2006 NISSAN VERSA Workshop Service Repair Manual

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NISSAN VERSA 2006 Workshop Service Repair Manual EC-256Revision: June 2006
DTC P0137 HO2S2
2007 Versa
6. Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)” should be above 0.68V at least once when the

EC-256Revision: June 2006
DTC P0137 HO2S2
2007 Versa
6. Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)” should be above 0.68V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)” should be below 0.18V 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.
Without CONSULT-II
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 1 minute.
5. Set voltmeter probes between ECM terminal 50 (HO2S2 signal) and 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 0.68V at least once during this
procedure.
If the voltage is above 0.68V at step 6, step 7 is not neces-
sary.
7. Keep vehicle 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, CVT), D position (CVT) or 3rd gear position
(M/T).
The voltage should be below 0.18V 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.
Removal and InstallationUBS00QFM
HEATED OXYGEN SENSOR 2
Refer to EM-21, "EXHAUST MANIFOLD" .
PBIB2534E
PBIB2996E

Page 1426 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual DTC P0138 HO2S2
EC-257
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DTC P0138 HO2S2PFP:226A0
Component DescriptionUBS00QFN
The heated oxygen sensor 2, after three way catalyst (manifold),
m

Page 1427 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual EC-258Revision: June 2006
DTC P0138 HO2S2
2007 Versa
DTC Confirmation ProcedureUBS00QFQ
Perform PROCEDURE FOR MALFUNCION A first.
If DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
NOTE:

EC-258Revision: June 2006
DTC P0138 HO2S2
2007 Versa
DTC Confirmation ProcedureUBS00QFQ
Perform PROCEDURE FOR MALFUNCION A first.
If DTC cannot be confirmed, perform PROCEDURE FOR MALFUNCTION B.
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.
PROCEDURE FOR MALFUNCTION A
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 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-262, "
PROCEDURE FOR
MALFUNCTION A" .
With GST
Follow the procedure “With CONSULT-II” above.
PROCEDURE FOR MALFUNCTION B
With CONSULT-II
TESTING CONDITION:
For the best results, perform DTC WORK SUPPORT at a temperature of 0 to 30°C (32 to 86°F).
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 1 minute.
6. Make sure that “COOLAN TEMP/S” indicates more than 70°C
(158°F).
If not, warm up engine and go to next step when “COOLAN
TEMP/S” indication reaches to 70°C (158°F).
7. Open engine hood.
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0138
0138Heated oxygen sensor 2
circuit high voltageA)An excessively high voltage from the
sensor is sent to ECM.
Harness or connectors
(Heated oxygen sensor 2 circuit is open
or shorted.)
Heated oxygen sensor 2
B)The minimum voltage from the sensor
is not reached to the specified volt-
age.
Harness or connectors
(Heated oxygen sensor circuit is open or
shorted.)
Heated oxygen sensor 2
Fuel pressure
Fuel injector
SEF 1 74 Y
SEF 1 74 Y

Page 1428 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual DTC P0138 HO2S2
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8. Select “HO2S2 (B1) P1146” (for DTC P0138) of “HO2S2” in “DTC WORK SUPPORT” mode with CON-
SULT-II.
9. Star

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NISSAN VERSA 2006 Workshop Service Repair Manual EC-260Revision: June 2006
DTC P0138 HO2S2
2007 Versa
Wiring DiagramUBS00QFS
BBWA2629E

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NISSAN VERSA 2006 Workshop Service Repair Manual DTC P0138 HO2S2
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Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CO

Page 1431 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual EC-262Revision: June 2006
DTC P0138 HO2S2
2007 Versa
Diagnostic ProcedureUBS00QFT
PROCEDURE FOR MALFUNCTION A
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten engine sc

Page 1432 of 2896

NISSAN VERSA 2006 Workshop Service Repair Manual DTC P0138 HO2S2
EC-263
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4. CHECK HO2S2 CONNECTOR FOR WATER
Check connectors for water.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness or

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