How do you fix a speedometer in a 1992 Honda Prelude which is not working properly its always stuck at 40 kph What could be wrong?

If your 1992 Honda Prelude's speedometer is stuck at 40 kph, the issue could be a faulty speed sensor, a broken speedometer cable, or a malfunctioning gauge. Begin by checking the speedometer cable for any damage or disconnection; replacing it may solve the problem. If the cable seems fine, inspect the speed sensor, which may need replacement if it's not sending accurate signals to the gauge. Finally, if both components are functional, the speedometer itself may need repair or calibration.