If your speedo is dropping below 0, then you do probably have that issue with the stepper motor, or maybe a small piece broke off to stop the needle at the right spot

 

well back to my original question/problem. disconnected the battery, and it got rid of my low tire pressure warning. YAY! lol.....ill look into the stepper motor issue. as ive seen a few threads about that as well. thanks guys

 

Glad it worked!