Bad skid traction ECU--safe?

Okay, the title tells the story right there.

2008 Prius with roughly 180,000 miles on it. I had my new 12V battery die last week and I got the red triangle and the oil light. I topped up the oil, had the battery charged, and took it to the dealer to interpret the triangular warning light.

They just told me the code shows I need to replace the skid traction ECU. The price they're quoting me is $2900 for the part and labor ($2300 for the ECU alone).

I just put a couple of thousand into it last summer and I'm not interested in putting another three k into it now. Not indulging in the sunk cost fallacy this time.

My question is this: is it safe to keep driving it in this condition? I assume it won't pass inspection when that comes due, although that's not until August or September, so should it be okay to keep driving it until then?

TIA

 

Okay, thanks, guys.

I just picked the car up. The code was C-1300 and no other codes were noted on the dash.

No other lights (except the oil pressure light) and the check engine light is not on.

I just drove it home and I didn't notice anything unusual.

At this point, unless there is something that can be done without too much expense, my plan is probably to keep going as long as I can, which is probably until I'm due for inspection, and then replace it. However, I'm all ears for any suggestions.

Thanks.