2003-2009 Nissan 350Z

p1084 revup B2 Exh cam sensor. access?

Old 06-06-2019, 06:23 AM
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Default p1084 revup B2 Exh cam sensor. access?

The car has pulled a P1084 on me.
I ordered a new nissan sensor due to the horror stories about aftermarket ones.
I also ordered a crank sensor incase. because the flow chart has that as the last step.

taking a quick search on here i get alot of old info and some that may not apply to the revup engine and its different sensors.

From what i can tell my issue is the bank 2 ( drivers side) exhaust sensor. which is the furthest out on the head.
bolted to the block with a 10mmT/B . and has a pushlock style connector.
Also it should be the "straight" style sensor.

I have cleared the codes. checked the oil . and code came right back.
I would like to proceed with a sensor replacement.
Looking around under the hood it looks like a bugger to get to this outboard revup sensor.

Anyone have any advice or has done this before? Easier to get from underneath? or go in from the top.
do i need to remove the TB or the plenum to access?
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Old 06-06-2019, 10:15 AM
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would recommend removing the intake manifold for the drivers side, it is a little more work but will help you ensure you don't break the pigtail removing it. The pushlock is cumbersome to get to. Take your time and should go smoothly.
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Old 06-08-2019, 04:11 PM
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good news.
got under the hood today and you can lay a blanket on the passenger side of the car.
lean in from the passenger side and go straight back to the sensor.

I had ZERO luck unplugging the sensor while installed.
So i unbolted the sensor. and removed it. and pulled it my way some.
This allowed both hands on the sensor and connector and it popped off cleanly.

I was able to get a standard 3/8 ratchet back there with a deepwell 10mm right on the bolt and still had good access to work the ratchet.

the Oring on my old sensor was flat and dry. I am sure it would have leaked very soon.

I bolted in the new sensor and reset the ECU with the pedal.
A quick joy ride with the car finally out of limp mode ensued.
No check engine light returned.

A block from the house i checked oil pressure gauge at a stop light and noticed it was stuck at 60+ at idle. and instanly went over 120 with any RPM searching here shows its 99% chance of being my oil sending unit.

I plan to hit the local yard and grab a used OEM one from some other nissan 3.5 as they all seem to be the same.
I search the aftermarket and they are all from china and have BAD reviews.
the OEM sensor is about 70$.. .
It's always something, but at least my P1084 is RESOLVED.
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