Can AIP failure lead to catalytic converter failure

My 2011 Toyota Tundra recently experienced a check engine light followed by a 4 lo flashing and Traction control. Brought it to dealership and they replaced my AIP under the extended service contract for well known failure of air injection pump. They stated that the check engine light alarm possibly represented a catalytic converter failure or bad O2 sensor. They cleared the alarm stating perhaps it was just a "burp"in the system. It drove beautifully for about 24 hours and now seemingly has lost a little horsepower and the check engine light came back on a day later. My question is if the AIP is responsible for delivering air into the exhaust system could failure of this part cause early catalytic converter failure or O2 sensor. They said it could be the fact I have an after market exhaust (Toyota exhaust placed by Toyota dealer at time of purchase new by previous owner). Any help in understanding how to approach this problem would be appreciated. To me kind of weird it all happened at once.

 

No. Your statement of recirculating system is correct, but nothing really to do with the cats, they're just cats and they do the f they want pretty much... your loss in power may be due to the SAIP going back out. As o2s dying dont trigger loss of power like the AIP system does...

 

Going to assume that you mean the CEL for air pumps will trigger “limp mode” sometimes resulting in power loss? ... that lack of operational air pumps will not reduce power.

 

Yes.

 

Now dealership is telling me could be my oxygen sensors or my catalytic converter. They say they can't tell which is which and would start with O2 sensors. I find it odd by AIP and O2 sensor/cat all went bad at once.....could there be a single common explanation? I am not mech inclined. Any help or advice would be appreciated.