2023 Hyundai Santa Fe PLUG-IN Hybrid

The fuel range calculation is often very wrong in our plug in hybrid. This issue has been brought to the attention of the manufacturer and dealer with no results but pointing at the other organizations. With a full fuel tank the gasoline range should be about 387 miles. Often the computer will show 610 miles but sometimes has other ranges but has never been correct after the first fill up. While this normally isn't a big problem, there is a danger for some people. Say you see a sign on a curvy mountain road with no shoulders showing the next fuel is in 100 miles. If the car computer says you have a range of 150 miles, you would think you can easily make it to the next gas station. However, because of the computer error, you really only have a range of 95 miles. It is probable that you would run out of fuel, losing power steering and power brakes. Additionally you could end up stopped blocking the lane and causing a collision. This has been occurring for three years, ever since our first fill up of the gas tank.

The contact owns a 2023 Hyundai Santa Fe. The contact stated that while driving at 40-45 MPH, the sunroof exploded outward without warning or impact, leaving the shattered glass rattling. There were no reported injuries. A local dealer was contacted but stated that they did not perform glass replacements. The vehicle was neither diagnosed nor repaired. The manufacturer was not contacted. The failure mileage was approximately 62,800.

While on the highway my car lost power, gradually slowing down to a stall. I was able to safely park on the side of the road. I got the car to a nearby dealership that kept it for 10 days. The dealership said that the problem was code P2118 (Throttle Actuator Control Motor Current Range/Performance) that the air "flap" was frozen stuck shut and the engine was disabled on the freeway in order to prevent damage. The resolution was "waited for it to thaw and cleared the code". The dealer has a service bulletin and a software update but it did not resolve the safety issue. I've noticed hesitation when accelerating the car from a dead stop as well, which started last year.

While operating the vehicle, the cruise control turns off without any warning. The warning messages that come up only after the cruise control is turned off by the vehicle state "Smart cruise conditions not met" and "forward safety system disabled. Radar blocked". This disables the vehicle from utilizing cruise control in any manner. This happened on the highway with the cruise set at 72 mph, with a semi truck right behind my vehicle in moderate traffic! The semi slammed brakes on and after initial shock, I was able to accelerate the vehicle somewhat to avoid a collision. The dealership claims that "ALL" new vehicles do this when operated in wintery weather, snow, or mud kicked up from the road, or when sensors get iced over. They claim that there is NO reprogramming that can be done to fix this HUGE safety issue. I have NEVER heard of this or experienced this in any other vehicle other than this Hyundai Santa Fe! As a disabled veteran, this honestly scared the hell out of me and makes me very leery to operate the vehicle in the wintertime time and I am the primary driver for the family! At the time of the incident, it was not snowing, the temperature was approximately 36 degrees, and the roadways were clear of snow or ice! The only thing that could be noted was that the roadway was wet, and after stopping, there was sand or salt film in the front of the vehicle. As a disabled veteran with a lower back injury and radicular pain down both legs, I rely on a vehicle's cruise control when driving more than short distances, in order to not cause lower back or leg pain while driving! This issue with the cruise control stopping operation and not allowing the cruise to be restarted is both a HUGE safety issue for both the operator and all vehicles around/near the vehicle on/at highway speeds, and a violation of the ADA (Americans with Disabilities Act). With no way to reprogram or reset this awful feature, the Hyundai Santa Fe is unsafe for disabled individuals.

Two issues with powertrain/transmission: 1- The powertrain/transmission fails intermittently- vehicle RPM goes sky high but vehicle receives no power, seems to fail/lose power. Has happened in very dangerous road conditions where unexpectedly was struggling to get the motor to engage/get power to the vehicle. Check engine and check hybrid system lights accompanies the problem. 2- The car should be driveable in electric only mode without use of gasoline. The powertrain/transmission seems to struggle to shift between electric and gas motors. HYUNDAI cannot seem to correctly diagnose or fix the issue. Does not seem they have proper diagnostic process included on the car- despite finding error messages stored in computer, they initially said they could not recreate the problem and therefore could not fix. 3 different trips to Hyundai dealership repair center, in total they have had my car for 10 weeks. They have replaced the transaxle and sent the car home, but that did not cure the issue. They now have my car again. It just does not seem they know how to identify or fix the issue. From online forums, I have learned MANY owners are experiencing the same problem and the same challenge to diagnose.

>>>>What component or system failed or malfunctioned, and is it available for inspection upon request? According to the Hyundai Bluelink app, the problem is caused by the battery management system, producing error code P0AA600. The result is that the vehicle does not get power to the wheels for a few seconds after giving it gas. It looks like the car is not moving, then it very slowly gains speed, followed by sudden acceleration. It is available for inspection upon request. >>>>How was your safety or the safety of others put at risk? It is a safety issue because other vehicles on the road may not be able to stop in time when the car pauses unexpectedly. Also the driver cannot predict when the car will surge forward. Merging or crossing traffic is very dangerous. >>>>Has the problem been reproduced or confirmed by a dealer or independent service center? The vehicle has been to the dealership two times to be inspected for this problem. They state that they cannot duplicate the issue but of course they can see the error code in the vehicle history. It is an issue that occurs at random; not every time the car is driven. It has occurred a total of 9 times during the 2,872 miles we have driven since we purchased it. >>>>Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Only the dealer has inspected the vehicle. Police, insurance, or others have not been involved. >>>>Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? There is no warning that the error is going to occur. There is a warning when it is occurring, and the check engine light comes on. We purchased the car as new when it had 6,934 miles on it. It had been used as a demonstration car for the dealership. The error first occurred at about 7500 miles.