DESCRIPTION

HO2S fuel injection control system:

• P2096:00: Air fuel too lean

• P2097:00: Air fuel too rich

DETECTION CONDITION

Determination conditions

• P2096:00: Depending on the correction deviation of the A/F sensor, a condition in which the fuel feedback correction amount (SHRTFT12) for the HO2S is the specified value (2 %) or more and the sum (SHRTFT12+LONGFT12) of the fuel feedback correction amount and the fuel learning correction amount is the specified value (2.3—2.5 %) or more continues for a period of 25 s.

• P2097:00: Depending on the correction deviation of the A/F sensor, a condition in which the fuel feedback correction amount (SHRTFT12) for the HO2S is the specified value (−2 %) or less and the sum (SHRTFT12+LONGFT12) of the fuel feedback correction amount and the fuel learning correction amount is the specified value (−2.5— −2.3 %) or less continues for a period of 25 s.

Preconditions

• HO2S estimated temperature: above 450 °C {842 °F}

Malfunction determination period

• 25 s period

Drive cycle

• 2

Self test type

• CMDTC self test

Sensor used

• HO2S

FAIL-SAFE FUNCTION

• Not applicable

VEHICLE STATUS WHEN DTCs ARE OUTPUT

• Illuminates check engine light.

POSSIBLE CAUSE

• Erratic signal to PCM

• ECT sensor No.1 signal malfunction

• MAF sensor signal malfunction

• MAP sensor signal malfunction

• IAT sensor No.2 signal malfunction

• Related connector or terminals malfunction

• Related wiring harness malfunction

• Improper operation of electric variable valve timing control system

• Electric variable valve timing driver malfunction

• Electric variable valve timing motor malfunction

• Electric variable valve timing actuator malfunction

• Improper operation of hydraulic variable valve timing control system

• Air suction in intake air system

• Poor fuel quality

• HO2S malfunction

• HO2S loose

• A/F sensor malfunction

• A/F sensor loose

• Exhaust system leakage

• A/F sensor deterioration

• Fuel injector malfunction

• Improper operation of fuel injector

• Fuel injector related wiring harness malfunction

• Improper operation of purge control system

• Purge solenoid valve malfunction

• Purge solenoid hoses improper connection

• Fuel leakage or restriction in fuel line

• MAP sensor malfunction

• MAF sensor malfunction

• Air cleaner element restricted

• PCM malfunction

Item

Definition

Unit

Condition/Specification

EQ_RAT11

Excess air factor (estimated value) to theoretical air/fuel ratio (14.7) by fuel feedback control

—

Ignition switched ON (engine off)

• ECT is 92 °C {198 °F}: Approx. 0.99

Idle (after warm up)

• ECT is 93 °C {199 °F}: Approx. 0.99

Racing (Engine speed is 2,000 rpm)

• ECT is 92 °C {198 °F}: Approx. 1

Racing (Engine speed is 4,000 rpm)

• ECT is 93 °C {199 °F}: Approx. 0.99

O2S11

A/F sensor current

µA

• Idle (after warm up): −59 µA (ECT is 92 °C {198 °F})

• Deceleration fuel cut (accelerator pedal released from engine speed of 4,000 rpm or more): Approx. 3.48 mA (ECT is 92 °C {198 °F})

O2S12

HO2S voltage

V

• Idle (after warm up): 0—1.0 V (ECT is 91 °C {196 °F})

• Deceleration fuel cut (accelerator pedal released from engine speed of 4,000 rpm or more): Approx. 0 V (ECT is 92 °C {198 °F})

Item

Definition

Unit

Operation

EVAPCP

Purge solenoid valve control signal

%

• Changes % and forcibly drives/stops purge solenoid valve.

INJ_1

Fuel injector No.1

OFF

• Select OFF to forcibly stop fuel injector No.1.

INJ_2

Fuel injector No.2

OFF

• Select OFF to forcibly stop fuel injector No.2.

INJ_3

Fuel injector No.3

OFF

• Select OFF to forcibly stop fuel injector No.3.

INJ_4

Fuel injector No.4

OFF

• Select OFF to forcibly stop fuel injector No.4.

STEP

INSPECTION

RESULTS

ACTION

1

• Verify related Service Bulletins and/or on-line repair information availability.

• Is any related repair information available?

Yes

Perform repair or diagnosis according to the available repair information.

• If the vehicle is not repaired, go to the next step.

No

Go to the next step.

2

• Is the DTC P2096:00 or P2097:00 on FREEZE FRAME DATA?

Yes

Go to the next step.

No

Go to the troubleshooting procedure for DTC on FREEZE FRAME DATA.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

3

NOTE:

• Recording can be facilitated using the screen capture function of the PC.

• Record the FREEZE FRAME DATA/snapshot data on the repair order.

—

Go to the next step.

4

• Verify the snapshot data FLI.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Is the snapshot data FLI 5% or less?

Yes

Refill the fuel.

Go to the troubleshooting procedure to perform the procedure from Step 13.

No

Go to the next step.

5

• Switch the ignition off, then ON (engine off).

• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Is the PENDING CODE/DTC P0088:00, P0192:00 or P0193:00 also present?

Yes

Go to the applicable DTC inspection.

(See DTC P0088:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0192:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0193:00 [PCM (SKYACTIV-G 2.0)].)

Go to the next step.

No

Go to the next step.

6

• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Is the PENDING CODE/DTC P0010:00, P0011:00, P0012:00, P0014:00, P0015:00, P1380:00, P2090:00 or P2091:00 also present?

Yes

Go to the applicable DTC inspection.

(See DTC P0010:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0011:00, P0012:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0014:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0015:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P1380:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P2090:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P2091:00 [PCM (SKYACTIV-G 2.0)].)

Go to the next step.

No

Go to the next step.

7

• Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Is the PENDING CODE/DTC P0300:00, P0301:00, P0302:00, P0303:00 or P0304:00 also present?

Yes

Go to the applicable DTC inspection.

(See DTC P0300:00 [PCM (SKYACTIV-G 2.0)].)

(See DTC P0301:00, P0302:00, P0303:00, P0304:00 [PCM (SKYACTIV-G 2.0)].)

Go to the next step.

No

Go to the next step.

8

• Start the engine and warm it up completely.

• Access the following PIDs using the M-MDS:

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• O2S11

• O2S12

• Drive the vehicle under the following conditions.

  WARNING:

  • When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.

  • While performing this step, always operate the vehicle in a safe and lawful manner.

• After increasing the engine speed to 3,000 rpm, decelerate using engine braking.

• Is the displayed PID value as follows?

• O2S11: 0.25 mA or more

• O2S12: 0.3 V or less

Yes

Go to Step 10.

No

Go to the next step.

9

• Access the following PIDs using the M-MDS:

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• O2S11

• O2S12

• When the PCM, A/F sensor and HO2S are shaken, does the PID value include a PID item which has changed?

Yes

Inspect the related wiring harness and connector.

• Repair or replace the malfunctioning part.

Go to the troubleshooting procedure to perform the procedure from Step 13.

No

Go to the troubleshooting procedure to perform the procedure from Step 1.

10

• Start the engine and idle it.

• Access the following simulation items using the M-MDS:

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• INJ_1

• INJ_2

• INJ_3

• INJ_4

• Using the simulation function, can the change in engine speed be verified when operation of each of the fuel injectors is stopped?

Yes

Go to the next step.

No

Go to the troubleshooting procedure to perform the procedure from Step 3.

11

• Start the engine and idle it.

• Access the EQ_RAT11 PID and simulation item EVAPCP using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Using the simulation function, does the EQ_RAT11 PID value change when the purge solenoid valve is opened/closed?

Yes

Go to the troubleshooting procedure to perform the procedure from Step 5.

No

Go to the troubleshooting procedure to perform the procedure from Step 4.

STEP

INSPECTION

RESULTS

ACTION

1

• Inspect installation of HO2S.

• Is the HO2S installed securely?

Yes

Go to the next step.

No

Retighten the HO2S, then go to Step 13.

(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

2

• Inspect installation of A/F sensor.

• Is the A/F sensor installed securely?

Yes

Replace the A/F sensor and/or HO2S, then go to Step 13.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Retighten the A/F sensor, then go to Step 13.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

3

• In Step 10 of the function inspection using the M-MDS, perform a fail-safe injector operation inspection on the cylinders in which engine speed fluctuation could not be verified.

  (See ENGINE CONTROL SYSTEM OPERATION INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.

(See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

4

• Inspect the purge solenoid valve.

  (See PURGE SOLENOID VALVE INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the purge solenoid valve, then go to Step 13.

(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

5

• Visually inspect for leakage from fuel line between fuel distributor and fuel pump.

• Is there any leakage?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.

No

Go to the next step.

6

• Inspect for leakage or restriction in the fuel line (low-side).

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.

No

Go to the next step.

7

• Inspect installation of HO2S.

• Is the HO2S installed securely?

Yes

Go to the next step.

No

Retighten the HO2S, then go to Step 13.

(See HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

8

• Inspect installation of A/F sensor.

• Is the A/F sensor installed securely?

Yes

Go to the next step.

No

Retighten the A/F sensor, then go to Step 13.

(See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

9

• Verify the exhaust gas leakage from the exhaust system. (between A/F sensor and HO2S)

• Is there any malfunction?

Yes

Repair or replace the malfunctioning part according to the inspection results, then go to Step 13.

No

Go to the next step.

10

• Reconnect all disconnected connectors.

• Inspect the MAP sensor.

  (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the MAP sensor/IAT sensor No.2, then go to Step 13.

(See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.2 REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

11

• Inspect the MAF sensor.

  (See MASS AIR FLOW (MAF) SENSOR INSPECTION [SKYACTIV-G 2.0].)

• Is there any malfunction?

Yes

Replace the MAF sensor/IAT sensor No.1, then go to Step 13.

(See MASS AIR FLOW (MAF) SENSOR/INTAKE AIR TEMPERATURE (IAT) SENSOR NO.1 REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

No

Go to the next step.

12

• Remove the air cleaner element with the engine is running.

  (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

• Does the engine speed increase?

Yes

Inspect the air cleaner element.

(See AIR CLEANER ELEMENT INSPECTION [SKYACTIV-G 2.0].)

• If there is any malfunction:

• Clean or replace the air cleaner element, then go to the next step.

  (See AIR CLEANER ELEMENT REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

• If there is no malfunction:

• Go to the next step.

No

Go to the next step.

13

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

  (See CLEARING DTC [PCM (SKYACTIV-G 2.0)].)

• Implement the repeatability verification procedure.

  (See Repeatability Verification Procedure.)

• Perform the Pending Trouble Code Access Procedure.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Is the PENDING CODE/DTC P2096:00 or P2097:00 also present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Go to the next step.

No

Go to the next step.

14

• Is any other DTC or pending code stored?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

DTC troubleshooting completed.