Cadillac Repair: 94 Cadillac O2 Sensor, cadillac fleetwood, oxygen sensors

Question
how many oxygen sensors does a 94 Cadillac Fleetwood have?  What else would cause the car to lose power and then run fine for a while and then lose power again?

Answer
Perform this task on your climate control panel.

1. Ignition ON, Engine OFF.

2. simultaneously push and hold the OFF and WARMER buttons until the whole display lights up and release the buttons.

3. Writ down all the LETTER/NUMBER combinations that appear EXACTLY in the order they appear until you see PCM?.

4. Turn OFF ignition.

Tell me what the LETTER/NUMBER combinations are.