temp guage sensor is like.. it sits sort've infront of the gearbox towards the front of the vehicle its a big plastic thing, with wires coming out of both endes its bit of a circle, if you've ever rattled the motor (clutch to fast etc) maybe fkd it up.

Probly fell out just rolling around hitting something thats heating up? or i dno sum shit lyk dat.

its like a CYLINDER shape. try find it. i dont have pics.

Then just cable tie it somewhere high up. away from anything.

Fuel guage, is a sensor issue. happen to me with the speedo..