Are you saying...
"EF" in the right hand LCD
- OR -
"EF" in the left hand LCD when aperture is displayed in the right hand LCD
- OR -
Something else?
Neither of the first two are in the camera documentation and probably indicate a broken camera. That being said, "E" in the left LCD with nothing in the right LCD indicates that the aperture ring is on the "A" setting and Shutter dial at other than "Auto".
Edit: I made the common mistake of confusing the Super A with the Program A. (Being in the U.S., I am more familiar with the Super Program label). As noted in edmundrt's comment below, what you are seeing is the exposure compensation reminder.
You can download a PDF copy of the camera manual from:
Pentax Manuals
(password to view the PDF is "Pentax")
Steve