Help with diagnosing problem, codes..

ALL GOOD NOW ...see my update at the bottom of the thread

Have a CEL and here's the codes, done with a Equus 3100 reader

P1174 Fuel Trim adaptation additive Bank 1 malfunction
P1175 Fuel Trim adaptation additive Bank 2 malfunction
P1186 O2 sensor heater control circuit (Bank 1 Sensor 2)
P1187 O2 sensor heater control circuit (bank 2 Sensor 2)
P0156 O2 circuit (Bank 2, Sensor 2)
P0340 Camshaft position sensor A circuit (Bank 1 or single sensor)

Here's the symptoms....

1st: rough idle on startup, revs to 1200 rpm and drops to 300rpm, car almost stalls but recovers...rough idlle for a minute or so. Unplugging the MAF before startup it idles fine.

2nd: bad gas mileage, 13-14mpg in the city...can smell it running rich out the exhaust.

Am I correct in assuming that my rough startup issues are due to a bad Camshaft position sensor and that the high fuel consumption and rich condition is due to both post - catalyst O2 sensors gone bad?

Anything else I should look for, or am I on the right track? The only thing that bothers me is that the rough idle issues are resolved by unplugging the MAF...just coincidence? Any way to test the CPS sensor voltage/resistance for correct readings?
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