Bank 1 and Bank 2 issue

Maintenance/Repairs
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1

Hello,
Can anyone take a look at the live readings below for my Bank 1 and Bank 2 O2 sensors and tell me what I’m to look for? Is the voltage going jump around like this? You can see that Bank 1 sensor 2 is very stable, the other are all over the place. I now have a P0430 code Catalyst efficiency below threshold Bank 2. I’ve replaced all the o2 sensors (4) about 6 months ago. The vehicle is a 2009 Volkswagen routan, which if you did not know has the Chrysler 4.0 engine similar to the caravan, and town and country. Thank you

Tim D.

Screenshot 2022-01-02 205022
Screenshot 2022-01-02 2050221875×768 42.2 KB

2

The voltage for the O2 sensor(s) before the cat are going to bounce.

The voltage for the O2 sensor after the cat is going to hold pretty steady,

Tester

3

Thank you, so it appears possibly my Bank 2 Cat is bad since by downstream voltages are bouncing /matching my upstream.

4

I don’t see a bank 2, O2 sensor 2 reading?

Tester

5

Column G on the screen shot

6

It;s starting to switch with upstream.

The converter is bad.

Tester