VEHICLE SAFETY HAZARD: ACTIVE HIGH-VOLTAGE ISOLATION FAULT (DTC P0AA6) WITH DECEPTIVE DEALER/MANUFACTURER BYPASS & CONCEALMENT. On April 15, 2026, the dealer scanned my 2021 Ioniq EV and uncovered DTC P0AA6 (Hybrid/EV Battery Voltage System Isolation Fault), which denotes a catastrophic high-voltage leak into the chassis. This is a severe safety hazard posing immediate risks of fatal electrocution to occupants, EV battery thermal runaway (fire), or sudden total loss of propulsion at highway speeds. Instead of grounding this dangerous vehicle, the dealership concealed the diagnostic code, withheld the physical invoice, and released the vehicle back to me on April 28, falsely claiming it was "fixed to 100%." They forced me to drive an actively compromised high-voltage system. On May 7, the defect immediately returned while driving. I confronted the dealer on May 8 for merely resetting the car's computer to bypass the safety warning, which is an extremely dangerous fire hazard. The manufacturer has refused to replace the defective EV battery under warranty, or provide alternative transportation. This vehicle has now been grounded and decaying in an open lot for over 95 days. This is a severe systemic manufacturing defect and fraudulent maintenance practice that requires an immediate NHTSA safety investigation.
2021 Hyundai Ioniq Electric
Owners filed 2 complaints about this vehicle with federal regulators, most often about the electrical system › 12v/24v/48v battery. No safety recall has been issued.
| Component | Reports | Crashes | Fires | Injuries | |
|---|---|---|---|---|---|
| Electrical System › 12v/24v/48v Battery | 1 | 0 | 0 | 0 | |
| Electrical System | 1 | 0 | 0 | 0 |
What owners reported
Newest filingsThe contact owns a 2021 Hyundai Ioniq EV. The contact stated that on several occasions the vehicle would not start or could not be restarted after being turned off. The vehicle was towed to the local dealer who was unable to determine the exact cause of the failure but indicated that the failure was related to the 12V battery system. The vehicle was not yet repaired. The manufacturer and local dealer were notified of the failure. The failure mileage was 22,000.
2 of 2 complaints, reproduced as filed.
Reading this record
No unusual pattern of severe incidents in the complaint record.
Complaint counts track how many cars were sold and how long they have been on the road as much as they track quality. A common model from 2013 has had a decade to accumulate reports; a rare one from last year has not. The signal worth weighing is in the severity columns, in whether the same component keeps appearing, and in whether the manufacturer eventually opened a recall for it.
Most recent recall on file: none. Source: NHTSA Office of Defects Investigation.