I had something very similar within the last 2 weeks
Running fine, press the accelerator and check engine comes one and engine dies.
Codes were
P2003 Malfunction of Secondary Air
P2051 misfiring of cylinder 1
P2053 misfiring of cylinder 3
P2055 misfiring of cylinder 2
At first I thought it was bad gas. It started slowly, allowed me to drive a fair distance then shut down. The distances got shorter and shorter.
Prior to this problem I had been driving with a rather heavy foot and I had noticed a slight change to the tone of the exhaust.
Diagnoses, upper cat failed and plugged the rear. No way to exhaust the spent gas that forces the engine to shutdown.

It was only one side. I was in California and I had to have thebone side replaced. Just ordered the cat free pipes from Needswings. They are less expensive than replacing the cats.

Get someone to read the codes for you. Misfire on one bank or the other may imply cats. Took it off and it was plugged