Dash indicator lights turned off but DTC blink codes still present

Hi all, i'm a new poster here. I'm working on a 2013 Prius C. The other day, after driving for a few hours in snowy and slushy conditions, all four brake system indicator lights lit up on the dash [BRAKE, ABS, the skiddy one (VSC), and ((!))].

I used the trick from this excellent post to get the blink codes. There were six of them across three of those four indicator lights.

They were:
ABS 31, 32, 33 -- Issues with the speed sensor circuit for the front-right, front-left, and rear-right speed sensors
ABS 41 -- Low battery positive voltage
EBC ((!)) 49 -- Open in stop light switch circuit
VSC (skid) 64 -- Stop light control relay malfunction

I haven't noticed any changes in performance, perhaps a bit of extra play in the brake pedal or having to push a bit more firmly than usual, but not as much as on a car without power braking.

Based on these codes (and lots of message boards and youtube videos XD), i came up with a whole diagnostic plan. The first step was to check the 12V auxiliary battery. I checked it thru the diagnostic tool on the AV display and it seemed kinda low (14.2V while driving, 11.8V when no systems were on, 11.5V with systems like headlights and air conditioning on). So i tested it with a multimeter and it seemed a bit low but passable (12.5V with car turned off, 12.37V with no systems on, 12.2V with headlights and AC on). Which was a bummer because i was really hoping it was as simple as changing the battery.

Disheartened, i packed up the multimeter and got in the car for the short drive home. A few minutes into the drive, all four of the brake-system indicator lights flicked off. Bizarre. When i got home, i checked the blink codes again. All six of the above listed codes are still blinking out. Which leads me to two questions:

1. Are blink codes only current codes or do they also display past codes that are no longer active? At this point, now that the lights have turned themselves off, should i clear the codes?

2. Any thoughts on if there is still likely to be an issue in the brake system now that the lights have turned themselves off?

Thank you!!!

 

Thanks @Leadfoot J. McCoalroller . So to confirm, the blink codes include all stale codes if they are not cleared?

Would it be reasonable to clear all codes now just to see which ones come back (and, thus, are still being triggered or considered active)?

 

haha @ChapmanF, thanks for weighing in. i'm also not sure and haven't been able to get access to the repair manual for this car. If anyone has access to a 2013 Pirus C repair manual that they'd be able to point me towards, that would make this much, much easier XD