This is my first post and I'm trying to help a family friend out with their 2014 Pathfinder.
They were told the cat needs to be replaced with a P0420 code, but I wanted to see the live data myself before they commit.
I drove it and it feels fine, no odors from the tailpipe that would suggest any type of unburned fuel.
The Torque Pro data I have might suggest a lazy downstream sensor on bank 1, but TBH, my experience with other O2 sensors usually see a much flatter line when the cat is lit off.
Anyway, the bank 2 sensor 2 data depicts a more healthy sensor than bank 1, but I don't know Nissan sensors enough to say if the downstream sensors are usually flat or slightly sawtoothed.
This is at a 30 MPH cruise
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Based on this, my guy says to replace both downstream sensors before the cat, or at least swap bank 1 and 2 sensors to see if the change follows.
Sensors are original with 120K miles.
How difficult is it to access the downstream sensors without using a lift? I would use jack stands, so hoping they aren't tucked away too deep.
Any input appreciated.
They were told the cat needs to be replaced with a P0420 code, but I wanted to see the live data myself before they commit.
I drove it and it feels fine, no odors from the tailpipe that would suggest any type of unburned fuel.
The Torque Pro data I have might suggest a lazy downstream sensor on bank 1, but TBH, my experience with other O2 sensors usually see a much flatter line when the cat is lit off.
Anyway, the bank 2 sensor 2 data depicts a more healthy sensor than bank 1, but I don't know Nissan sensors enough to say if the downstream sensors are usually flat or slightly sawtoothed.
This is at a 30 MPH cruise
Based on this, my guy says to replace both downstream sensors before the cat, or at least swap bank 1 and 2 sensors to see if the change follows.
Sensors are original with 120K miles.
How difficult is it to access the downstream sensors without using a lift? I would use jack stands, so hoping they aren't tucked away too deep.
Any input appreciated.
