P1A90 on Hyundai
On Hyundai and Kia electric cars, a fault in the integrated charging control unit (ICCU), which supplies power to the 12-volt system
Severity: Stop — don't drive this car
Owners of the Ioniq 5 and EV6 describe a pull-over or "stop vehicle" message, a speed-limited "turtle" mode and a dead car after this code, and the 12-volt system can fail, so treat it as do not drive.
Need a tow? Find one near youThis page covers only what differs on Hyundai. For what P1A90 means, the ranked causes and the test order, see the P1A90 guide.
What's different on Hyundai
HyundaiYour car
2022–2024 · Ioniq 5
Supported by vehicle dataSeveral 2022-2024 Ioniq 5 owners told NHTSA about P1A90 with an ICCU failure and a car that went into turtle mode or would not move; dealers confirmed ICCU failure. Complaints, not a bulletin.
Sources and review
- NHTSA complaint ODI 11509852
- NHTSA complaint ODI 11702654
- NHTSA complaint ODI 11653352
- Last reviewed
- Written by
- Saurabh K.
- Editorial review
- Pending
- Technician review
- Technician review pending
This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error