Speedometer and total milage help!
 

I have a 1990 maxima. When I'm in park or even in drive mode while breaking, the speedometer never goes down to 0 at a complete stop. It always go back and forthbetween 9 mph - 15 mph. The milage also goes up on it's own even when not driving. Its as if it thinks the car is still moving when I'm only idling or at a complete stop. I'm not sure what's wrong, I don't want the milage to go up when I'm not even driving. It's gonna make re-selling harder. I already have 190k milage on it. Has anyone had the same problem and was able to fix this? Can anyone help me? Any help is appreciated thanks.

RE: Speedometer and total milage help!
 

Take it out, clean connectors. Theres a short circuit causing current leak to the gauge wirings (between sender unit at tranny/instrument panel). Clic on link below, read through

RE: Speedometer and total milage help!
 

it sounds like your speed sensor is bad.