Injector Control Cicuit

I recently put a new head gasket on my 1996 Buick Century.
Everything was running fine for awhile when check engine light came on, and two codes were there.

P0301 Cyl 1 misfire
and
P1200 Injector control circuit.

Can anyone tell me what the "injector control circuit" is?
I have tested the spark on all six cylinders, and I have that.

Thanks
Greg

not knowing exactly what it is, i would guess it would be the control for your fuel injectors. other than than, your guess is as good as mine. for the misfire, you might want to check timing and check if the plug wires are in the correct spots. both the injection control circuit and the misfire would contribute to eachother, if you are missing fuel in a cylinder or in a revolution, it can be called a misfire.

not knowing exactly what it is, i would guess it would be the control for your fuel injectors. other than than, your guess is as good as mine. for the misfire, you might want to check timing and check if the plug wires are in the correct spots. both the injection control circuit and the misfire would contribute to eachother, if you are missing fuel in a cylinder or in a revolution, it can be called a misfire.

I found out that it was a loose injector electrical plug. I must have bumped it when I did the head gasket. I'm lucky it was one of the two I could reach without taking everything back apart! Just pushed it back on with a screw driver, and it wen "CLICK". The check engine light disapeared after a few starts and stops.
Thanks for replying though!
Greg