needle stays @ 900 rpm even when engine is off

[gbenz]

Hi guys my gauge stays at 900 rpm and mpg points between end and 40mpg even when engine off and keys out of the ignition. Sometimes it stays at normal where it suppose to be. This only happens to this particular gauge. Gas and temp gauge is ok.
Thanks in advance.

[dogsbark26]

Looks like it is broken.

Are you trying to fix it or replace it?