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DTC P0134 HO2S1
EC-167
[QG (WITH EURO-OBD)]
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3. Check the following with engine speed held at 2,000 rpm con-
stant under no load.
–The voltage does not remain in the range of 0.2 to 0.4V.
4. If NG, go to EC-169, "
Diagnostic Procedure" .
MBIB0018E
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EC-168
[QG (WITH EURO-OBD)]
DTC P0134 HO2S1
Wiring Diagram
EBS00K65
YEC281A
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![NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0134 HO2S1
EC-169
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminal NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0134 HO2S1
EC-169
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminal](/manual-img/5/57350/w960_57350-498.png)
DTC P0134 HO2S1
EC-169
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic ProcedureEBS00K66
1.INSPECTION START
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 2.
2.CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect heated oxygen sensor 1 harness connector.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 74 and HO2S1
terminal 3. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
3.CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 35 and HO2S1 terminal 2.
Refer to Wiring Diagram.
2. Check harness continuity between ECM terminal 35 or HO2S1 terminal 2 and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
35 W Heated oxygen sensor 1[Engine is running]
●Warm-up condition
●Engine speed is 2,000 rpm.0 - Approximately 1.0V
(Periodically change)
74 BHeated oxygen sensor
ground[Engine is running]
●Idle speedApproximately 0V
MBIB0095E
Continuity should exist.
MBIB0091E
Continuity should exist.
Continuity should not exist.
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![NISSAN ALMERA N16 2003 Electronic Repair Manual EC-170
[QG (WITH EURO-OBD)]
DTC P0134 HO2S1
4. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-170, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace heated oxygen sensor 1.
5. CHECK IN NISSAN ALMERA N16 2003 Electronic Repair Manual EC-170
[QG (WITH EURO-OBD)]
DTC P0134 HO2S1
4. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-170, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace heated oxygen sensor 1.
5. CHECK IN](/manual-img/5/57350/w960_57350-499.png)
EC-170
[QG (WITH EURO-OBD)]
DTC P0134 HO2S1
4. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-170, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace heated oxygen sensor 1.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-109, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00K67
HEATED OXYGEN SENSOR 1
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-
II.
3. Select “HO2S1 (B1)” and “HO2S1 MNTR (B1)”.
4. Hold engine speed at 2,000 rpm under no load during the follow-
ing steps.
5. Touch “RECORD” on CONSULT-II screen.
6. Check the following.
●“HO2S1 MNTR (B1)” in “DATA MONITOR” mode changes
from “RICH” to “LEAN” to “RICH” 5 times in 10 seconds.
5 times (cycles) are counted as shown at right.
●“HO2S1 (B1)” voltage goes above 0.6V at least once.
●“HO2S1 (B1)” voltage goes below 0.3V at least once.
●“HO2S1 (B1)” voltage never exceeds 1.0V.
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.
SEF646Y
SEF217YA
SEF648Y
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EC-171
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●Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897 NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0134 HO2S1
EC-171
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●Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897](/manual-img/5/57350/w960_57350-500.png)
DTC P0134 HO2S1
EC-171
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●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.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 (HO2S1 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 one time.
●The minimum voltage is below 0.3V at least one 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
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.
Removal and InstallationEBS00K68
HEATED OXYGEN SENSOR 1
Refer to EM-19, "EXHAUST MANIFOLD AND CATALYTIC CONVERTER" .
MBIB0018E
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![NISSAN ALMERA N16 2003 Electronic Repair Manual EC-172
[QG (WITH EURO-OBD)]
DTC P0138 HO2S2
DTC P0138 HO2S2
PFP:226A0
Component DescriptionEBS00K69
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level NISSAN ALMERA N16 2003 Electronic Repair Manual EC-172
[QG (WITH EURO-OBD)]
DTC P0138 HO2S2
DTC P0138 HO2S2
PFP:226A0
Component DescriptionEBS00K69
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level](/manual-img/5/57350/w960_57350-501.png)
EC-172
[QG (WITH EURO-OBD)]
DTC P0138 HO2S2
DTC P0138 HO2S2
PFP:226A0
Component DescriptionEBS00K69
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
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 ModeEBS00K6A
Specification data are reference values.
On Board Diagnosis LogicEBS00K6B
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.
SEF327R
MONITOR ITEM CONDITION SPECIFICATION
HO2S2 (B1)
●Engine: After warming up
●Keeping the engine speed
between 3,500 and 4,000 rpm
for one minute and at idle for
one minute under no loadRevving engine from idle to 3,000
rpm quickly.0 - 0.3V ←→ Approx. 0.6 - 1.0V
HO2S2 MNTR (B1)
●Engine: After warming up
●Keeping the engine speed
between 3,500 and 4,000 rpm
for one minute and at idle for
one minute under no loadRevving engine from idle to 3,000
rpm quickly.LEAN ←→ RICH
SEF305UA
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0138
0138Heated oxygen sensor 2
circuit high voltageAn excessively high voltage from the sensor
is sent to ECM.
●Harness or connectors
(The sensor circuit is open or shorted.)
●Heated oxygen sensor 2
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EC-173
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DTC Confirmation ProcedureEBS00K6C
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
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EC-173
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DTC Confirmation ProcedureEBS00K6C
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has be](/manual-img/5/57350/w960_57350-502.png)
DTC P0138 HO2S2
EC-173
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DTC Confirmation ProcedureEBS00K6C
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 10 seconds before conducting the next test.
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 temperature.
3. Turn ignition switch “OFF” and wait at least 10 seconds.
4. Start engine and keep the engine speed at between 3,500 and
4,000 rpm for least one minute under no load.
5. Let engine idle for two minutes.
6. If 1st trip DTC is detected, go to EC-175, "
Diagnostic Procedure"
.
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 one minute under no
load.
4. Let engine idle for two 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 one minute under no
load.
7. Let engine idle for two minutes.
8. Select “Mode 3” with GST.
9. If NG, go to EC-175, "
Diagnostic Procedure" .
●When using GST, “DTC Confirmation Procedure” should be performed twice as much as when
using CONSULT-II because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis.
Therefore, using CONSULT-II is recommended.
SEF174Y
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EC-174
[QG (WITH EURO-OBD)]
DTC P0138 HO2S2
Wiring Diagram
EBS00K6D
YEC282A