Vehicle Speed Control Problems of Hyundai Santa Fe - part 1

Vehicle began running sluggish, gas smell noticed. Vehicle was due for oil change, took car in for oil change to aaa and mentioned gas smell. Aaa identified gas leaking from fuel pump posing immediate safety issue that needed to be resolved.

See all problems of the 2020 Hyundai Santa Fe 🔎.

Over the past month, on two occasions my vehicle has emitted gasoline fumes filling my garage, and today my interior cabin smelled like gasoline. Additionally, after warming up, my vehicle experiences acceleration drop/stuttering when accelerating after idling. This happens every day. I took the car to two dealerships (san tan Hyundai and chapman Hyundai scottsdale) and they weren’t able to diagnose the issue.

Component/system: the powertrain launch control system — the transmission control unit (tcu) and 8-speed wet dual-clutch transmission paired with the 2. 5t engine — fails to deliver engine power in response to full accelerator input from a stop. The engine does not rev and the vehicle does not move for approximately 1–2 seconds despite the accelerator pedal being fully depressed, then power engages abruptly and violently. The vehicle is available for inspection upon request. Safety risk: the failure occurs when launching from a stop into intersections and cross-traffic. In the most recent incident, I was turning left across the roadway from a stop with an oncoming vehicle approaching. I applied full accelerator and the vehicle did not respond at all for approximately 2 seconds — no engine response, no movement — leaving me stationary in the oncoming vehicle’s path. Power then engaged violently and without warning, causing the vehicle to lurch across the road. I was nearly struck. Similar events have occurred multiple times throughout my ownership; this was the closest to a collision. Dealer confirmation: not yet inspected by a dealer. A dealer service appointment is being scheduled. Other inspections: the vehicle has not been inspected by the manufacturer, police, or insurance representatives. Warning lamps/prior symptoms: no warning lamps or messages have appeared before, during, or after any of the events. The failure is intermittent and occurs without warning. The condition has been present since I purchased the vehicle in October 2022 and has occurred regularly throughout ownership — numerous occurrences over more than three years. No warning lamps have ever accompanied it. Additional: condition persists with idle stop & go disabled, ruling out engine-restart delay. Same 8-speed wet dct was subject to recall 236 (NHTSA 22v-746) on 2021–2022 models for similar throttle non-response; 2023 excluded despite identical hardware.

See all problems of the 2023 Hyundai Santa Fe 🔎.

I am reporting a severe safety failure on my 2014 Hyundai Santa Fe sport that perfectly matches the safety defect described in recall 21v-303 / campaign 205. This happened even though I had the dealer perform the official recall fuse fix back in 2024. The problem started after I left the car parked for about 3 to 4 hours. When I came back, I heard a motor (not the motor) loudly running under the hood even though the ignition was completely off. It stayed on even after starting and turning the car off. The battery in the vehicle had drained so bad it was deemed bad when hooked up to a tester at the auto parts store. After getting a new battery and trying to drive the car, the electrical system went haywire. The dashboard lit up with every brake warning light on, the speedometer stopped working, miles to empty being erratic, and the exterior rear brake lights kept flickering erratically after the car was turned off. The steering was acting abnormal and unnatural, not crisp and easy to turn as usual. There were absolutely no warning lights or symptoms before I parked the vehicle. I had it towed to my local Hyundai dealership, and their diagnostic scan confirmed major brake and chassis issues, specifically code c2402 for an abs pump motor circuit malfunction and codes c1200, c1203, and c1206 for a loss of wheel speed data. The vehicle has not been inspected by police or insurance representatives, but it is currently sitting at the dealership waiting for a resolution from a Hyundai customer care case manager. The 2024 recall remedy only involved dropping the fuse amperage to mitigate fire intensity; it did not replace the module housing or prevent the internal brake fluid leak from eventually destroying the system. The defect has seemingly now fully manifested, knocking out primary braking indicators and power steering assist, presenting an ongoing safety and fire hazard while driving and parked.

See all problems of the 2014 Hyundai Santa Fe 🔎.

My check engine light came on, and my car was also feeling "sluggish" and slow to accelerate. I scheduled a service appointment at my local dealer 4 days later. At the appointment, the technician stated everything checked out okay and the check engine light was likely an "anomaly" or "outlier" but otherwise nothing to be concerned about since everything checked out "okay" and no problems were identified during their test drive. However, that very afternoon, I was driving down the interstate, where the posted speed limit is 70mph, when my check engine light came on again and suddenly lost power, drastically reducing my speed and could not accelerate faster than 39mph. Luckily, the interstate was not busy at the time (about 10:30-11:00 a. M. Saturday morning) and there were only less than 4 cars behind me that were able to easily switch lanes and pass me. I moved over to the shoulder to a complete stop and restarted my car. My check engine light remained illuminated and was still slow to accelerate and "sluggish" but was able to (slowly) reach interstate speed (60-70mph) until I reached an acceptable exit and safely made it to my destination. I have since used roadside assistance to tow the vehicle from my home to the the same dealership for inspection and service (again).

See all problems of the 2021 Hyundai Santa Fe 🔎.

First failure occurred 7 months after purchase at 5,270 miles on August 1, 2024. The vehicle suddenly went into "limp mode" abruptly decelerating to 25 mph with a non-responsive gas pedal. A code reader displayed po653 sensor reference: "voltage b circuit high". Dealer found corroded wire to battery and cleaned it. Second failure: horn loss to 1 tone. Fixed at 30k mile dealer service on June 12, 2026 and found to have faulty packing resulting in corrosion. At the same standard service the brake system was flushed. 3rd failure was 5 days and 437 miles (30,712 miles) after the 30k dealer service. On June 17, 2026 during my early morning commute while merging onto the interstate, alarms began to blare and the gas pedal suddenly became unresponsive. The initial alarms read blind spot failure. Car would not accelerate from 40 mph that it was going coming down the bridge ramp so I took the very close off ramp down from the aqua duct and the console display alert showed "engine management system: details: braking and body control system with a recommendation to get "a full system check. . . Today". I brought it to the dealer that afternoon and as of yesterday, 6/26/26 they can find nothing wrong, declaring it an intermittent issue and asked me to come get the car, refusing to continue looking or providing alternate options other than referring me to Hyundai consumer affairs.

Hyundai campaign 9c2 recall update: took my vehicle in to have the Hyundai campaign 9c2 recall update performed on the vehicle on June 9th, 2026. Since the update the vehicle is hesitant/jerky upon first drive of the day or anytime it sits more than a few hours. Occasionally it will do this while I am driving. I feel it is a saftey risk because this could cause my vehicle to abruptly hesitate without braking and cause someone to hit me, or worsetransmission to fail while at highway speeds. I took it back to the dealer that performed the required update around June 23rd 2026 and informed them of the problem caused by the 9c2 campaign update. I got the we don't know anything about it causing problems runaround. Even though it has been documented that dealers were notified of this problem. They then wanted to charge me a $100 diagnostic fee to see if it might be something else, I declined that because I know it is from this update. My vehicle ran perfectly fine and smooth before this update was applied and no cel lights are on. I did this update because it was required to be done by Hyundai. When I started researching why my vehicle was hesitant/jerky after the update is when I found that anyone that did this update is having these same issues, and it has been happening for a while now and Hyundai corporation has done nothing to correct this problem other than tell us to sit for at least 3 minutes or more before driving it. That does not help when it does it even after driving for a bit and possibly creating transmission problems.

See all problems of the 2017 Hyundai Santa Fe 🔎.

The 9c2 campaign software update introduced dangerous vehicle hesitation and unpredictable gear changes in active traffic, presenting and immediate crash hazard.

I was driving down the road and came to a stop at a stop light. After accelerating again my car lost the ability to increase speed above 20 miles/hour and would not shift gears. I was heading to the turn lane to get on the interstate and quickly had to change lanes to find an area to pull over as I could not reach highway speeds. I turned the car off. I turned the car back on and the problem resolved. This is the second time this has happened. I have seen this problem mentioned dozens of time on reddit message boards including Hyundai buybacks on some of these vehicles. It doesn't sound like Hyundai has any idea what is causing this issue. This issue should be looked into further.

After the recent "important service campaign" involving the theta ii emissions logic improvement my vehicle no longer safety shifts into the lower gears. It will not shift into gear. I am unable to safely get up to a normal speed and the engine and vehicle start shaking. This is isolated to the initial start of the vehicle and any low speed driving after. The issue is resolved after restarting the car, suggesting it is a software issue. This issue immediately began after the ecu update for the theta ii emissions logic improvement on 5/12/2026.

After the installation of the service campaign 9c2 engine update, the car now seems to surge or rev up briefly at lower speeds like it can't find the right gear or is trying to briefly accelerate. It doesn't seem to be as noticeable at highway speeds, but in residential or low speeds, it's very noticeable and a little unsettling as the car feels like it wants to briefly lunge forward. No lights are on the dash and there is no indication of any malfunction, but it did not behave this way prior to the 9c2 engine program update. I waited for a couple weeks before contacting Hyundai corporate about this issue because I was hoping maybe the transmission or engine was relearning after a battery disconnection, but it has not gone away.

No power till car warms up for 5 minutes. It will be jerky on highway. The gas mileage is going down drastically, I was doing 32 miles to gallon and now it's 22mpg. All this is after the recall we just had performed. I have no power trying to avoid accidents, taking off from stopping. Car smells weird now.

Abs, traction control lights, emergency braking lights on . . Tire sensors are bad. Causing intermittent issue with the lights. For 3 years I've been trying to get my abs/traction control fixed at Hyundai, that dealership refused to acknowledge there was an issue. I had a code from a car place since I live over an hour away and they said they couldn't use it since it wasn't from them. I have an extended warranty there. Went to another dealership and was immediately told it was the tire sensors. That he used to work at the other dealership and they saw it all the time. I now see palisades have a tire sensor issue. Heck I've been dealing with this for years, and apparently so are many other Hyundai owners, according to this Hyundai employee. Now they're trying to overcharge me and saying my warranty will only cover a quarter of what they want. My deductible is only 100 if I don't get the work done at the original place, the one that said there isn't a problem. I've had it with Hyundai. They are unsafe and don't care about customer service.

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 NHTSA 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.

See all problems of the 2025 Hyundai Santa Fe 🔎.

On March 4, 2026, at approximately 7:30 am est, while driving my 2023 Hyundai Santa Fe limited on [xxx] , the vehicle experienced a sudden loss of propulsion while traveling at approximately 70 mph (posted speed limit). The vehicle would not accelerate or maintain speed and would not move forward when placed in drive, indicating a failure within the powertrain/transmission system. The vehicle is currently located at a Hyundai dealership and is available for inspection upon request. This incident created a significant safety risk, as I was traveling at highway speed in active traffic when the vehicle unexpectedly lost the ability to move under its own power. This placed me at risk of being rear-ended and made it difficult to safely maneuver out of traffic. The vehicle was inspected by a Hyundai dealership. Diagnostic trouble code p284001 (shift fork “d” position) was identified, and I was informed the failure is transmission-related. The condition was reproduced by placing the vehicle in drive, at which point the vehicle would not move. The vehicle has been inspected by the dealership. The manufacturer has been notified but has not physically inspected the vehicle. No police or insurance inspection was involved. There were no warning lights, messages, or prior symptoms before the failure. The issue occurred suddenly without any indication of a problem. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

On February 24, 2026, I had the 9c2 software update. My vehicle was being checked for oil consumption. Since then I have had issues with it hard shifting when first starting to drive and sometimes after I've been driving a while. This has continued miles down the road, sometimes over thirty minutes after driving. It also just feels continuously like it is not driving smooth. This only started after the update. I contacted hma. The first person on my case (gurvinder) told me I needed to return my car, not to drive it. I had bronchitis, so I did not immediately do that. The next person "rainey" told me it is a known issue and they are telling people to warm their cars up for around 3 minutes, and it will be fine. I'd done that, and even driven longer than that. I told him that. I took my mother-in-law home from church miles from there after collecting her at the church door, etc. . . Getting to the hill at to her home, I didn't think it was going to get up it. Often I don't think I'm going to get out of my driveway, a dangerous driveway in a curve. He wanted krause Hyundai to contact hma engineer. When I was at krause, they didn't know how to get ahold of hma engineer. Dalton also said they can't back the update out. I'm on my third hma case manager. She keeps changing what I've told her is wrong in the emails, I don't think she knows anything about cars. She won't listen when I say I spoke to dalton at krause; she keeps speaking to john. John said they can do diagnostic, but it will cost me. I refuse to pay as rainey and gurvinder had months before wanted me to take it back to get fixed, and rainey wanted krause to contact the engineer. It is a known issue with a letter written by Hyundai. Getting a diagnostic code reading performed is not going to help. I'm afraid my vehicle will lose power on the road and I will be struck. I tried uploading both pdf and jpg, but it wouldn't let me.

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.

I tried to drive my 2025 Hyundai Santa Fe hybrid; the vehicle displayed a gear selection error message stating something like "gear already selected". The vehicle would not shift properly and would not power off or restart. I attempted multiple shutdown and restart attempts using the start/stop button with no success. The vehicle remained in this condition for about 30 minutes and would not allow normal operation or shutdown. Due to safety concerns, Hyundai roadside assistance was contacted and a tow truck was dispatched. Before the tow arrived, the vehicle spontaneously allowed shutdown without any intervention. This was a safety related failure involving the shift-by-wire system and vehicle power-down logic. The issue occurred without warning and left the vehicle inoperable. The vehicle had app 7150 miles at the time of the incident.

This car was in a bbb binding arbitration and Hyundai was told to fix: speed control malfunction, speed linit not posting to hub arbitrary fan engagement. The dealership alm west had the car 2 weeks and the car sat on their lot. They said we are unable to duplicate the problem. Now in addition I showed them the cracked windshield and they were not responsible. I had an insurance complaint I took it to safelite and replaced the windshield yesterday and I got it back with a new windshield and it also had a crack in the replacement windshield. I think Hyundai knows there's a problem with the glass which is also part of the safety system of the car.

What component or system failed or malfunctioned, and is it available for inspection upon request? unsure, but likely transmission. I no longer own the vehicle, it is at tom ahl Hyundai in lima, ohio. How was your safety or the safety of others put at risk? when the vehicle was put in reverse, without pressing the gas the car would rapidly accelerate and jerk as if it was going to stall. Has the problem been reproduced or confirmed by a dealer or independent service center? yes, the dealership. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? the manufacturer was working on a fix but unable to figure out the issue, so I returned the car. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? no, no warning lights.

See all problems of the 2024 Hyundai Santa Fe 🔎.

The contact owns a 2024 Hyundai Santa Fe. The contact stated that the anchor in the third row detached. The vehicle rolled while in the drive position. The vehicle failed to accelerate. While reversing, the vehicle jerked. No warning lights the vehicle was taken to the local dealer on five occasions and was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 20,000. The VIN was not available.

I engaged the adaptive cruise control at 50 mph. This enabled the driver attention system which I had turned off at the start of my drive. The driver attention system is unable to see my eyes through my prescription corrective lenses. This caused the Hyundai to throw multiple 'failure to control vehicle/failure to watch road' warnings over the course of a few seconds; culminating with the system trying to stop the car in heavy traffic.

Circuit board inside the fuse box stopped working and there was no speed indicator, no cruise control, no odometer registering while driving. Also the mechanical fuel pump started leaking fuel at 148,000 miles and now at 156,000 miles it is burning through oil and no oil light came on and the engine went into limp mode and is also now going through coolant too.

See all problems of the 2013 Hyundai Santa Fe 🔎.

The vehicle's software was updated on oct 21, 2025. The software has serious flaw. When driving on slight incline on the passing lane the vehicle will apply the brakes without warning. This has happened 3 times. At times, when vehicles were following me they also had to apply the brakes unexpectedly. Had they not applied their brakes, they would have rear ended me at highway speeds. I also recall that there were no vehicles either in front or to the right ahead of me when it occurred. Also there was a guardrail on the left side of the highway at the time. This did not occur with the previous installed software. Every time this happened, the vehicle was in cruise control and driver assist was on to keep vehicle in the lane.

Vehicle began to display front collision avoidance system error/ radar blocked. This also disabled the 'Smart' cruise control features. This happened any time the cruise control was engaged and we encountered traffic. The unit was in the dealer's service department for a week, and the front radar module was replaced and reprogrammed under warranty.

See all problems of the 2022 Hyundai Santa Fe 🔎.

The engine has been running rough for awhile and emissions light came on. My car was having problems accelerating, 2 years ago the light came on but didn’t stay on so the dealer couldn’t diagnose problem.

My wife was parking our vehicle near the front of our home, simply rolling forward toward the car in front of her to complete parking on the left side of the street when the vehicle unexpectedly accelerated on its own. The vehicle turned hard to the right, struck the bumper of the parked car she was pulling up behind, continued right across the traffic lane where it hit two parked cars on the other side of the street with significant impact, lifting and turning one onto the sidewalk, at which point our vehicle went across the sidewalk and stopped after hitting a fence. The forward collision avoidance that we have experienced engaging previously, never engaged, despite hitting multiple vehicles on the lefft side and then right side of the street. The collision avaoidance alarms that we have experienced sounding previously, also never went off. The airbags never deployed, despite hitting 3 cars at two different sides of the street, as well as an iron fence that never moved. The vehicle went from traveling less than 5 mph while completing the last few feet of parking to a high rate of acceleration within a path of less than 40 feet, as evidenced by the significant damage it left. Had my wife not come to a stop as quickly as she did, she could have been seriously injured. If anyone had been on the sidewalk - there are 3 shcools on this block that children are often present - someone could have been killed. The vehicle is currently at a body shop being evaluated by insurance adjuster and likely a total loss. We reported tot the manufacturer and they intend to repsond to us by 9/16 and inspect the vehicle in its current state.

In relation to this incident, approximately 3,00 miles after an oil change, the engine oil drain plug fell out and caused all oil to leak and cause engine damage. Engine oil change was at approximately 125,000 miles. Drain plug fell out at approximately 128,000 miles. No warning lights or symptoms were present prior to vehicle shutting off and dying while driving. Vehicle was then towed to shop who previously did oil change. Shop confirmed drain plug was missing and oil level was empty. I am the manager of this shop submitting this on behalf of the customer with this vehicle. We are aware of the ongoing concerns in relation to case dp22-003 and would like to submit this information as further evidence for this case.

Driver assistant cruise and steering components relating to the warning system. The system notification is turned off in the settings; however, the issue overrides the setting. Cruise control and steering assist shuts off after brief but consistant warning to keep my eyes on the road. My eyes are on the road. I can do nothing to stop it from warning. It may happen up to 20 times in a distance of 9-20 miles. This has occured since purchase and occurs everytime the car is driven. While passing on interstate highways the system may shut off. Acceleration stops, steering assist shuts off. Four dealerships have seen the vehicle and a claim was issued by Hyundai America. A service manager finally, after many request, rode with me after a year of many service appointment resulting in a change of passenger facing camera. No change occurred in the system, it continues to behavior the same a prior to the camera change.

Hyundai's forward attention warning is so aggressively annoying it makes me want to drive off a cliff to shut it up. Driving with an arm in the 12 o'clock position? "beep! keep your eyes on the road!" polarized sunglasses? "beep! I can't see your eyes!" OH, there's a setting! let's turn it off. . . "beeeeep! where are your eyes!". I just purchased and cannot use cruise control I need to wear glasses it has a hard time seeing my eyes I cannot turn off I have tried many positions on steering wheel to no avail.

Seem like it burns oil quick.

See all problems of the 2008 Hyundai Santa Fe 🔎.

I purchased a new 2025my Hyundai santafe hybrid. Since the day of my purchase there has been a constant error message that is displayed on dash saying "driver attention warning system failure". This light stays on constantly and disables cruise control and adapative cruise system. This affects the usability of the vehicles. When asked Hyundai they say, drivers arent expected to wear sunglass if this system has to work properly, they even say constant blinking will cause system to fail and disable cruise control. This is a serious concern. How can people drive a car without blinking and how can a new car have disabled cruise control all the time.

Hyundai disabling critical vehicle safety systems if people wear sunglasses. I brought my2025 Hyundai santafe hybrid, this has driver attention monitoring system. Since the day I brought this vehicle I have been getting issues related to driver attention warning system. This error is being caused for no reason, this comes on when vehicle comes on and stays on (sometimes for days sometimes for weeks and sometimes for hours). Hyundai says this issue is because I have a dash cam in car, error wont go away even when dash cam is removed. Recently Hyundai engineers said its because you may be wearing sunglasses. What? wearing sunglasses will disable aeb and cruise control !!!omg. I removed sunglasses and tried still wont work. Hyundai sent me list of things not to do, including not to laugh, not to shorten your eyes and not to wink. This is a major safety concern, not allowing drivers to wear sunglass which will disable safety critical systems.

I have taken my Hyundai Santa Fe 2022 phev under warranty for a fix of being in reverse, the function not working, the car revs aggressively not in gear and then put it in park and the car aggressively jolts forward in park like a hard gear change. Hyundai replaced pcm and said it was fine. I took car and immediately noticed grinding noises and straight back to Hyundai. They claim it's fine. Today same issue with reversing and aggressive car jolting. Hyundai is going to take it back tomorrow. I do not feel safe in this vehicle. It felt like the transmission was going to give out on the freeway. The rpm are maxing out at 5-20 mph and sometimes don't want to engage in drive. Extremely unsafe for freeway driving. There is something terribly wrong with this cars engine or transmission. Unsafe for Hyundai to release for use.

When accelerating at high speeds, over 70 mph, the car will sometimes appear to slip into neutral, and we are not able to accelerate at all. And then will need to coast to a stop, pull over, shut the car and restart. This has happened five times in the past year and always after one hour or more of driving at high speeds.