C13 Intake Valve Actuator issue - Ever ran into this?

I have an 05 International with a 650k mile CAT C13 engine. The truck pulls an empty trailer like it's fully loaded. No power at all. So, I took it to a fella that can read the fault codes. Mine is showing 285-5 thru 290-5 and a 385-4. Yes, all 6 actuators are throwing the same code "Intake Valve Actuator #_ current low (92)".

Now, what in the wide wide world of sports could be causing all 6 to code out? I've been told I need an overhead. I've been told it's a short. I've been told it's the ECM gone bad. Shoot, I've been told that Elvis is still alive. Anyone have thoughts on this?

 

Thank you Cat sdp and wore out. I will check the ground as soon as possible. Based on your replies, I have a couple questions.

Any idea of a rough guesstimate on what a harness would cost?

How big of a pain in the butt is it to replace the entire harness?

I was planning on having an overhead done soon. But, in light of this issue (ECM has me derated by 30%. So 300 horsepower won't cut it), I guess I'll have the overhead and harness (if no ground issue) replaced at the same time to reduce costs. Just trying to get a feel for how thin my wallet is gonna be.

 

Well, I took the truck to CAT this morning. Seems the wiring harness is just fine. I had a bad feeling that it couldn't be that easy. Nope, the problem is that the ECM is toast. Gonna be $2500 to $3000 to replace.

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