Temp and Fuel Gauges

Both Gauges on my Geo Prizm, Temperature and Fuel, read pegged at all times. When the ignition switch is turned on the Fuel Gauges rises to Full and the Temperature Gauge Reads Full HOT. Anyone have any ideas?

Try posting your question the Toyota Corolla forum. The Corolla is the Prizm's Japanese counterpart, and they will be more equipped to help you out.