So this is been a on going deliema w/ my 02 5.5. It has had this P1147 code which is the b1s2 code and now it has a P0139 code. Ive done a little research and found out the the 1147 is precat (thats soonerfan) and im not exactly sure about the P0139. I'm going to have to replace these o2 sensors sooner or later so i might as well do it now. I know i have to order the o2 with the white plug according to the TSB (see link below) but what esle do i have to purchase? Do i need 2 o2 sensors? 1 o2 sensor? im confused about what to do from here on out.

here is the link for the TSB i found under the engine light sticky

http://maxima.theowensfamily.com/tsb/NTB02-051a.pdf

and the picture of the exhaust system is on page 5 of 9 on the PDF file.

Thanks for your left guys.

 

both codes are for the same sensor (Bank 1 Sensor 2)...its that one in the precat.
you are correct, you need the white one

1147 - Max Voltage Monitoring
0139 - Circuit Slow Response

 

okay cool. you said about $116 bucks shipped from DaveB right? Yeah i noticed that my dte would fluctuate a lot. I think it might be due to the different readings. thanks again sooner.

 

yeah, $116 shipped
gas mileage suffers when an O2 sensor is bad

 

yeah i figured the gas mileage would and it sucks to throw my money in the trash over a simple o2 sensor. is the part number for that o2 226A0-5Y701? or something else because im going to call DaveB tomorrow to order this plus the cabin filter and pcv valve. it says white on the color for the connector but when i looked under my hood by the exhaust manifold, i didnt see a white colored plug? so am i missing something or is it different colors for the 3.5s??

 

i dont know the part #. just call daveb and ask for the Bank 1 Sensor 2, he will know what you need.
its the wire covering thats white...not the wire harness. i wondered the same thing.

 

front 02 sensors only. rears monitor front.just to clarify

 

okay that color thing totally confused me and i thought it was the color of the plug. do o2 sensors usally go bad after a certain mileage interval? because i looked at the stickys and it seems like a commom problem for this perticular sensor to go out along with the others. now on the TSB it says something about the air meter and that it needs a new one and a reprogramming, im assuming the air meter is the MAF and it needs to reprogrammed at the dealer but i think im going to skip the reprogramming. Are their any actual benefits from the reprogramming?

 

well this is a rear sensor and my mileage suffered

 

bank 1 sensor 2 is not a rear 02. bank 1 refers to front oxygen sensors or precat as metioned above in your posts

 

bank 1 is the back 3 cylinders
bank 2 is the front 3 cylinders
sensor 1 is a front sensor
sensor 2 is a rear sensor

Bank 1 Sensor 2 = the rear sensor on the back cylinders

you wanna keep arguing?

 

Nissan says it will use the rear sensors to adjust the air/fuel mixture under certain conditions, so that makes sense.

 

so would it be smart to get it reprogrammed?

 

i didnt and havent had a problem

 

sooner, how long has it been since you have replaced it?

 

about 2K miles

 

kdaullary,
the sensor we are talking about is clearly a REAR sensor

 

how much does the dealer want to charge for the reprogram and what all do they do? do they just reset the ecu or do they calibrate the ecu for the new o2 ?

 

so glad I have the extended warranty Free o2 sensors till 130k FTW

 

warranty did you get? I have the same. (139k)

 

They reprogram the ECM with the latest code. Usually it will cost at least an hour of labor.

 

but is it something like they just clear the ses and thats it or do they go more in depth then that? the only reason i ask is because i have a local shop and if its just a simple reset then i can have them do it for free.

 

i had advance auto reset mine and like i said, no problems

 

Think of it like BIOS upgrade on your PC or an Microsoft Service Pack upgrade to your PC's operating system when the dealer REPROGRAMS the ECM. The dealer loads updated code into the ECM.

After I had both my rear sensors replaced at another shop, I got my local dealer to do mine as per the TSB for free because I caught them cold screwing me on other service.

But as soonerfan said, you might get away with a simple ECM reset and be just fine like he is.

 

.....................

 

okay so i called up daveb and ordered the white wire o2 from him as well as the pcv valve. all in all it came to about $128 shipped which is not bad at all. he said that he's sold out now because appearantly he had a high volume request for this certain o2 so hes going to get one from nissan and have it to be in the next 5-6 days. He was very helpful and it was a good first buy from the well known daveb. thanks dave.

 

oops sorry i misread my diagram on the o2 sensor location.
however the rear only monitering the front is open for debate. Nissan does say they are there for monitor purpases but even the techs i work with are not entirely sure so..... when mine whent bad i replaced it same day so i dont know from personal experience on effects of fuel mileage.

 

and nissan's crappiness continues......i just had this same error..............even though my car is under 46,000 miles...............im going to try to get it warrantied...

 

O2 sensors go out...they are a wear item like brake pads. this isnt a "saga"

 

quality on nissan is decreaseing........

but to make u feel beter..ill edit my Original post and change it to "nissan's crappiness cont"

 

I'm not sure what your point is but, Nissan doesn't manufacture the O2 sensors, Bosch does. .

 

nissan doesnt make the sensors. and like i said, O2 sensors go bad. how is this nissan's fault? or even Bosch's fault

 

point being......4th gen max were better than 5th...........in terms of quality of O2s, suspension, engine probs, less rumbling noise...etc.....

 

then please get a 4th gen and stop blaming people for a WEAR ITEM...wearing out.
you gonna blame nissan when you have to change your oil, brake pads, or tires?

 

I disagree, since both mine (95 & 03) have treated me extremely well. Get another car if you don't like yours. Seems like a logical action.

 

hahahah yea i regret gettin rid of my 4th gen and as far as oil......isn't there an issue going on with oil burning....is that normal wear/tear?...and for brakes warped rotors? i guess warped is normal wear/tear...

 

no doubt the 03's are good...i have both 03 and 02.......and unfortunately 02 is the one with the issues...