Help with P0174 please!
CCT-we call down the rain
Joined: Apr 2007
Posts: 1,179
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From: Avondale, AZ
If it were me, I would swap out both O2 sensors from nissan, clear codes and reset ECU. I would be surprised that a reprogram would be needed, as the parameters are already set in the ECU. I am not sure, but that is my thinking.
You could swap the 2 sensors, and see if the code changes to the other bank after the swap, that would tell you for sure if it is a bad sensor. If it is I would replace both at the same time.
You could swap the 2 sensors, and see if the code changes to the other bank after the swap, that would tell you for sure if it is a bad sensor. If it is I would replace both at the same time.
Joined: Jul 2002
Posts: 4,325
Likes: 4
From: Edmonton, Alberta, Canada
Originally Posted by sloppymax
i would agree with the bosch vs ngk but only with respect to spark plugs. if im not mistaken, bosch is oem for nissan. i have used bosch and walker brand o2 sensor on my past VQ with great results. i have never heard of need to program after an o2 sensor replacement. the only instance i can think of in my experience was an ecu flash on the maf after nissan replaced the previous part number with an updated version. if you have a good amount of miles on the car then it wouldnt hurt to replace an o2 considering you can get one less than 100 bucks from o2sensors.com most likely either bosch or walker.
is there any way you can find someone local with an obd2 scan tool that would be capable of monitoring the voltage? i certainly would not pay the dealership if they are going to follow that plan you listed above just from a cost stand point but id hate the idea of throwing money at part in hopes of fixing it as well.
is there any way you can find someone local with an obd2 scan tool that would be capable of monitoring the voltage? i certainly would not pay the dealership if they are going to follow that plan you listed above just from a cost stand point but id hate the idea of throwing money at part in hopes of fixing it as well.
Unfortunately, I can't find anyone local with a voltage monitoring OBD scanner. I was told that since the problem is intermittent anyway, a voltage scan may not be sensitive enough to show a problem.
Yeah, I hate to just replace parts to try to fix as well, but since it's only a bit over $100, and mileage is about 80,000 km (50,000 miles), I'll need to replace them soon anyway, so it might be worth a shot before I take it to a dealership.
Originally Posted by Gordgee
I read a couple of posts on forums that refer to problems with the Bosch O2 sensors on Japanese cars (and on Chrysler for some reason). I couldn't find a listing for a Bosch direct fit for the G35, so it would be the listing Bosch has for the G35 Universal fit.
Unfortunately, I can't find anyone local with a voltage monitoring OBD scanner. I was told that since the problem is intermittent anyway, a voltage scan may not be sensitive enough to show a problem.
Yeah, I hate to just replace parts to try to fix as well, but since it's only a bit over $100, and mileage is about 80,000 km (50,000 miles), I'll need to replace them soon anyway, so it might be worth a shot before I take it to a dealership.
Unfortunately, I can't find anyone local with a voltage monitoring OBD scanner. I was told that since the problem is intermittent anyway, a voltage scan may not be sensitive enough to show a problem.
Yeah, I hate to just replace parts to try to fix as well, but since it's only a bit over $100, and mileage is about 80,000 km (50,000 miles), I'll need to replace them soon anyway, so it might be worth a shot before I take it to a dealership.
Gordgee,
The cheapest way to go might be to swap the bank1 and 2 swnsors with each other to see if the problem moves to bank 1.
The O2 sensor can be tough to remove, I'm told you need a special
O2 socket.
The cheapest way to go might be to swap the bank1 and 2 swnsors with each other to see if the problem moves to bank 1.
The O2 sensor can be tough to remove, I'm told you need a special
O2 socket.
Registered User
Joined: Jan 2004
Posts: 9
Likes: 0
The O2 socket wrench does make life easy, however I managed to get mine loose without one. It took some creative thinking and a few busted knuckles. Then I tried the socket on a friend's 350z and it worked much better.
Joined: Jul 2002
Posts: 4,325
Likes: 4
From: Edmonton, Alberta, Canada
Originally Posted by drumma022
The O2 socket wrench does make life easy, however I managed to get mine loose without one. It took some creative thinking and a few busted knuckles. Then I tried the socket on a friend's 350z and it worked much better.
Joined: Jul 2002
Posts: 4,325
Likes: 4
From: Edmonton, Alberta, Canada
Originally Posted by RedondoG
Gordgee,
The cheapest way to go might be to swap the bank1 and 2 swnsors with each other to see if the problem moves to bank 1.
The O2 sensor can be tough to remove, I'm told you need a special
O2 socket.
The cheapest way to go might be to swap the bank1 and 2 swnsors with each other to see if the problem moves to bank 1.
The O2 sensor can be tough to remove, I'm told you need a special
O2 socket.
Thank-you
Hey Gord,
That idea is right on - you will see the code change (end in 3 instead of 4) if the sensor is indeed the issue after the swap.
I also recall reading something in the FSM that indicated that you could use consult to specify which bank the ECU should use to take its reading. Anyway I think your problem may be entirely solved by swapping banks - even if that sensor is bad.
That idea is right on - you will see the code change (end in 3 instead of 4) if the sensor is indeed the issue after the swap.
I also recall reading something in the FSM that indicated that you could use consult to specify which bank the ECU should use to take its reading. Anyway I think your problem may be entirely solved by swapping banks - even if that sensor is bad.
Joined: Jul 2002
Posts: 4,325
Likes: 4
From: Edmonton, Alberta, Canada
Yeah, I'm going to try freeing up some time to do the swap this afternoon. If it's a weak or dying sensor, the code should shift to the otherside. Then I'll just have to put up with the crappy gas mileage until I get a new sensor next week.
I have an off-set 'crow's foot' type of wrench that I hope will work. It looks rather tight and awkward to get at the sensors however.
Did you get at it from the top or underneath the car?
I have an off-set 'crow's foot' type of wrench that I hope will work. It looks rather tight and awkward to get at the sensors however.
Originally Posted by drumma022
The O2 socket wrench does make life easy, however I managed to get mine loose without one.
Registered User
Joined: Dec 2003
Posts: 2,514
Likes: 5
From: Marietta, Georgia
US Bosch and German Bosch are very different companies from BOSCH JAPAN, so don't assume discount store Bosch are the same as oem BOSCH!
BOSCH JAPAN purchased rights to some patents before and just after WWII and continues to develop components separtely from either of these similiar named companies.
BOSCH JAPAN purchased rights to some patents before and just after WWII and continues to develop components separtely from either of these similiar named companies.
Joined: Jul 2002
Posts: 4,325
Likes: 4
From: Edmonton, Alberta, Canada
Originally Posted by RedondoG
I tried from underneath with a crows foot and failed.. good luck!
Now I just have to disconnect the wire connector. I can't see the connector from the top. I hope I don't have to remove much to get at them! Looks like at least the air intake tube, and I'm hoping I don't have to take off the plenum. Anyone know for sure? I'm going to finish the swap after supper.
Joined: Jul 2002
Posts: 4,325
Likes: 4
From: Edmonton, Alberta, Canada
Yes, I found the connector when I got under there. Had some difficulty removing the plug from the bracket. Seems bass-ackward that the plug to the O2 sensor is attached to the bracket, rather than the socket that goes into the wiring of the car.
Finally go the Sensors swapped, so we'll see what happens on the next drive. The Sensor was carboned up a bit, so I'm assuming that that bank was running rich.
Finally go the Sensors swapped, so we'll see what happens on the next drive. The Sensor was carboned up a bit, so I'm assuming that that bank was running rich.
Joined: Jul 2002
Posts: 4,325
Likes: 4
From: Edmonton, Alberta, Canada
Originally Posted by Q45tech
US Bosch and German Bosch are very different companies from BOSCH JAPAN, so don't assume discount store Bosch are the same as oem BOSCH!
BOSCH JAPAN purchased rights to some patents before and just after WWII and continues to develop components separtely from either of these similiar named companies.
BOSCH JAPAN purchased rights to some patents before and just after WWII and continues to develop components separtely from either of these similiar named companies.
If you had to go aftermarket on an O2 sensor for the Infinitis, what would you recommend? NTK? Denso? Other?