Nissan Frontier D22. Manual - part 580

DTC P0139, P0159 HO2S2

EC-1423

[VG33ER]

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EC

2. 

CLEAR THE SELF-LEARNING DATA

 WITH CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode
with CONSULT-II.

3.

Clear the self-learning control coefficient by touching “CLEAR”.

4.

Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?

 WITHOUT CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF.

3.

Disconnect mass air flow sensor harness connector, and restart
and run engine for at least 5 seconds at idle speed.

4.

Stop engine and reconnect mass air flow sensor harness connector.

5.

Make sure DTC P0102 is displayed.

6.

Erase the DTC memory. Refer to 

EC-1233, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC

INFORMATION"

 .

7.

Make sure DTC P0000 is displayed.

8.

Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?

Yes or No

Yes

>> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to 

EC-1427

  or 

EC-

1435

 .

No

>> GO TO 3.

3. 

CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between HO2S2 terminal 4 and engine ground.
Refer to Wiring Diagram.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness for open between heated oxygen sensor 2 and engine ground.

>> Repair open circuit or short to power in harness or connectors.

SEF968Y

Continuity should exist.

EC-1424

[VG33ER]

DTC P0139, P0159 HO2S2

5. 

CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check heated oxygen sensor 2 harness protector color.

3.

Disconnect corresponding heated oxygen sensor 2 harness
connector.

4.

Disconnect ECM harness connector.

5.

Check harness continuity between ECM terminal and HO2S2
terminal as follows.
Refer to Wiring Diagram.

6.

Check harness continuity between ECM terminal or HO2S2 terminal and ground as follows.
Refer to Wiring Diagram.

7.

Also check harness for short to power.

OK or NG

OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

PBIB1423E

DTC

Terminals

Bank

ECM

Sensor

P0139

56

1

Bank 1 

P0159

57

1

Bank 2

Continuity should exist.

DTC

Terminals

Bank

ECM or sensor

Ground

P0139

56 or 1

Ground

Bank 1 

P0159

57 or 1 

Ground

Bank 2

Continuity should not exist.

BBIA0187E

DTC P0139, P0159 HO2S2

EC-1425

[VG33ER]

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6. 

CHECK HEATED OXYGEN SENSOR 2

 With CONSULT-II

1.

Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-II.

2.

Start engine and warm it up to the normal operating temperate.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

5.

Let engine idle for 1 minute.

6.

Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.

7.

Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to 

±25%.

“HO2S2 (B1)/(B2)” should be above 0.62V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.48V at least once when the “FUEL INJECTION” is 

−25%.

CAUTION:

●

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m
(19.7 in) onto a hard surface such as a concrete floor; use a new one.

●

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

OK or NG

OK

>> GO TO 8.

NG

>> Replace malfunctioning heated oxygen sensor 2.

SEF662Y

SEF989RD

EC-1426

[VG33ER]

DTC P0139, P0159 HO2S2

7. 

CHECK HEATED OXYGEN SENSOR 2

 Without CONSULT-II

1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Stop vehicle with engine running.

3.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.

4.

Let engine idle for 1 minute.

5.

Set voltmeter probes between ECM terminal 56 [HO2S2 (B1)
signal] or 57 [HO2S2 (B2) signal] and engine ground.

6.

Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.62V at least once during this
procedure.
If the voltage is above 0.62V at step 6, step 7 is not neces-
sary.

7.

Keep vehicle at idling for 10 minutes, then check voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in D
position with “OD” OFF (A/T), 3rd gear position (M/T).
The voltage should be below 0.48V at least once during this procedure.

8.

If NG, replace heated oxygen sensor 2.

CAUTION:

●

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.

●

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

OK or NG

OK

>> GO TO 8.

NG

>> Replace malfunctioning heated oxygen sensor 2.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

Removal and Installation

UBS00DVY

HEATED OXYGEN SENSOR 2

Refer to 

EX-3, "EXHAUST SYSTEM"

 .

SEF922UA