Check: electric vehicle system warning
Driving back from grocery run yesterday, car suddenly slowed down 41mph with the Check: electric vehicle system warning along with red battery symbol and car alert symbol. Could switch lanes and drive at 41 for a few mins and then it slowed downed further. The P1A961C and P1A9096 codes popped up on the app. Pulled over to the shoulder and had to get the car towed to the dealership. Need to talk to them on Monday to confirm but seems to be the ICCU issue. A review of this reddit forum and general search shows that hyundai hasnt really fixed this issue, atleast not satisfactorily. Ioniq calligraphy with ~12000 miles. No issues or symptoms with the battery/drivetrain leading up to this. Had been in the dealership a couple of times with excessive wind noise on the driver side. We were so happy with the car for the first 8-9 months but this and the dealership experience has dulled that down quite a bit. Will update to confirm post actions.
UPDATE: Dealer called to confirm it was the ICCU issue. Good news is that they can get the part and get the fix done tomorrow - silver linings and all that.