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Forums Nissan Models Maxima P1147 HO2S-12 (Bank 1 Sensor 2) Rich Shift Monitoring (Bank 1) '02 MAXIMA
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Old 08-24-2008, 03:18 PM
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Unhappy P1147 HO2S-12 (Bank 1 Sensor 2) Rich Shift Monitoring (Bank 1) '02 MAXIMA

I just had this error read after I was driving my vehicle @ 80+ mph to test to see if I got a error code after installing 3 of the 6 new spark plugs I got. The 3 that were installed are the 3 are the 3 closest to the radiator.

P1147 HO2S-12 (Bank 1 Sensor 2) Rich Shift Monitoring (Bank 1)

What is this and how do I fix it?

This is what my report from y OBD2 reader pulled up:

Basic Report [ Print ]
Vehicle Information 8/24/2008 4:04:05 PM
VIN: JN1DA31D22T443207 Year: 2002 Manufacturer: Nissan Motor Co. Ltd. Make: Nissan Model: Maxima Engine Size: V6, 3.5L Transmission: Standard Trim Level: SE; GLE; GXE License Plate: 126-MUJ Mileage: 81000 DTC Information

Stored Codes P1147 HO2S-12 (Bank 1 Sensor 2) Rich Shift Monitoring (Bank 1) Diagnostic Information

Freeze Frame Information Parameter Description Value DTC for which Freeze Frame was Stored P1147 Fuel System 1 Status Closed Loop Fuel System 2 Status Closed Loop Calculated LOAD Value 51.76 % Engine Coolant Temp 194.00 F Short Term Fuel Trim - Bank 1 -5.47 % Long Term Fuel Trim - Bank 1 3.91 % Short Term Fuel Trim - Bank 2 1.56 % Long Term Fuel Trim - Bank 2 3.91 % Engine RPM 2,750.00 rpm Vehicle Speed Sensor 82.02 mph Monitor Information Monitor Name Monitor Icon Status MIL
ON Misfire Monitoring Complete Fuel System Monitoring Complete Comprehensive Component Monitoring Complete Catalyst Monitoring Complete Heated Catalyst Monitoring Not Supported Evaporative System Monitoring Complete Secondary Air System Monitoring Not Supported A/C System Refrigerant Monitoring Not Supported Oxygen Sensor Monitoring Complete Oxygen Sensor Heater Monitoring Complete EGR System Monitoring Not Supported

Last edited by LovePhD; 08-24-2008 at 03:19 PM. Reason: mispelling and grammar
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Old 08-24-2008, 03:42 PM
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you should have changed all 6 sparks thats what recommended by the manual and while u are doing it might aswell do the other side which is a lil harder. thats your 02 sensor i got a chart on which one it is, but im sure the Nissan Specialist has the diagram for u check this out 2000 2002 NISSAN MAXIMA; MIL "ON" WITH REAR O2 SENSOR DTC P0138/P0139/P0140/P0158/P0159/P0160/P1147/P1167
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Last edited by sergey85; 08-24-2008 at 03:48 PM.
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Old 08-25-2008, 04:29 AM
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Your 02sensor has failed and needs to be replaced. also you will have to have a nissan dealer determine if you need to have the ECM reprogrammed ( done by VIN#) .I dont understand why you didn't replace the other spark plugs if you were trying to determine if the problem was resolved. There were some issues with 02 sensors on that model along with coils going bad,so let a nissan tech resolve your problems. PS. i hope you installed NGK spark plugs in your Max. Good luck.
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Old 08-25-2008, 11:20 AM
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Talking

Ok thanks. The reason I didn't replace the back 3 (the ones under the intake manifold) is because I didn't want to remove the manifold and risk messing it up.

Thank you both for your insight and I had already planned on getting the others installed by a mechanic.


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