SFI SYSTEM, Diagnostic DTC:P219519, P219524, P219618, P219623

DTC Code	DTC Name
P219519	A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold
P219524	A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck High
P219618	A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Below Threshold
P219623	A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck Low

DESCRIPTION

Refer to DTC P003012.

Click here

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	Note
P219519	A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Circuit Current Above Threshold	While the fuel-cut operation is performed (during vehicle deceleration), the air fuel ratio sensor (sensor 1) current is 2.2 mA or more for 3 seconds (2 trip detection logic).	Open or short in air fuel ratio sensor (sensor 1) circuit Air fuel ratio sensor (sensor 1) Intake system Gas leak from exhaust system Fuel pressure (for low pressure side) Fuel pressure (for high pressure side) Fuel injector assembly Fuel system ECM	Comes on	DTC stored	SAE: P2195
P219524	A/F (O2) Sensor Signal Biased/Stuck Lean Bank 1 Sensor 1 Signal Stuck High	Both of the following conditions are met for 5 seconds or more (2 trip detection logic): Air fuel ratio sensor (sensor 1) voltage is more than 3.8 V. Air fuel ratio sensor (sensor 2) current is less than 0.0551 mA.	Open or short in air fuel ratio sensor (sensor 1) circuit Air fuel ratio sensor (sensor 1) Intake system Gas leak from exhaust system Fuel pressure (for low pressure side) Fuel pressure (for high pressure side) Fuel injector assembly Fuel system ECM	Comes on	DTC stored	SAE: P2195
P219618	A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Circuit Current Below Threshold	While the fuel-cut operation is performed (during vehicle deceleration), the air fuel ratio sensor (sensor 1) current is less than 0.47 mA for 3 seconds (2 trip detection logic).	Open or short in air fuel ratio sensor (sensor 1) circuit Air fuel ratio sensor (sensor 1) Intake system Gas leak from exhaust system Fuel pressure (for low pressure side) Fuel pressure (for high pressure side) Fuel injector assembly Fuel system ECM	Comes on	DTC stored	SAE: P2196
P219623	A/F (O2) Sensor Signal Biased/Stuck Rich Bank 1 Sensor 1 Signal Stuck Low	Both of the following conditions are met for 5 seconds or more (2 trip detection logic): Air fuel ratio sensor (sensor 1) voltage is less than 2.8 V. Air fuel ratio sensor (sensor 2) current is -0.0852 mA or more.	Open or short in air fuel ratio sensor (sensor 1) circuit Air fuel ratio sensor (sensor 1) Intake system Gas leak from exhaust system Fuel pressure (for low pressure side) Fuel pressure (for high pressure side) Fuel injector assembly Fuel system ECM	Comes on	DTC stored	SAE: P2196

Tech Tips

DTCs P219519, P219524, P219618 and P219623 indicate malfunctions related to the bank 1 air fuel ratio sensor circuit.
When any of these DTCs are stored, check the air fuel ratio sensor (sensor 1) current output by entering the following menus on the GTS: Powertrain / Engine / Data List / A/F (O2) Sensor Current B1S1 or A/F (O2) Sensor Current B2S1.
Short-term fuel trim values can also be read using the GTS.
If an air fuel ratio sensor (sensor 1) malfunction is detected, the ECM will store a DTC.

MONITOR DESCRIPTION

Air Fuel Ratio Sensor (Sensor 1) Low/High Current:
Under air fuel ratio feedback control, if the air fuel ratio sensor (sensor 1) output voltage is less than 2.8 V (very rich condition) for 5 seconds despite the air fuel ratio sensor (sensor 2) output current being -0.0852 mA or more, the ECM stores DTC P219623. Alternatively, if the air fuel ratio sensor (sensor 1) output voltage is more than 3.8 V (very lean condition) for 5 seconds despite the air fuel ratio sensor (sensor 2) output current being less than 0.0551 mA, DTC P219524 is stored.

Air Fuel Ratio Sensor (Sensor 1) Limit Current:
The ECM monitors the air fuel ratio sensor (sensor 1) current during fuel-cut and detects any abnormal current values.

If the air fuel ratio sensor (sensor 1) output is 2.2 mA or more for more than 3 seconds of cumulative time, the ECM interprets this as a malfunction in the air fuel ratio sensor (sensor 1) and stores DTC P219519 (stuck on high side). If the air fuel ratio sensor (sensor 1) output is less than 0.47 mA for more than 3 seconds of cumulative time, the ECM stores DTC P219618 (stuck on low side).

MONITOR STRATEGY

Required Sensors/Components (Main)

Air fuel ratio sensor (sensor 1)

Required Sensors/Components (Related)

Air fuel ratio sensor (sensor 2)

Frequency of Operation

Continuous: Sensor low/high current

Once per driving cycle: Sensor limit current

TYPICAL ENABLING CONDITIONS

Air Fuel Ratio Sensor (Sensor 1) Low/High Current
Time after engine start	30 seconds or more
Battery voltage	11 V or higher
Air fuel ratio sensor (sensor 1) status	Activated
Fuel system status	Closed-loop

Air Fuel Ratio Sensor (Sensor 1) Limit Current
Battery voltage	11 V or higher
Engine coolant temperature	75°C (167°F) or higher
Atmospheric pressure	76 kPa(abs) [11 psi(abs)] or higher
Air fuel ratio sensor (sensor 1) status	Activated
Continuous time of fuel-cut	3 seconds or more, and less than 10 seconds

CONFIRMATION DRIVING PATTERN

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the GTS on.
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher [A].
Drive the vehicle at a speed between 60 and 120 km/h (37 and 75 mph) for at least 10 minutes [B].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Using the GTS, enter the following menus to check the fuel-cut status: Powertrain / Engine / Data List / Idle Fuel Cut.
With shift state M selected [C], accelerate the vehicle to 64 km/h (40 mph) or more by depressing the accelerator pedal for at least 10 seconds [D].

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.
Soon after performing step [D] above, release the accelerator pedal for at least 5 seconds without depressing the brake pedal in order to execute fuel-cut control [E].

Tech Tips

While "Idle Fuel Cut" on the Data List is ON, fuel-cut control is being executed.
Allow the vehicle to decelerate until the vehicle speed decreases to less than 10 km/h (6 mph).
Repeat steps [C] through [E] above at least 3 times in one driving cycle.
Enter the following menus: Powertrain / Engine / Trouble Codes [F].
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: P219519, P219524, P219618, or P219623.

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 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 [F] again.

WIRING DIAGRAM

Refer to DTC P003012.

Click here

CAUTION / NOTICE / HINT

Note

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

Tech Tips

A low air fuel ratio sensor (sensor 1) current could be caused by a rich air fuel mixture. Check for conditions that would cause the engine to run rich.
A high air fuel ratio sensor (sensor 1) current could be caused by a lean air fuel mixture. Check for conditions that would cause the engine to run lean.
Read Freeze Frame Data using the GTS. 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.
Sensor 1 refers to the sensor closest to the engine assembly.
Sensor 2 refers to the sensor farthest away from the engine assembly.
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.

PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P219519, P219524, P219618 OR P219623)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Trouble Codes.

Powertrain > Engine > Trouble Codes

Read the DTCs.

Result

Result	Proceed to
DTC P219519, P219524, P219618 or P219623 is output	A
DTC P219519, P219524, P219618 or P219623 and other DTCs are output	B

Tech Tips

If any DTCs other than P219519, P219524, P219618 or P219623 are output, troubleshoot those DTCs first.

GO TO DTC CHART Click here

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

CLEAR DTC Click here

YES

CLEAR DTC

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P219519, P219524, P219618 or P219623)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the GTS on.
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: P219519, P219524, P219618 or P219623.

Tester Display
All Readiness

Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P219519, P219524, P219618 or P219623 is output)

DTC CAUSED BY RUNNING OUT OF FUEL

CLEAR DTC

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

READ VALUE USING GTS (A/F (O2) SENSOR CURRENT)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the GTS on.
Drive the vehicle in accordance with the driving pattern described in Confirmation Driving Pattern.
Enter the following menus: Powertrain / Engine / Data List / A/F (O2) Sensor Current B1S1.

Powertrain > Engine > Data List

Tester Display

A/F (O2) Sensor Current B1S1

Check the test value of the air fuel ratio sensor (sensor 1) output current during fuel-cut, referring to the Driving Pattern Detail for [C] through [E] in the Confirmation Driving Pattern.

Tech Tips

To measure the air fuel ratio sensor (sensor 1) current precisely, perform the fuel-cut operation as long as possible.
If it is difficult to measure the air fuel ratio sensor (sensor 1) current, use the snapshot function of the GTS.

Result

Test Value

Proceed to

Within normal range

(0.47 mA or more, and less than 2.2 mA)

Outside normal range

(Less than 0.47 mA, or 2.2 mA or more)

REPLACE AIR FUEL RATIO SENSOR (SENSOR 1) Click here

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

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Start the engine and warm it up until the engine coolant temperature reaches 75°C (167°F) or higher.
Warm up the air fuel ratio sensors at an engine speed of 2500 rpm for 90 seconds.

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

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

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

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.

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 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
Lean/Rich	Lean/Rich	Normal

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.

Tech Tips

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

Click here

GO TO STEP 14 Click here

CHECK INTAKE SYSTEM

Check the intake system for vacuum leaks.

Click here

OK
No leaks in the intake system.

Tech Tips

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

Click here

Result

Proceed to
OK
NG

REPAIR OR REPLACE INTAKE SYSTEM

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

CHECK FUEL PRESSURE (FOR LOW PRESSURE SIDE)

Check the fuel pressure (for low pressure side).

Click here

Result

Proceed to
OK
NG

CHECK FUEL LINE Click here

READ VALUE USING GTS (HIGH FUEL PRESSURE SENSOR)

Connect the GTS to the DLC3.
Start the engine.
Turn the GTS on.

Enter the following menus: Powertrain / Engine / Data List / High Fuel Pressure Sensor and Injection Mode.

Powertrain > Engine > Data List

Tester Display
High Fuel Pressure Sensor
Injection 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.

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

Standard

GTS Display	Condition	Specified Condition
High Fuel Pressure Sensor	Park (P) selected A/C: Off Engine warmed up Engine Speed: 3000 rpm Injection Mode: Direct	2.4 to 20 MPa

Result

Proceed to
OK
NG

REPAIR OR REPLACE FUEL SYSTEM (FOR HIGH PRESSURE SIDE)

INSPECT FUEL INJECTOR ASSEMBLY

Inspect the fuel injector assembly.

Click here

Tech Tips

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

Click here

Result

Proceed to
OK
NG

GO TO STEP 14 Click here

REPLACE FUEL INJECTOR ASSEMBLY Click here

CHECK FUEL LINE

Check the fuel lines for leaks or blockage.

Tech Tips

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

Click here

Result

Proceed to
OK
NG

GO TO FUEL PUMP CONTROL CIRCUIT Click here

REPAIR OR REPLACE FUEL LINE

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 ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs

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

Result

Proceed to
NEXT

CHECK WHETHER DTC OUTPUT RECURS (DTC P219519, P219524, P219618 or P219623)

Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Clear the DTCs.

Powertrain > Engine > Clear DTCs
Turn the ignition switch off and wait for at least 30 seconds.
Turn the ignition switch to ON.
Turn the GTS on.
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: P219519, P219524, P219618 or P219623.

Check the DTC judgment result.

Result

Proceed to

NORMAL

(DTCs are not output)

ABNORMAL

(DTC P219519, P219524, P219618 or P219623 is output)

END

REPLACE ECM Click here