The Ioniq Plug-in Hybrid has been assigned 27 technical service bulletins (TSB). The 2019 model year has been involved in the most bulletins.
TSBs contain recommended steps and procedures for diagnosing or repairing a known problem. They are issued directly by Hyundai to service technicians. You'll often see TSBs used as evidence in lawsuits when owners feel the automaker should help with repairs.