P0A3C on Hyundai: How to Diagnose & Fix
Drive Motor "A" Inverter Over Temperature
1 Hyundai model · 1 documented issue · 1 critical
P0A3C on Hyundai by model: symptoms, diagnosis and fix
The newest Elantra Hybrids are subject to a recall covering the hybrid power control unit, the assembly that houses the inverter and DC-DC converter and manages power flow between the high-voltage battery, the drive motor and the 12V system. The HPCU assembly may overheat. Thermal events in an inverter of this kind typically show first as a hybrid-system warning and a forced power derate, and can end in a loss of drive power; the underlying risk with any overheating high-voltage power electronics is a fire. This affects 2024-2026 Elantra Hybrid vehicles only - it is not a defect of the conventional 2.0L Smartstream Elantra, whose driveline has no HPCU at all.
Common Symptoms
- Hybrid system warning lamp illuminates
- Sudden reduction in available power / limp mode
- Loss of drive power
- Warning message to check the hybrid system
How to Fix
Free recall remedy. Under NHTSA campaign 26V308000 dealers install a software update to the HPCU at no charge - the software manages inverter thermal load rather than replacing hardware. Owners should verify VIN eligibility at nhtsa.gov/recalls and get the update promptly rather than waiting for a symptom, since the campaign is preventive. If the hybrid system warning lamp, a sudden power derate or a burning-electrical smell appears, stop driving and have the car towed rather than continuing.
Sources for this issue (2)
P0A3C code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0A3C mean on a Hyundai?
P0A3C stands for "Drive Motor "A" Inverter Over Temperature." The inverter/power electronics driving motor 'A' has exceeded safe operating temperature, forcing a derate to protect the IGBTs/power module. On Hyundai it is documented across 1 model: Elantra.
What are the most common causes of P0A3C?
The most common causes of P0A3C are: Inverter cooling problem (low coolant, weak pump, air, failed fan), High sustained load, Failed inverter cooling components, Accurate high-temp reading. The specific cause varies by vehicle.
How much does it cost to fix P0A3C on a Hyundai?
Repair costs vary widely with the root cause and Hyundai model; each issue on this page carries its own estimate where one is published.
Looking for P0A3C on a different make?
View P0A3C across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.