15 Throttle potentiometer error
 

1991 964 C2 Targa.

using the Durometrics software tool, I get this error form my car.

the idle is rough, and choppy. and happens more so when the engine is hot.

background info. just took engine out and did top end rebuild, both oil galleys were packed up full of gunk.

when the engine went back in, this error code popped up

looking at Adrian Streather's 964 book I see a code list for the Bosch hammer with a code of 1115 Idle speed contact break

is this the same thing?
what do I have to do to get the code to go away?

Brad