I’m a newbie to the forum not the Prius (codes C1239 and C1467)

The only advice I think would be worth while for this time of year is to stay warm. As warm as possible. It's never fun getting under the car in the snow, this time of year. And even in a heated garage with knuckle breakin frozen nuts and bolts.
Make sure you've got a couple cans of WD or PB Blaster and brake cleaner before hand. It's never fun when those cans get empty before the job is done.

 

In my experience of replacing Prius hubs where road salt is used, it wasn't the nuts/bolts that were knuckle busters. They came right off. Then the completely unbolted hub just stayed put anyway like it was welded. I used a slide hammer till my arm wire out before it came loose. I'll bring an air hammer to the next fight.

I've heard of tricks like putting the wheel/tire back on the unbolted hub and letting the jack down, but that'd be a little outside my comfort zone.

 

Here is a page or two from the Toyota repair manual for the CH-V model with a C1467 code.
Toyota CH-R Service Manual - Open in Front Speed Sensor RH (C1330-C1467) - Vehicle Stability Control System

If it helps you might want to look into getting a 2 day subcription to the Full Toyota Repair manual for your year and model Prius C. There are a lot of instructions and repair procedures that can save you from mis diagnosing what the real issue(s) are with the car and possibly save you from replacing parts that might not be needed.
The 2 day STANDARD subscription costs $25 and you can find it

https://techinfo.toyota.com

I'll look up the C1239 next and see if that shows me anything interesting too.

 

Here is a link to an example that shows one of the many possible INF codes that a Diagnostic Trouble Codes ( dtc ) can have and can be extremely helpful when the scan tool being used can add them for you.
It looks like your DTC C1239 has at least one INF code (possibly more too).
In this link the DTC and INF are
C1239/39
Keep in mind that this link is just an example and not necessarily specific to your model and year.
It might also give you an idea or two about how to search for issues with your car when they show up
C1239/39 - Toyota Diagnostic Trouble Code (DTC) Definition, Causes and Diagnosis

I used the search terms toyota dtc ( error code here ) to find the links I've posted about the error codes above.

On another note, besides google I also use duckduckgo dot com - the non tracking search engine which often shows different results

And a link to a priuschat thread about ODB2 scantools for Gen 2 and 3 Prius
Gen2 OBD2 app review | Page 2 | PriusChat

we're always searching for a more comprehensive list of tools that work well with our hybrids.

 

I had the same problem with a tiny set of trim pieces on the hatch. both sides. It was so cold outside I decided to wait till it warmed up. That plastic stuff is brittle enough when it's warm.
You can try a heat gun or anything that will warm it up enough, being careful and patient not to melt it.

You should see the way the panel between the Gen 4 hatch glass and the upper brake light bar (toyota calls that panel a spoiler) is attached to the carbon fiber hatch with those white slide in pins. There ain't no way I could see how to get it off without breaking a couple of those pin holders on the spoiler. Because the pins slide into the holders in 3 different directions and there are like 10 pins on that 6 inch wide panet that runs the from one side of the hatch to the other. Than there were those two tiny thin brittle ones that had to come off too.

Hope you figure out how to get them off.