A new revelation- engine knock?

[TM]

Listers,
I may be an idiot for not realizing this earlier, but can
engine knock cause the orange light that looks like an engine
with a little lightning bolt on top of it to turn on?

I thought I was having an intermittent charging problem that
only reared its head when I was going up long gradual uphills,
but now that I think about it, it may be a check engine light
coming on due to knock. I will have to consult the owner's
manual again to make sure.

What would some of the possible culprits? I'm using 93 octane
gas at a fairly low elevation, stock boost levels. The engine
runs very well otherwise.

Taka