1994 Toyota Camry OBDII Code P0773

The shift solenoid E is an internal transmission part. Shift solenoids are activated to change gears. When not activated, there is no gear change.
To locate the solenoids, the transmission pan must be removed.
Repair procedure depends on the actual problems.
Is it electrical? Or is the solenoid leaking?
When you remove the transmission Pan, there is a bunch of solenoids( A, B,... E)

Dealer has equipments of diagnosing properly malfunctioning solenoids.

The engine light comes on and when i scan it it says shift solenoid electrical. so it is an electrical problem. gear change are for the most part smooth except for reverse.

The solenoid E should be responsible for the valve that is in fact for the reverse . Dealer has solenoid tester to identify the problem,transmission must be removed/lowered before checking for an open or shorted circuit.
the good news is there won't be no need to rebuild the transmission, it just an electrical problem.

Is there a cabin air filter on a 1994 Toyota Camry XLE V6 and if yes, where is it?

Hello jpp44345

There is no cabin air filter on your 1994 Toyota Camry XLE V6 .
Cabin air filters were introduced back in the mid-1980s in Audis and other European luxury vehicles
. The first domestic applications date back to 1994 (Ford Contour & Mercury
Mystique). Today, cabin air filters are found in almost 80% of all new vehicles
The best way to determine if your vehicle has a cabin air filter is to check your filter supplier's catalog or database, or to look in the vehicle owner's manual. Check the index for Cabin Air Filter, or look in the section that lists scheduled maintenance items.
I checked and could not find cabin air filter on your vehicle.