Can EGT probe go bad?

[rammertide07]

I got a set of GlowShift gauges on the pillar. The EGT gauge started give jumpy readings at idle. Then under acceleration, no reading. I contacted GlowShift CS and they told me I could check the gauge by disconnecting the EGT probe wiring. That caused the gauge to max out, then when I grounded it.... it bottomed out. According to GlowShift this means the gauge is working properly. I've double checked the wiring and it is all hooked up.

So I'm thinking its the EGT probe. Can these go bad? I've had it in for about a year. Is there a better replcement probe? The probe wiring just splits off into 2 wires at the end.

Thanks