I would look at the sensor data and verify that you really do have a problem first. Does this car have to pass Some sort of inspection to be able to drive? If so then you will have to fix it. Engines that burn oil will kill cat converters. Just an fyi.

My Aunt doesn't have to get her Vue inspected until February of next year; and yes, we have the sniffer test in Jersey.

Yeah, I have had my share of oil burning engines; also engines with a lot of blow-by (clogged pcv systems). The Vue doesn't seem to be burning oil; or at least I don't see it in the exhaust (no blue smoke; or any smoke at all). After the air/oil separator install, her intake remains clean and there is very little oil accumulated in the catch can. I guess I will have to get familiar with engine sensor data; which I have to do anyways for my other project. I will get a good look next time she's over. Hopefully I can figure it out before winter sets in; at which point, I get very little done.

Also, her car has 160k on the odometer. I don't know how long the OEM cats last on these cars. I've only had 1 cat clog on me; and that was on a car with 250k on it.

Try plotting the data for the suspect bank 2 on your scanner, one below the other so that you can see if any changes in the post cat O2 sensor (bank 2 Sensor 1 (front) and bank 2 Sensor 2 ( post cat)..

Then do the same with bank 1. The readings for bank 1 should be representative of normal unless things are marginal. But it should give you a base for comparison.

It's very difficult to interpret O2 sensor V readings as a string of numbers. Plotting the data in real time helps quite a bit

If it's clogged just hold it at 5-6k and it'll blow the cats out the tail pipe. Easy fix 😂

^^^^^^^^^^I should do what the kids do nowadays and install a 2-step. That should make the cats flow better after a few revs^^^^^^^^^^^

Okay; I got a little time on Sunday to look at her Vue. Here is the data as follows

O2 Sensor B1S1 O2 Sensor B1S2
Max 0.6004 (V) MAX 1000 (cnts)
MEAS 0.6004 (V) MEAS 152 (cnts)
MIN 0.6004 (V) MIN 0 (cnts)
STS: OK STS: OK

Okay, I tried to separate the data, but it seems I can't do that Let me know if this works or not; I will post accordingly

O2 Sensor B2S1 O2 Sensor B2S2
MAX 0.6004 MAX 1000 (cnts)
MEAS 0.6004 MEAS 152 (cnts)
MIN 0.6004 (V) MIN 0 (cnts)
STS: OK STS: OK

Catalyst B1 Catalyst B2
MAX 0.999 MAX 0.999
MEAS 0.896 MEAS 0.003
MIN 0.350 MIN 0.500
STS: OK STS: LOW

I am only posting the results of the HO2 Sensor B1S1 results, as the other HO2 sensors (B1S2, B2S1, and B2S2) had the same results

HO2 Sen B1S1
MAX 8 (cnts)
MEAS 0 (cnts)
MIN 0 (cnts)
STS: OK