93 Cadillac 3 codes E48 E75 and E98 How to fix?

Question edited for clarity, spelling of the maker, toss in some CAPS and make sentences.
Question moved to model category.

Both are Transmission errors

E-39 Error

https://caddyinfo.ipbhost.com/topic/10886-92-deville-error-code-e39/

and E-98

Diagnostic Code -- E98 Need Help

Cadillac Owners Forum https://www.cadillacforums.com > threads > diagnostic...
Nov 9, 2005 - E98 - High RPM P/N to D/R in ISC Range check your tranny. its sometimes called a VCC overstress error. dont change gears until car is totally ...

Great, now I have MORE trouble codes!! E91 and E98
Aug 7, 2006
Error codes E22, E32 E52 E98 - Cadillac Owners Forum
May 5, 2004
More results from www.cadillacforums.com

EGR Valve issue (Exhaust Gas Recirculation)

https://www.google.com/search?q=1992+Cadillac+DeVille+Sedan.+error+code+E48

..

E27 Open Throttle Switch Signal here is a list of all codes E12 No Distributor Reference Signal E13 Oxygen Sensor Not Ready E14 Shorted Coolant Sensor E15 Open Coolant Sensor E16 Generator Voltage Out of Range E19 Shorted Fuel Pump Circuit E20 Open Fuel Pump Circuit E21 Shorted Throttle Position Sensor E22 Open Throttle Position Sensor E23 EST Signal Problem E24 Speed Sensor Circuit Problem E26 Shorted Throttle Switch Circuit E27 Open Throttle Switch Signal E30 ISC RPM Out Of Range E31 Shorted MAP Sensor Signal E32 Open MAP Sensor Signal E34 MAP Sensor Signal Out Of Range E37 Shorted MAT Sensor Signal E38 Open MAT Sensor Signal E39 VCC Engagement Problem E40 Power Steering Pressure Switch Signal E41 Cam Sensor Signal Problem E44 Oxygen Sensor Signal Lean E45 Oxygen Sensor Signal Rich E47 BCM to PCM/ECM Data Problem E48 EGR System Problem E52 PCM/ECM Memory Reset E53 Distributor Signal Interrupt E55 Closed Throttle Angle Out of Range E58 Pass Key Control Problem E60 Cruise - Not In Drive E61 Cruise - Vent Solenoid Problem E62 Cruise - Vacuum Solenoid Problem E63 Cruise - Set Speed vs Vehicle Speed E64 Cruise - Acceleration Too High E65 Cruise - Servo Position Signal Problem E66 Cruise - Engine RPM Too High E67 Cruise - Switch Shorted E68 Cruise - Command Problem E70 Intermittent TPS E71 Intermittent MAP E73 Intermittent Coolant Sensor E74 Intermittent MAT Sensor Signal E75 Intermittent VSS Signal E80 Fuel System Rich E85 Idle Throttle Angle Too High E90 Cruise - VCC Brake Switch Signal Problem E91 Cruise - PRNDL Switch Problem E92 Heated Windshield Request Problem E96 Torque Converter Overstress E97 P/N To D/R Engagement Problem E98 P/N To D/R ISC Engaged Problem E99 Cruise - Servo Apply Problem

Use Google & type--
1992 Cadillac OBD1 Codes
Lots of info their on your cars system & gm codes
OBD1 Codes E48,F11,F30 type that in search engine
google,bing etc

Probably two different issues.

The code is saying the computer sees the engine RPM is too high when shifting between park neutral and drive.
The rough idle would be something else.

Below os a description of what code e48 is and basically has to do with the EGR system and your computer doing tests and the tests failing. As far as the other codes I'm not certain to be honest with you. I do know by holding the "OFF" & "LOW" buttons at the same time clears the codes in the BCM and a 7.0 should appear at the end. The .0.7 and the .8.8.8 I am sorry but didn't have any luck with that and really haven't heard of. Wish I could be more help but here is the description on the e48 for you. Hope this helps.

e52 is ecm memory reset
e91 park neutral safety switch
e98 transaxle shift fault

The E98 is P/N to D/R In ISC (Idel Speed Control) Range problem. This code will not trigger a service light.
The F47 is Refrigerent System Problem. This code turns on the Service Air Cond light, and switched the Climate Control from Auto to Economy.

Sounds like the engine is idling to high. There is a procedure that you must go through to set it. Reply and I will let you know how to set it.

Code 22 OPEN TPS SENSOR CIRCUIT , E 70 INTERMITTANT TPS SIGNAL, E98 DRIVER CAUSED PARK / N TO DRIVE motion by the driver, attempting a shift position, not agreeable with computer. Go figure ! Hope this helps