Nissan Frontier D22. Manual - part 576

DTC P0134, P0154 HO2S1

EC-1407

[VG33ER]

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4. 

CHECK HEATED OXYGEN SENSOR 1

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Set voltmeter probes between ECM terminal 50 [HO2S1 (B1) signal] or 51 [HO2S1 (B1) signal] and
engine ground.

3.

Check the following with engine speed held at 2,000 rpm con-
stant under no load.

●

The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V more
than 5 times within 10 seconds.

●

The maximum voltage is over 0.6V at least 1 time.

●

The minimum voltage is below 0.3V at least 1 time.

●

The voltage never exceeds 1.0V.

1 time: 0 - 0.3V 

→ 0.6 - 1.0V → 0 - 0.3V

2 times: 0 - 0.3V 

→ 0.6 - 1.0V → 0 - 0.3V → 0.6 - 1.0V → 0 - 0.3V

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 5.

NG

>> Replace malfunctioning heated oxygen sensor 1.

5. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

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>> INSPECTION END.

Removal and Installation

UBS00DVJ

HEATED OXYGEN SENSOR 1

Refer to 

EM-80, "OUTER COMPONENT PARTS"

 .

PBIB2157E

EC-1408

[VG33ER]

DTC P0138, P0158 HO2S2

DTC P0138, P0158 HO2S2

PFP:226A0

Component Description

UBS00DVK

The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the heated oxygen sensor 1 are
shifted, the air-fuel ratio is controlled to stoichiometric, by the signal
from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.

CONSULT-II Reference Value in Data Monitor Mode

UBS00DVL

Specification data are reference values.

On Board Diagnosis Logic

UBS00DVM

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the heated oxygen sensor 1. The oxygen
storage capacity before the three way catalyst (manifold) causes the
longer switching time. To judge the malfunctions of heated oxygen
sensor 2, ECM monitors whether the voltage is unusually high during
the various driving condition such as fuel-cut.

DTC Confirmation Procedure

UBS00DVN

CAUTION:

Always drive vehicle at a safe speed.

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.

SEF327R

MONITOR ITEM

CONDITION

SPECIFICATION

HO2S2 (B1)
HO2S2 (B2)

●

Warm-up condition

●

After keeping engine speed 
between 3,500 and 4,000 rpm for 
1 minute and at idle for 1 minute 
under no load.

Revving engine from idle up to 
3,000 rpm quickly

0 - 0.3V 

←→ Approx. 0.6 - 1.0V

HO2S2 MNTR 
(B1)
HO2S2 MNTR 
(B2)

LEAN 

←→ RICH

PBIB1848E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0138
(Bank 1)

Heated oxygen sensor 
2 circuit high voltage

An excessively high voltage from the sensor is 
sent to ECM.

●

Harness or connectors
(The sensor circuit is open or shorted)

●

Heated oxygen sensor 2

P0158
(Bank 2)

DTC P0138, P0158 HO2S2

EC-1409

[VG33ER]

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 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 tempera-
ture.

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 2 minutes.

6.

If 1st trip DTC is detected, go to 

EC-1413, "Diagnostic Proce-

dure"

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 WITH GST

1.

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

2.

Turn ignition switch OFF and wait at least 10 seconds.

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 2 minutes.

5.

Turn ignition switch OFF and wait at least 10 seconds.

6.

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

7.

Let engine idle for 2 minutes.

8.

Select MODE 3 with GST.

9.

If DTC is detected, go to 

EC-1413, "Diagnostic Procedure"

 .

SEF174Y

EC-1410

[VG33ER]

DTC P0138, P0158 HO2S2

Wiring Diagram

UBS00DVO

BANK 1

BBWA1079E