For a FWD 1993 Cadillac Deville there is no F85 BCM trouble code. There is however an E85 ECM trouble code. ECM codes always have a prefix of E. BCM codes always have a prefix of F. E85 - Throttle body service required (throttle valve not closing).
No you can not
location of fusible link 93 cad deville
EGR valve fault.
DTC - 93 Transmission pressure control solenoid circuit error
spark plug replacement on a 93 Cadillac DeVille 4.9 liter
there is a connector under the dash on the passenger side
there are no cabin filters in a 93 Cadillac deville
Driving conservatively and on the lower end of gears
48 + 45 = 93
A 93 Deville that wont shift from second gear has most likely got an internal transmission problem. Unless the linkage is mis-adjusted, then the problem is onside of the transmission.
No such thing!