[Bullnettles]

Had the coilpack on cylinder #1 replaced (and added heat tape) and 2 days later I heard knocking that went away as fast as it came. I had nowhere to pull off and it stopped, so I went another 1/4 mile and it came back w/an oil pressure light. Killed it and cleared it from the freeway (now off the entrance ramp so I had a shoulder). I know of the camshaft TSB, but this threw no codes until it happened, and I never checked them. I just got word of the following codes:
U0073 - Lack of communication between modules?
C1241 - Low voltage
C1201 - Brake control system turns off (explains why the TCS light blinked on the first time it started knocking)

Buddy thinks it may just have issues telling the injectors to fire (this did happen right about when the EFI would turn off, if I'm not mistaken (10 minutes after starting or so).

Thoughts?