No, with the sender I'd guess. Here is how one works.
So if one of the resistance wires breaks near the low pressure, low resistance end of things, it will act like a break in the wiring.
To check, put an ohmmeter on the gauge (with wires disconnected) and rev your engine. You should see a smooth change in resistance from very little to some kind of peak.
You can check your gauge by grounding the sensor input. If it still pegs, then perhaps the gauge has a faulty ground.
Or maybe (my last choice) the gauge is broken internally.
Walt Fricke