2025 Hyundai Santa Fe Hybrid acceleration problems

Filed Oct 1, 2026 · Acceleration, Engine · VA

The vehicle repeatedly loses motive power while being driven at highway speed. It slows even with the accelerator pressed to the floor, does not shift into higher gears, and drops to 40 to 50 mph. On [XXX], the vehicle lost power at highway speed while I was driving. I had to stop on the shoulder of the hwy. The vehicle could not be driven and was towed to the dealer. The dealer opened R.O. No. [XXX] on 9-3, recording mileage in of 23,595. It inspected the vehicle and confirmed the concern. It replaced the fuel rail pressure sensor (Part No. 35342-2M400) under warranty, confirmed a good idle with no codes, and performed a test drive of about three miles. The dealer reported the vehicle ready on 9-15-26; mileage out 23,596. On [XXX], within a few miles of picking up the vehicle after the first repair, the malfunction indicator lamp illuminated. We returned the vehicle to the dealer the same day; the dealer recorded the mileage in as 23,602. The MyHyundai app shows active Diagnostic Trouble Code P00BD00 (Mass or Volume Air Flow "A" Circuit Range/Performance — Air Flow Too High), powertrain system, recorded at 23,600 miles, with a listed date of [XXX]. The dealer returned the vehicle on [XXX]. On [XXX], four days after the 2nd repair, we brought the vehicle back to the dealer. We reported that it was idling high, at about 1,200 to 1,900 RPM while stopped, and that we had heard a low clicking sound since the repair. The dealer did not keep the vehicle. The next morning, [XXX], about 7 miles from home, the vehicle lost power on a bridge on [XXX]. It slowed to about 50 miles per hour and did not appear to shift. I stopped on the bridge with my [XXX] daughter in the car. VDOT responded. My husband and I switched cars. [XXX] then drove the vehicle. After about two miles it again lost power, and he had to leave the highway and use secondary roads at low speed to get to the dealer. The car is currently at the dealership. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 23, 2026 · Acceleration, Engine · SC

The primary component failure is within the hybrid powertrain control architecture, specifically involving the transmission control system or internal transmission clutches/modules (TCM/HEV control module). The vehicle utilizes a 6-speed automatic transmission integrated with an electric motor. During highway cruising, the transmission locks into a single gear ratio or a protective "limp mode," resulting in a total loss of normal acceleration despite high engine RPMs. The vehicle and its components are fully intact and available for inspection upon request. My safety and the safety of others were put at severe risk because the sudden, unexpected loss of acceleration occurred while traveling at highway speeds in active traffic. When the transmission locked and power cut out, the vehicle rapidly shed speed and dropped to a hazardous 20-35 mph on a high-speed roadway. This created an immediate, extreme risk of a high-speed rear-end collision from vehicles traveling behind me, forcing me to make defensive lane changes toward the shoulder without normal engine power to navigate safely. This happens without warning no notices or errors pop up when it happens. The issue is intermittent and has been presented to an authorized Hyundai dealership technician multiple times. Because the vehicle often resets its communication modules and temporary limp-mode parameters once the ignition cycle is turned completely off and back on, the dealership technicians have encountered difficulty pulling permanent historical diagnostic trouble codes (DTCs). However, the failure patterns match a widely documented, repeating issue among 2025 Santa Fe Hybrid owners regarding HEV torque calculation or loose engine wiring harness pin tension

Filed Sep 4, 2026 · Acceleration, Engine · TX

First Incident – XXX Weekend ([XXX]) Accelerating at an on-ramp to a major highway (I-37S) in [XXX], vehicle suddenly lost power. Speed dropped from 60 mph to 45 mph, then 28 mph, in a 65 mph zone during rush hour traffic. No apparent cause: had ¾ tank of fuel, a clean maintenance history, and no prior issues. Managed to reach the shoulder and, after several minutes, able to exit the highway. Vehicle would not accelerate above 35–45 mph and stayed around 30mph, and the hybrid battery showed less than 25% charge. Notified Red McCombs Hyundai (original seller). When a loaner vehicle became available, we brought the Santa Fe in. After a week, the dealership stated they could not duplicate the problem and returned the vehicle to us. Second Incident – XXX ([XXX]) On a planned trip from [XXX] to [XXX], again experienced a sudden and severe loss of power. While merging onto I‑10W, in [XXX], the vehicle speed dropped from 80 mph to 60, then 50, then 38 mph. Able to avoid a collision because of an unusually wide median where I could safely stop. Used GPS to find a local Hyundai dealer - Casa Hyundai of [XXX] - and drove there, using surface roads only. Turned vehicle in for maintenance and continued trip using a loaner vehicle. Casa Hyundai reported, days later, that despite logged error messages indicating problem with hybrid system and advising user to immediately stop, they were unable to isolate problem. Third Incident – XXX (Unknown location in [XXX]) Entering I-10E after fuel stop (80mph zone) and accelerating hard on a slight incline, again experienced sudden loss of power, slowing to less than 40 mph. Drove on shoulder for two miles to next exit 284 and stopped w/motor running to recharge. No error codes or warnings displayed on dash. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 28, 2026 · Acceleration, Engine · WV

When traveling home from work 8/27/26, my cruise control shut off and my car immediately went into “limp” mode. This almost caused me to get into an accident with a tractor trailer, in which, I may not have survived. Immediately pulled over and tried to find out what had caused this and how to get it fixed. Nothing worked to get it out of “limp” mode. There were no warning lights or messages, except LV3. Which was a completely different issue. This issue I was able to correct. Tried fixing the “limp” mode issue by doing as told by Google AI, turn car off, lock door with key fob, waiting 10-15 minutes for computer to reset. NOTHING. Also tried checking to see if there was a battery dump, in which this case would have been the fuel system not communicating with the hybrid battery system, NOTHING. I do have an appt with the dealership on 9/2/26 to have this looked at and inspected. I have not tried to start and or drive the car again, since. Do not want to be blamed by the dealership or manufacturer, that I did something wrong or caused more issues.

Filed Aug 20, 2026 · Acceleration, Engine · TX

sudden loss of propulsion / limp mode, particularly under load or at highway speeds.

Filed Jul 27, 2026 · Acceleration · MT

Vehicles accelerated on its own when going under 10mph and no pressure on pedals.

Filed Jun 21, 2026 · Acceleration, Engine · MA

The car went from 70 miles an hour to 25 miles an hour all of a sudden on the highway and then would not allow to accelerate afterwards. Battery stopped charging and we had to stop it multiple times to get it to continue to drive no faults or issue on the dashboard.

Filed Mar 28, 2026 · Acceleration, Engine · NY

Gas Motor is not engaging to assist electric drivetrain on a hybrid AWD 2025 Santa Fe. This resulted in a dangerous situation crossing a busy road from a stop sign. The Santa Fe rolled into the intersection at the drivers request, but did not accelerate normally (only to a maximum of a few miles per hour) and felt like an eternity to cross the road. Fortunately oncoming drivers from left and right were paying attention and slowed down and in one case honked aggressively to point out we driving badly. Pulling over to the side of the road, turning the vehicle off and then back on again has sometimes made it run normally, but we limited our trips at that point to first getting safely home and then delivering it to the dealer. The 20 mile drive to the dealer required pulling over twice to reset the vehicle so the electric motor would assist. We have had repeated warnings from the onboard system including "Follow up checks required - Engine Management System" and "There may be a problem with the engine management system Contact your Dealer". I will note that we have 11,000 miles and 11 months experience with the vehicle with NO problems. It may not be relevant, but these new faults began 2 days routine service for oil and tire rotation when recall was performed including ECU Software Update for Recall 25-01-028-1. Dealer is uncertain of problem and referring with outside tech assistance from Hyundai but we were told to expect 2 weeks for parts and repair and uncertainty as to whether that would fix it. In the meantime a vehicle with unreliable acceleration and top speed is unsafe and parked. I do note on this the federal safety agency website 2025 HYUNDAI SANTA FE HYBRID SUV AWD that there are 47 Complaints. 9 relating to this problem all beginning October 2025 and none prior back to the first post of Nov 2024 for this model. Complaints similar to this for engine management and speed and power loss account for 50% of complaints for this vehicle on the NHSTA website since October 2025.

Filed Mar 23, 2026 · Acceleration, Engine · MI

Vehicle would not accelerate in high speed zone.

Filed Feb 6, 2026 · Acceleration, Fuel system · NH

The 2025 Hyundai Santa Fe Hybrid has had multiple occasions, most recently on February 3, 2026 with 12,330 miles on the car, where the gas-powered engine fails to provide any power to the drivetrain. The car experiences vast power loss and enters "limp mode" where only the small hybrid battery is powering the vehicle. Max speed ranges from 10 - 25mph and there is little, if any, acceleration, even when the gas pedal is pegged to the floor. It is necessary to pull over, engage the flashing safety lights and try to find a safe place to park. After turning the vehicle off and on several times, eventually, the gas engines re-engages. The first incident of this type for this vehicle was on August 7, 2025 with approximately 4,400 miles on the vehicle. It was taken to the dealer, Key Hyundai of Salem, who could not find any DTCs and could not replicate the problem. They said "bring it back if it happens again." They next time was on February 3, 2026 where it happened several times on a trip to and from a local restaurant. This time, at DTC code of P088000 POWERTRAIN / POWERLOSS was recorded and reported. However, by the time the car was seen by Key Hyundai of Salem on February 5, 2026, the code has cleared itself. Hyundai's corporate policy is that historical codes can not be used for Warranty claims. So, the dealer tried one potential fix, cleaning the TCM connectors under the driver's seat, and returned the vehicle stating that Hyundai corporate would not authorize warranty work unless/until the car was presented to the dealership with a current / live DTC or visible broken parts. It seems unsafe to put a vehicle back on the road that could lose power and drivability at any time for no apparent reason. I am aware that there have been several other reports of similar POWER LOSS / LIMP MODE situations by owners of 2024-25 Hyundai Santa Fe Hybrids. At the moment, I am told that there is no current Technical Service Bulletin on this from Hyundai.