Ah, that makes sense. That's for earlier versions of the 850 with a different ECU than our cars have. That's actually a good thing to know.
Your car and mine both have a Bosch Motronic 4.4 ECU, which is not covered there. In these (and I believe the 4.3 which all 850 Turbo versions used), the MAP sensor is the one you already know of
If you reset the code, how long does it take to come back?
One thing you could try if cleaning the connector doesn't work is to try a hard-reset of the computer. I solved one issue I had with my car that way. Pull off the negative battery cable, go press on the brake pedal for a few seconds to drain the charge, and then reconnect it. Make sure you've got your radio code!
This will essentially erase the computer's memory, and it will re-learn what to expect from the sensors and everything else. You'll have weird idling for the first few drives, but it will figure it out after 2-3 days.