2017 Hyundai Santa Fe fuel system problems

Filed Oct 29, 2026 · Engine, Fuel system · CO

The engine light came on. Upon driving it on the highway it would lost acceleration but was able to drive under 50 miles per hour about 5 miles. When opened the hood there was fluid splattered on the engine. There is a hole in the upper left quadrant beneath the engine cover.

Filed Sep 19, 2026 · Engine, Fuel system · PA

Hyundai performed recall #9C2, on 7/2/26. Since that time, the engine has a full time miss. When it is cold, it will hesitate, kick and buck. Hyundai is aware of this. Their solution is to warm the car for 3 to 5 minuets before moving. What happens if there is an emergency and you can't wait? Possible accident with injuries trying to pull into, or cross traffic! I have filed a case with Hyundai, and they just update that they are aware and working on a solution with no expected date for the software fix. This is a serious problem, and they need to fix SOON! Also, when an engine runs like this, over a period of time it will destroy the catalytic converter. Who's going to pay for that??

Filed Aug 21, 2026 · Acceleration, Engine · NC

Directly after the dealer, Johnson Hyundai of Apex, completed Service Campaign 9C2 on 4/28/26, my vehicle began sticking, surging, and harshly changing gears. I have followed up with the dealer multiple times. They said they are not getting back any diagnostic error codes (outside mechanic shop also confirmed they're also not seeing error codes), but went ahead and recalibrated the ECM. They told me to drive for 200 miles and the issue should be resolved. I have now driven 1,500 miles and the issue persists. I'm now seeing Hyundai put out a 'Driveability Communication" about this issue, but there is no proposed fix/recall. This issue did not exist before this service campaign was performed by the dealership.

Filed Aug 12, 2026 · Engine, Fuel system · TX

Complete unmitigated loss of acceleration and power while traveling at highway speeds, creating an immediate life-threatening road hazard. Following a warranty engine replacement and mandatory dealer software flash at Clay Cooley Hyundai (Sherman, TX), the vehicle began experiencing powertrain communication issues. While operating the vehicle at 65 MPH on the highway, the vehicle completely failed to accelerate and lost propulsion power, nearly resulting in a catastrophic rear-end collision with an oncoming 18-wheeler semi-truck. Dealership diagnostics claim "no trouble codes present," but live data telemetry confirms the High-Pressure Fuel Pump (HPFP) is actively commanding and delivering a dangerous 1,600 PSI to the fuel rail at hot idle. This abnormal fuel delivery is paired with a severe powertrain stutter in 3rd gear. Service personnel at multiple locations confirm a widespread, high volume of transmission failures and severe drivability issues specifically tied to this recent Hyundai software update. Corporate has denied repair coverage. The vehicle remains an active highway safety hazard and is completely undrivable.

Filed Jul 21, 2026 · Engine, Fuel system · VA

I own a 2017 Hyundai Santa Fe Sport 2.4L (VIN: [XXX]). On XXX, my vehicle received Campaign 9C2 (ECU software update for Theta II emissions improvement). Shortly after this update, I began experiencing a drivability issue that did not exist beforehand. Description of the issue: The problem occurs only after the vehicle has been sitting long enough for the engine to become completely cold, typically overnight. During approximately the first 1/4 mile of driving, the vehicle intermittently jumps, surges, or lurches while accelerating normally. Once the engine warms up, the symptom completely disappears and the vehicle drives normally for the remainder of the trip. There are no warning lights, no check engine light, and no diagnostic messages. The Hyundai dealer has had the vehicle for nearly a week but has been unable to reproduce the concern. Because the issue only occurs during the initial cold start and first portion of the drive, I am concerned that it may not have been tested under the same conditions in which I consistently experience the problem. I am not claiming that Campaign 9C2 caused the issue, but the timing is notable because the symptom began only after the ECU update was performed. I am requesting Hyundai's assistance in determining whether: - the ECU update was installed correctly, - any required adaptation or relearn procedure is incomplete, - there are any related Technical Service Bulletins or software updates, or - additional diagnostics should be performed during a true cold-start drive with live data recording. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jun 4, 2026 · Engine, Fuel system · VA

Hi, my name is [XXX], i bought used Hyndai Santafe sport 2017 from dealership in 2020. It had around 47,000 Miles on it, intitially it was running fine but after driving 2 years i discovered that engine is burning oil and after the oil change right after 1000 miles i had to add a quart of oil and it was like every two weeks. I had many srevices from dealership and other auto mechanic stores but it didn't improved. I had no choice but to keep driving the card on XXX th the engine crashed with out any sign on dashboard. There was slight noise and it increase by the way car was parked on the side road from Highway. The car was towed to my local mechanic and confirmed that engine is crashed. After i had to towed to dealership and i am still waiting for their response. Now we have put 43,000 miles in 6 years (91,000) total mileage. I had bought the waranty from dealership by $ 2500 which expired in 2025 Currently no warranty. My question here is that the car is still under 100,000 and engine failed. What if the dealership refuse to replace the engine. What are my leagal rights. Thanks [XXX] [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 19, 2026 · Engine, Fuel system · WA

I am submitting a complaint regarding a turbocharger failure on my 2017 Hyundai Santa Fe VIN [XXX] . The vehicle experienced turbocharger-related failure symptoms including loss of power and drivability concerns. This created a potentially dangerous situation because the vehicle was unable to accelerate normally and could have caused difficulty merging into traffic or maintaining safe roadway speeds. I contacted Hyundai Motor America requesting assistance with repair coverage. Hyundai denied assistance solely because the vehicle was outside the warranty period by time and mileage, despite the seriousness of the failure. I am concerned this issue may be related to broader engine or oil-related defects reported in Hyundai vehicles, including possible oil starvation, excessive oil consumption, or internal engine contamination that could contribute to turbocharger damage or failure. I believe this condition may represent a safety-related defect because sudden power loss during operation increases the risk of a crash. I request that the federal safety agency review this issue and investigate whether similar turbocharger or related engine failures are occurring in 2017 Hyundai Santa Fe vehicles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 11, 2026 · Fuel system · TX

After conducting Hyundai Service Campaign 9C2 for an emission update, vehicle now lunges and lags when accelerator is depressed. Symptoms tend to be more present soon after vehicle is started and reappear less often after the vehicle engine is at optimal temperature. This problem was not at all present prior to the service campaign update. The vehicle had no warning lights prior to the service update. This problem causes a safety issue when acceleration is not consistently present in a time of lane merging and turning onto higher speed roads. There are no warning lamps on the vehicle currently. Hyundai customer service was contacted about problem and I requested to remove the campaign update as this safety problem was not present prior to the update. Hyundai would not attempt to do this and required me to pay a diagnostic fee of several hundred dollar to troubleshoot the source of the problem. I declined.

Filed May 2, 2026 · Engine, Fuel system · IN

My vehicle had oil consumption problems that were fixed with a new replacement engine now my catalytic converter is going bad due to engine oil consumption problems and the dealer I deal with is refusing to help with this issue. There is only around 50k miles on the new engine. I would greatly appreciate your help with this Thank you!

Filed Mar 28, 2026 · Engine, Fuel system · OH

I purchase the 2017 Santa Fe Sport in October of 2023 with just short of 80K miles. It was in great condition and had no issues. I have maintained it according to Hyundai specification and regular on schedule oil changes with recommended 5w-20 full synthetic. At approximately 100K miles, I experienced an oil pressure light on the dash, when checked, the engine was approximately 2 quarts low. From this point on, the engine started consuming oil at an increasing rate all while I maintained regular maintenance. First, 1 quart a month, or about 1200 to 1500 miles, then to 1 quart every 2 weeks or 800 miles. I maintained weekly checks on the oil level and on the evening of 3/24/2026, I had added a quart, bringing the level to the midway point between the high and low dipstick markings. On the afternoon of 3/24/26 while driving on the highway in heavy, but at speed limit, traffic on the highway, I experienced a loss of power and a check engine light. I was able to exit the highway but the car started to run very rough and unable to idle. Luckily, there was no traffic approaching when I turned off the exit and made a left into parking lot to shut off the vehicle. I will be having it towed to a dealership in the next few days for their analysis.