DTC P0140-00: O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2) [07/2015 - 08/2018]: Procedure

PURPOSE: VERIFY CONNECTOR CONNECTIONS

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

Enter the following menus: Powertrain / Engine / Data List / Heated Exhaust Gas Oxygen Sensor Heater (bank 1, sensor 2) and Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 2)

Refer to ON-BOARD DIAGNOSTIC TEST [07/2015 - ]

Powertrain > Engine > Data List

Tester Display
Heated Exhaust Gas Oxygen Sensor Heater (bank 1, sensor 2)
Heated Exhaust Gas Oxygen Sensor Heater (bank 1, sensor 2)
Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 2)

When the following parts are shaken, does the PID value include a PID item which has changed?

HO2S
ECM

Result

Result
Yes
No

Result:

Yes

See step 25

Result:

See step 2

PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY HO2S

Connect the Techstream to the DLC3.
Start the engine and idle it.
Turn the Techstream on.

Enter the following menus: Powertrain / Engine / Data List / Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 2).

Refer to ON-BOARD DIAGNOSTIC TEST [07/2015 - ]

Powertrain > Engine > Data List

Tester Display
Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 2)

Is the Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 2) PID value normal?

Refer to INSPECTION [07/2015 - 08/2018]

Result

Result
Yes
No

Result:

See step 4

Result:

Yes

See step 3

PURPOSE: VERIFICATION IF MALFUNCTION CAUSED BY HO2S HEATER

Connect the Techstream to the DLC3.
Start the engine and idle it.
Turn the Techstream on.

Enter the following menus: Powertrain / Engine / Data List / Heated Exhaust Gas Oxygen Sensor Heater (bank 1, sensor 2).

Refer to ON-BOARD DIAGNOSTIC TEST [07/2015 - ]

Powertrain > Engine > Data List

Tester Display
Heated Exhaust Gas Oxygen Sensor Heater (bank 1, sensor 2)
Heated Exhaust Gas Oxygen Sensor Heater (bank 1, sensor 2)

Is the Heated Exhaust Gas Oxygen Sensor Heater (bank 1, sensor 2) PID value normal?

Refer to INSPECTION [07/2015 - 08/2018]

Result

Result
Yes
No

Result:

See step 12

Result:

Yes

See step 4

PURPOSE: INSPECT HO2S CONNECTOR CONDITION

Switch the ignition off.
Disconnect the HO2S connector.
Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

Is there any malfunction?

Result

Result
Yes
No

Result:

Yes

See step 24

Result:

See step 5

PURPOSE: INSPECT ECM CONNECTOR CONDITION

Disconnect the ECM connector.
Inspect for poor connection (such as damaged/pulled-out pins, corrosion).

Is there any malfunction?

Result

Result
Yes
No

Result:

Yes

See step 23

Result:

See step 6

PURPOSE: INSPECT HO2S SIGNAL CIRCUIT FOR SHORT TO GROUND

Verify that the HO2S and ECM connectors are disconnected.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
E4-2 - Body ground	Always	10 kΩ or higher

Result

Result
Yes
No

Result:

See step 22

Result:

Yes

See step 7

PURPOSE: INSPECT HO2S CIRCUIT FOR OPEN CIRCUIT

Verify that the HO2S and ECM connectors are disconnected.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
E4-2 - A42-41	Always	Below 1 Ω

Result

Result
Yes
No

Result:

See step 21

Result:

Yes

See step 8

PURPOSE: INSPECT INSTALLATION OF HO2S

Verify the installation condition of the HO2S (installation angle, tightening torque value).
Refer to INSTALLATION [07/2015 - ]

Is the HO2S installed securely?

Result

Result
Yes
No

Result:

See step 20

Result:

Yes

See step 9

PURPOSE: DETERMINE INTEGRITY OF HO2S

Reconnect all disconnected connectors.
Inspect the HO2S.
Refer to INSPECTION [07/2015 - 08/2018]

Is there any malfunction?

Result

Result
Yes
No

Result:

Yes

See step 19

Result:

See step 10

PURPOSE: VERIFY IF MALFUNCTION RELATED TO EMISSION SYSTEM AFFECTS HO2S SIGNAL

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

Is there any malfunction?

Result

Result
Yes
No

Result:

Yes

See step 18

Result:

See step 11

PURPOSE: VERIFY IF MALFUNCTION RELATED TO ENGINE COMPRESSION AFFECTS DIAGNOSTIC RESULTS

Inspect the engine compression.
Refer to INSPECTION [07/2015 - 08/2019]

Are compression pressures within specification?

Result

Result
Yes
No

Result:

See step 17

Result:

Yes

See step 12

PURPOSE: DETERMINE INTEGRITY OF HO2S HEATER

Inspect the HO2S heater.
Refer to INSPECTION [07/2015 - 08/2018]

Is there any malfunction?

Result

Result
Yes
No

Result:

Yes

See step 16

Result:

See step 13

PURPOSE: VERIFICATION OF VEHICLE REPAIR COMPLETION

Always reconnect all disconnected connectors.
Clear the DTC from the ECM memory using the Techstream.
Refer to CLEARING DTC [07/2015 - ]

Powertrain > Engine > Clear DTCs
Implement the repeatability verification procedure.
Perform the Pending Trouble Code Access Procedure.
Refer to ON-BOARD DIAGNOSTIC TEST [07/2015 - ]

Powertrain > Engine > Trouble Codes

Is the PENDING CODE for this DTC present?

Result

Result
Yes
No

Result:

Yes

See step 15

Result:

See step 14

PURPOSE: VERIFY IF THERE IS ANY OTHER MALFUNCTION

Is any other DTC or pending code stored?

Result

Result
Yes
No

Result:

DTC TROUBLESHOOTING COMPLETED.

Result:

Yes

GO TO THE APPLICABLE DTC INSPECTION.

Refer to DIAGNOSTIC TROUBLE CODE CHART [07/2015 - 08/2018]

REPEAT THE INSPECTION FROM STEP 4.

If the malfunction recurs, replace the ECM.
Refer to REMOVAL [07/2015 - ]

Go to the next step.

Result

Proceed to
NEXT

Result:

See step 4

REPLACE THE HO2S.

Refer to REMOVAL [07/2015 - ]

Then go to the next step.

Result

Proceed to
NEXT

Result:

See step 13

REPLACE OR OVERHAUL THE ENGINE.

Then go to the next step.

Result

Proceed to
NEXT

Result:

See step 13

REPAIR OR REPLACE THE MALFUNCTIONING PART ACCORDING TO THE INSPECTION RESULTS.

Then go to the next step.

Result

Proceed to
NEXT

Result:

See step 13

REPLACE THE HO2S.

Refer to REMOVAL [07/2015 - ]

Then go to the next step.

Result

Proceed to
NEXT

Result:

See step 13

RETIGHTEN THE HO2S.

Refer to INSTALLATION [07/2015 - ]

Then go to the next step.

Result

Proceed to
NEXT

Result:

See step 13

REFER TO THE WIRING DIAGRAM AND VERIFY WHETHER OR NOT THERE IS A COMMON CONNECTOR BETWEEN HO2S TERMINAL E4-2 AND ECM TERMINAL A42-41.

If there is a common connector:

Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.
Repair or replace the malfunctioning part.

If there is no common connector:

Repair or replace the wiring harness which has an open circuit.

Go to the next step.

Result

Proceed to
NEXT

Result:

See step 13

REFER TO THE WIRING DIAGRAM AND VERIFY WHETHER OR NOT THERE IS A COMMON CONNECTOR BETWEEN HO2S TERMINAL E4-2 AND ECM TERMINAL A42-41.

If there is a common connector:

Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.
Repair or replace the malfunctioning part.

If there is no common connector:

Repair or replace the wiring harness which has a short to ground.

Go to the next step.

Result

Proceed to
NEXT

Result:

See step 13

REPLACE THE ECM.

Refer to REMOVAL [07/2015 - ]

Then go to the next step.

Result

Proceed to
NEXT

Result:

See step 13

REPLACE THE HO2S.

Refer to REMOVAL [07/2015 - ]

Then go to the next step.

Result

Proceed to
NEXT

Result:

See step 13

REPAIR OR REPLACE THE APPLICABLE CONNECTOR PARTS.

Go to the next step.

Result

Proceed to
NEXT

Result:

See step 13