or P2196-23 is output)	B

Result:

END

Result:

REPLACE ECM

Refer to REMOVAL [12/2019 - 10/2022]