This Problem Across All Years
On June 3, 2025, I experienced a terrifying and dangerous incident while driving my 2023 Hyundai Tucson Hybrid on a three-lane road at approximately 50 mph. Without any warning, the gas pedal became completely unresponsive, and the car abruptly decelerated from 50 to 20 mph. This sudden loss of acceleration was incredibly frightening, especially with vehicles close behind me that nearly collided with mine. There were no warning lights or check engine alerts. Fortunately, I was able to safely cross all lanes and pull over before having the vehicle towed to a local Hyundai dealership. I shudder to think what might have happened if this had occurred on a highway at higher speeds. This is not the first time I’ve experienced serious issues with this vehicle. In February 2024, at about 17,000 miles, I received an urgent alert recommending a system check. At that time, the car was revving while idle and would occasionally lurch at low speeds. The dealership had difficulty diagnosing and resolving the issue, and my vehicle remained in the shop for over a month before they ultimately replaced the oxygen sensor. Since then, the car has continued to lurch intermittently — for example, when backing out of a parking space or in stop-and-go traffic. In fact, approximately 10 minutes before the June 3 incident, the vehicle lurched several times while moving slowly in traffic. When the car began to lose speed during the most recent incident, I pressed the gas pedal all the way down, but it failed to respond at all. I believe the current issue may be related to the unresolved problems from last year and represents a significant and recurring safety concern. I’ve also read in Tucson owner forums that other drivers have experienced similar issues, suggesting this may be part of a broader, systemic defect. At this point, I do not feel safe driving this vehicle. I truly believe this car is a lemon. This vehicle is still at the dealership, but they have not given me any updates yet.
On June 3, 2025, I experienced a terrifying and dangerous incident while driving my 2023 Hyundai Tucson Hybrid on a three-lane road at approximately 50 mph. Without any warning, the gas pedal became completely unresponsive, and the car abruptly decelerated from 50 to 20 mph. This sudden loss of acceleration was incredibly frightening, especially with vehicles close behind me that nearly collided with mine. There were no warning lights or check engine alerts. Fortunately, I was able to safely cross all lanes and pull over before having the vehicle towed to a local Hyundai dealership. I shudder to think what might have happened if this had occurred on a highway at higher speeds. This is not the first time I’ve experienced serious issues with this vehicle. In February 2024, at about 17,000 miles, I received an urgent alert recommending a system check. At that time, the car was revving while idle and would occasionally lurch at low speeds. The dealership had difficulty diagnosing and resolving the issue, and my vehicle remained in the shop for over a month before they ultimately replaced the oxygen sensor. Since then, the car has continued to lurch intermittently — for example, when backing out of a parking space or in stop-and-go traffic. In fact, approximately 10 minutes before the June 3 incident, the vehicle lurched several times while moving slowly in traffic. When the car began to lose speed during the most recent incident, I pressed the gas pedal all the way down, but it failed to respond at all. I believe the current issue may be related to the unresolved problems from last year and represents a significant and recurring safety concern. I’ve also read in Tucson owner forums that other drivers have experienced similar issues, suggesting this may be part of a broader, systemic defect. At this point, I do not feel safe driving this vehicle. I truly believe this car is a lemon. This vehicle is still at the dealership, but they have not given me any updates yet.
While traveling out of town, our 2023 Tuscon HEV with 31,000k started chugging/hesitating during acceleration. This chugging continued to worsen, so we took it to a Hyundai dealership to diagnose. We were told that fuel injector #3 was misfiring, and, as they did not have the parts in stock, that it would be safe to make the 5 hour drive back home to service the vehicle. During the first 4 hours of the drive the chugging/hesitating worsened, several times suddenly losing power and speed dropping from 70 or so mpg, to 40 mpg and lower, creating extremely harrowing and dangerous conditions from the higher speed drivers behind and around us on the highway. During the last hour of the drive, the vehicle started making a screeching sound, and emitting a burning smell, and chugging so convulsively that we made an emergency detour to drop it at the closest Hyundai dealership. The second dealership said that they could not use the 1st dealerships diagnosis, and that they would need to do their own assessment. Almost 2 weeks later, we were informed that the vehicle was fixed and that issue was a cracked tensioner belt and that likely is what set off the other code(s), including the fuel injector code. Upon picking up the vehicle we discovered that the same chugging issue was still occurring and returned it to dealership #2. They ran another diagnostic and determined that fuel injector #3 needed to be replaced-the issue that dealership #1 originally diagnosed. We were also told that, the problem is with the outsourced company that makes the fuel injectors, and that this is a recurring issue with the other injectors. Unfortunately, Hyundai has yet to take responsibility and save its customers a lot of inconvenience and safety concerns, by allowing dealerships to go ahead and replace all of the fuel injectors at once when the 1st one goes bad.
While traveling out of town, our 2023 Tuscon HEV with 31,000k started chugging/hesitating during acceleration. This chugging continued to worsen, so we took it to a Hyundai dealership to diagnose. We were told that fuel injector #3 was misfiring, and, as they did not have the parts in stock, that it would be safe to make the 5 hour drive back home to service the vehicle. During the first 4 hours of the drive the chugging/hesitating worsened, several times suddenly losing power and speed dropping from 70 or so mpg, to 40 mpg and lower, creating extremely harrowing and dangerous conditions from the higher speed drivers behind and around us on the highway. During the last hour of the drive, the vehicle started making a screeching sound, and emitting a burning smell, and chugging so convulsively that we made an emergency detour to drop it at the closest Hyundai dealership. The second dealership said that they could not use the 1st dealerships diagnosis, and that they would need to do their own assessment. Almost 2 weeks later, we were informed that the vehicle was fixed and that issue was a cracked tensioner belt and that likely is what set off the other code(s), including the fuel injector code. Upon picking up the vehicle we discovered that the same chugging issue was still occurring and returned it to dealership #2. They ran another diagnostic and determined that fuel injector #3 needed to be replaced-the issue that dealership #1 originally diagnosed. We were also told that, the problem is with the outsourced company that makes the fuel injectors, and that this is a recurring issue with the other injectors. Unfortunately, Hyundai has yet to take responsibility and save its customers a lot of inconvenience and safety concerns, by allowing dealerships to go ahead and replace all of the fuel injectors at once when the 1st one goes bad.
When vehicle is just slightly moving and the accelerator is depressed, the vehicle does not respond, zero acceleration. This issue is repeatable and poses a hazard when cross traffic is coming. Wether in Eco, Smart or Sport mode, it has this non-accelerating issue.
When vehicle is just slightly moving and the accelerator is depressed, the vehicle does not respond, zero acceleration. This issue is repeatable and poses a hazard when cross traffic is coming. Wether in Eco, Smart or Sport mode, it has this non-accelerating issue.
Unknown what fails. After driving approximately 30 minutes on a highway, car suddenly stops accelerating and bucks a bit as it slows. Must turn off car and turn it back on to accelerate again. Happens on the highway frequently. Very dangerous as there’s no way to accelerate. Only stop. It’s like it can’t find a gear and the engine revs. It happened 6 times during a 2.5 hour drive.
Unknown what fails. After driving approximately 30 minutes on a highway, car suddenly stops accelerating and bucks a bit as it slows. Must turn off car and turn it back on to accelerate again. Happens on the highway frequently. Very dangerous as there’s no way to accelerate. Only stop. It’s like it can’t find a gear and the engine revs. It happened 6 times during a 2.5 hour drive.
ATTEMPT TO ACCELERATE AND WILL NOT ACCELERATE AND CAR START OVERHEATING AND BAD ODOR SMOG COMING OUT FROM THE EXHAUST. DEALER FOUD THE FOLLOWING, CONCERN SCANNED FOR CODES, FOUND CODES P111100, P030000. P030100, P030300, P030400 ABNORMAL COMBUSTION DETECTION FOR ANY CYLENDER, RAMDON CYLINDER MISFIRE DETECTED CYLINDER #1,2,3,4 MISFIRE DETECTED, PERFORMED FUEL TEST FOUND ALCOHOL AT 5% FOUND FUEL WAS DISCOLORED AND SMELL VARNISH OR CONTAMINATED, DEALER STILL HAVE THE CAR AND THEY WANT US TO PAY FOR THE REPAIRS AND VOID THE WARRANTY, WE CONTACT THE STATE TO DO A FUEL TEST TO THE GAS STATION AND EVERYTHING IS WITH THE GUIDELINES BASE ON THE REPORT, LOOKS LIKE THE CAR IS DEFFECTIVE AND SOMETHING NEEDS TO CHECK
ATTEMPT TO ACCELERATE AND WILL NOT ACCELERATE AND CAR START OVERHEATING AND BAD ODOR SMOG COMING OUT FROM THE EXHAUST. DEALER FOUD THE FOLLOWING, CONCERN SCANNED FOR CODES, FOUND CODES P111100, P030000. P030100, P030300, P030400 ABNORMAL COMBUSTION DETECTION FOR ANY CYLENDER, RAMDON CYLINDER MISFIRE DETECTED CYLINDER #1,2,3,4 MISFIRE DETECTED, PERFORMED FUEL TEST FOUND ALCOHOL AT 5% FOUND FUEL WAS DISCOLORED AND SMELL VARNISH OR CONTAMINATED, DEALER STILL HAVE THE CAR AND THEY WANT US TO PAY FOR THE REPAIRS AND VOID THE WARRANTY, WE CONTACT THE STATE TO DO A FUEL TEST TO THE GAS STATION AND EVERYTHING IS WITH THE GUIDELINES BASE ON THE REPORT, LOOKS LIKE THE CAR IS DEFFECTIVE AND SOMETHING NEEDS TO CHECK