2014 Hyundai Sonata electrical system problems

“Odometer Fraud. The contact owns a 2014 Hyundai Sonata. The contact purchased the vehicle on April 28, 2025, with 28,974 miles from a dealer. On January 20, 2026, while attempting to start the vehicle after being parked for a while, the vehicle lost power and failed to start. The contact walked to an AutoZone nearby, where a mechanic diagnosed that the battery and starter needed to be replaced. The vehicle was repaired while with the mechanic, and the contact was informed that the actual mileage on the vehicle was 170,123. The contact reported the issue to the dealer and was informed that it would be investigated; however, the contact had not received any additional information. The dealer had taken possession of the vehicle and informed the contact that payments were still expected despite the odometer discrepancy. The manufacturer was informed of the failure and the odometer discrepancy. The failure mileage was not provided.”

“While driving with my family on a busy freeway at approximately 70 mph, our vehicle suddenly displayed a loud, urgent warning: “Hybrid System Warning – Safely Stop and Do Not Drive!” At the same moment, the car lost the ability to accelerate without any prior signs of trouble. We were extremely fortunate to have enough momentum to coast to the shoulder and shut the vehicle off, unsure of how serious the issue might be. Being stranded without warning on a high‑speed highway put my entire family in a dangerous situation. After a few minutes, we restarted the car to see if we could at least get it off the freeway. The warning had disappeared, and the vehicle drove normally, allowing us to take back roads home. The lack of any prior symptoms makes this even more concerning. Losing acceleration at highway speeds with no warning is a major safety hazard. We took the vehicle to a dealership immediately, but because the warning light was no longer active, they were unable to diagnose the problem. A few days later, the same warning appeared again—this time only a couple minutes from home. I turned around immediately for safety, parked the car, and once again the warning…”

“The High-Voltage (HV) Hybrid Battery Pack Assembly failed, resulting in a system shutdown and the required replacement. The primary code is DTC P0A80 ("Replace Hybrid Battery Pack"), which indicates an internal manufacturing or design flaw, specifically a weak battery module or compromised internal connection, not normal wear. The defective component (the high-voltage battery) is currently at and is available for inspection. The entire vehicle is also compromised by the Anti-Lock Brake System (ABS) Module defect (NHTSA Recall 23V-651000). My safety was put at risk in two primary ways: 1. Immediate Loss of Power: The hybrid system failure resulted in a loss of drivetrain power, rendering the vehicle nearly immobile. This occurred on at approximately mph, placing me at high risk of a collision. 2. Latent Fire Risk: My vehicle is covered under the NHTSA ID 23V-651000 fire risk recall due to the ABS module. Hyundai specifically advised owners of these vehicles to "park their vehicles outside and away from structures" until the remedy is complete, confirming the severity of the latent fire hazard. The failure of the secondary HV battery system occurred within this…”

“The electrical in the entire car is malfunctioning. Sometimes the brake lights don’t work due to wiring, other times the seats control don’t work and the cables to battery is not connected/firing correctly. Has an entire electrical issue”

“Dear Sir/Madam, I am writing to file a formal safety complaint regarding a dangerous incident involving my Hyundai Sonata Hybrid (VIN: [XXX] ) and Hyundai Motor America’s failure to fully correct the issue. Incident Summary: While driving on the freeway, the vehicle suddenly displayed the following alarming warnings: “Hybrid System Warning! Safely Stop and Do Not Drive” “Check Charging System” Immediately after these messages appeared, the car lost all power and shut down in the middle of the road. I had my two young children (ages XXX and XXX) in the car, making the situation extremely unsafe and traumatic. The vehicle lost all mobility and provided no opportunity to safely pull over. After contacting Hyundai Corporate multiple times, a case manager was eventually assigned to my case. At Hyundai’s request, I towed the vehicle to AutoNation Hyundai Valencia for diagnostic evaluation. The dealership diagnosed the issue as error code P0A78, indicating a transmission failure. Hyundai Corporate offered to cover 60% of the repair cost, leaving me responsible for the remaining 40%—an amount that exceeds the current value of the vehicle. This proposed resolution is…”

“Formal Complaint – Hybrid System Failure, Safety Risk (VIN: [XXX] | Hyundai Case #[XXX]) Dear Sir/Madam, I am writing to file a formal safety complaint regarding a dangerous incident involving my Hyundai hybrid vehicle (VIN: [XXX] ) and Hyundai Motor America's failure to respond meaningfully to repeated requests for assistance. Incident Summary: On [XXX], while driving with my two young children (ages [XXX] and [XXX] ), my vehicle suddenly displayed the following critical warnings: “Hybrid System Warning! Safely Stop and Do Not Drive” “Check Charging System” Immediately after these messages appeared, the car lost all power and came to a complete stop in the middle of the road. This created an extremely hazardous and distressing situation for me and my family. Although the vehicle is a few years old, it has very low mileage (38,345 miles), and I did not expect such a catastrophic failure. I submitted a report to Hyundai Customer Support on May 30, 2025 (Case #[XXX]) and followed up on June 9, 2025, but have only received an automated acknowledgment—no response, investigation, or support to date. Attachments: A video clip showing the warning messages at the time…”