2006 100 Grenaded Cat?

[100s]

245,000 on the clock. Maintained by LC specialist, dealer, & myself (LC fanatic)

P0430 on the scanner.

Batt light came on, had this happen with a failing batt before so fully charged overnight. Rig was driven about 5 miles Batt light still on. Suspected Alternator so went ahead and started preparing for this. Forgot to mention to the primary driver that the rig should not be driven any long distance. Rig was driven too far, and the battery was depeted. I tried to get to the location where the rig was to swap battery but miscommunication resulted in the rig heading home. the last 1/10 mile before the house I was told that the rig struggled and surged climbing a hill, and then there was a loud POP sort of like a backfire.

After alternator swap she started throwing the code. I am praying that the bank2 sensor just got a good blast of contaminant but I'm also worried that with climbing the hill the fuel system dumped fuel and it may have grenaded in the cat.

Will check air filter, MAF, PCV, etc. Planning on purchasing a Bank2 O2 sensor.

Any thoughts with this specific scenario?

 

[100s]

Replaced bank 2 rear 02 Sensor - no change. Cleaned MAF, No change. Noticed that one of the air control valve lines for the PS pump wasn't connected from the Alternator swap. I am assuming that maybe my LC guy swapped the alt from the top. What I noticed watching Bank 2 O2 2 voltage was that 9/10 if I moved the steering, or hit the brakes that I got a big dip in voltage. If she was sitting in the driveway it stayed nearly consistant at about .7xx . You can see that in the chart with the long flat line. I also turned her off and back on twice (only off for 30 seconds) and the codes didn't return, I assume these come back with a longer off cycle to trip the "two trip" for the P0430 trigger? These huge drops in voltage on the O2 sensor are they normal?

Given that braking and power steering kicking on, cause a voltage drop, could this be a vac or air leak somewhere?

These types of voltage readings bother me.

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0.036​