Car Sputtered on start, sputter, idle, engine light?

[0Bosxter0]

So the CEL light is back on now...

OK..
Checked the CEL code and got this...

P0650 Check Engine Malfunction Indicator Light (MIL) – Open Circuit
Fault area
– Break in wiring
– Short to ground
– Short to B+ (+12 volts)

I'm not quite sure how the CEL light works. Does it activate when there is a problem then turn off when the problem is remedied, or does it stay on once activated and stay on until reset by a service shop?

I think it has to be one of two things, either the new gauge pod is somehow setting it off, or maybe there is a wiring mix-up with the new head unit I installed.
In regards to the gauge pod, the light behind the digital MPH readout had burned out, I simplly replaced it with one from the original pod. I cant imagine that would set off a CEL??
In regards to the head unit, I ordered a wire harness from Crutchfield. I read on their website that the orange and red wire needed to be switched for the Boxster, I also confirmed this with a Crutchfield representative on the telephone. The instructions that came with the wire harness had a list of vehicles that required this red/orange switch however the Boxster was not one of them...??? Could this cause this P0650 error?

Respectfully,
Ben