DTC INFINITI QX56 2007 Factory Service Manual

INFINITI QX56 2007 Factory Service Manual QX56 2007 INFINITI INFINITI https://www.carmanualsonline.info/img/42/57029/w960_57029-0.png INFINITI QX56 2007 Factory Service Manual

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INFINITI QX56 2007  Factory Service Manual EC-270
< SERVICE INFORMATION >
DTC P0138, P0158 HO2S2
DTC P0138, P0158 HO2S2
Component DescriptionINFOID:0000000003531774
The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the

Page 1354 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P0138, P0158 HO2S2
EC-271
< SERVICE INFORMATION >
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DTC Confirmation ProcedureINFOID:0000000003531777
Perform PROCEDURE FOR MALFUNCTION A first.
If DTC cannot be conf

Page 1355 of 3061

INFINITI QX56 2007  Factory Service Manual EC-272
< SERVICE INFORMATION >
DTC P0138, P0158 HO2S2
9. Start engine and following the instruction of CONSULT-II.
NOTE:
It will take at most 10 minutes until “COMPLETED” is displayed.
10. Make su

Page 1356 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P0138, P0158 HO2S2
EC-273
< SERVICE INFORMATION >
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Wiring DiagramINFOID:0000000003531779
BANK 1
Specification data are reference values and are measured between each

Page 1357 of 3061

INFINITI QX56 2007  Factory Service Manual EC-274
< SERVICE INFORMATION >
DTC P0138, P0158 HO2S2
TER-
MI-
NAL 
NO.WIRE 
COLORITEM CONDITION DATA (DC Voltage)
6GRHeated oxygen sensor 2 
heater (bank 1)[Engine is running]
• Engine speed: Below

Page 1358 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P0138, P0158 HO2S2
EC-275
< SERVICE INFORMATION >
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BANK 2
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not

Page 1359 of 3061

INFINITI QX56 2007  Factory Service Manual EC-276
< SERVICE INFORMATION >
DTC P0138, P0158 HO2S2
Diagnosis Procedure
INFOID:0000000003531780
PROCEDURE FOR MALFUNCTION A
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and reti

Page 1360 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P0138, P0158 HO2S2
EC-277
< SERVICE INFORMATION >
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1. Disconnect heated oxygen sensor 2 harness connector.
2. Disconnect ECM harness connector.
3. Check harness cont

Page 1361 of 3061

INFINITI QX56 2007  Factory Service Manual EC-278
< SERVICE INFORMATION >
DTC P0138, P0158 HO2S2
Refer to EC-280, "Component Inspection".
OK or NG
OK >> GO TO 6.
NG >> Replace malfunctioning heated oxygen sensor 2.
6.CHECK INTERMITTENT INCIDEN

Page 1362 of 3061

INFINITI QX56 2007  Factory Service Manual DTC P0138, P0158 HO2S2
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3. Disconnect mass air flow sensor harness connector, and restart
and run engine for at least 5 seconds at idle sp