It won't let me format the numbers into the columns where they make sense.

Glow plug numbers are
0.1, 9.4, 0.3, 0.2
0.2, 0.3, 0.3, 46.4

I to C numbers are within limits

Any suggestions would be appreciated--both on the truck and how to properly post on a particular thread!!

This was my problem when I had similar symptoms. Not saying that it’s your problem.
ICP sensor

I bought one from Amazon for a good price. I don’t put a lot of miles on the truck, but I replaced it in December , 2016

Also check you’re valve cover wiring connector.

That's great info on the ICP sensor.
My SES light is the one that's on--not the CEL--and I haven't tried to re-set it to see if it comes back on.
While checking my nine pin connections for the injectors and glow plugs, I noticed the wire insulation near the connections has started to fail. I'm wondering if that could cause the light to come on and maybe even cause the shuttering (which it hasn't done in two days). I'd like to be able to wait for warmer days to pull valve covers, replace the through-the-valve-cover connectors, and maybe replace glow plugs.

You get more responses if starting your own thread. Many folks (me at least) overlook resurrected threads since it’s usually done by accident (that great “related threads” feature on FTE 🙄 ).

Be careful buying parts on Amazon/eBay and such. There are very convincing “Motorcraft” fakes out there. We generally recommend only purchasing from well respected trustworthy vendors. CNC Fab, Riffraff, Ford dealer

In regard to your question. I would recommend pulling the code to see what it’s not happy about. FORScan and a Bluetooth dongle will get you there pretty cheap. There are multiple sections on FORScan in the Tech Folder (sticky at the top of our forum) and this thread as a FORScan class.
https://www.ford-trucks.com/forums/1...d-q-and-a.html

Thanks, Terran & Jason.
I have a great NAPA here in Taos that treats me well and they had an ICP sensor with a new pigtail--IN STOCK--so I got it, installed it after work, and my wife and I took it for a successful test drive, returning with a pint of ice cream. It doesn't get much better!!

I ordered new nine-pin connectors as well and will replace those later.