Power Steering Light On problems of the 2012 Honda FIT

Our well-maintained Honda Fit has developed an issue where the eps steering light comes on sporadically during driving. In each of these events, the steering assist sometimes cuts out for a second or two causing me to have to manually control the steering. In all event instances, cabin power is affected: power to radio will restart, and sometimes dashboard lights go as well. In more severe instances dashboard lights and seatbelt lights cutout momentarily and a steering dtc shines quickly in the dummy light cluster. Environment: eps steering issues happen at all manner of speeds and manuevers - regular backroad driving, parking lots and even sitting idle. Car hardly has been driven the past few years (under 7500/year) and has never hit anything, been bumped (or if it did, we didn't know about it) nor been in an accident of any kind. We are in a salt-belt state. Problem started occurring late December 2020, during regular cold weather (30-45 degrees consistently); it is not garaged.

Electronic power steering light turned on intermittently. This caused the steering wheel to lock up or be really hard to steer. This typically happens at lower speed or when idle. This can occur mid steer at times as well.

I having intermittent loss of power steering. So far it has happened mostly with low speed turns. I will have to use more effort to complete the turn when this happens. I had the power steering light come on while driving straight ahead once for a few seconds. 60,000 miles on car so far with no problems in the past and no accidents.