2019 Hyundai Santa Fe fuel system problems

Filed Nov 2, 2026 · Engine, Fuel system · MO

2019 Hyundai Santa Fe, XXX oil light came on but it wasn't time for my next oil change. I stopped by Advanced Auto to get code read, was told Camshaft sensor error. A week later, had my mechanic check code before doing oil change. He got the same code and ordered and replaced camshaft along with doing oil change. Drove two miles away from mechanic, oil and engine light came on. A week later I left my car with mechanic to check and replace oil sensor. The oil light was still on and he told me to take the car to the dealer because the engine is probably bad. Took car to the dealer, told them of all the previous work I just had done and asked them to check for any recalls or campaigns. Two recall/campaigns were updates, 9C2 and P33. Was told I needed Oil Flow Control valve Exh, got that replaced but lights were still on. Next, I was told I needed an Oil Pressure Switch, got that replaced, lights were still on. Dealer wants to do exploratory search to see if they can find out why lights are on but tell me I will have to pay for everything as they replace parts. What? I just paid them $1224.67 and nothing's fixed, lights are still on. Spoke with svc rep, [XXX] over the phone, she told me the engine light is still on and the oil light goes off during acceleration, I picked up my car as I can't keep getting nickeled and dimed after every part is replaced with no correction to the issue I came in for. Now the car runs like shit and burning gas like crazy. Engine is making sounds and acceleration is loud and slow. I believe this engine is going out and needs to be recalled as well. So many Santa Fe's are having this same issue and at 44,000 miles, I shouldn't be having any problems with this car. How is this allowed from the manufacturer? These engines are going to stop working, hopefully not while anyone is driving. Hyundai should be made to fix this asap. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Sep 21, 2026 · Engine, Fuel system · HI

The vehicle experienced a sudden, intermittent engine stall while driving, specifically when slowing down or coasting to a stop in live traffic. When the engine dies, the vehicle immediately loses engine power, power steering, and power braking assist, creating an extreme safety hazard. After stalling, the vehicle refuses to restart for several minutes. An authorized Hyundai dealership previously replaced the high-pressure fuel pump under warranty to address this issue, but the dangerous stalling has persisted over the last 2,000 miles. The vehicle continues to randomly shut off without throwing a permanent check engine light or diagnostic trouble code, and the manufacturer has failed to correct this critical safety defect.

Filed Sep 7, 2026 · Fuel system · NY

My vehicle had a very strong gas smell inside and outside of the car. I found a gas puddle under the car coming from the back of the vehicle. Car was hesitating when I stepped on the gas. I was afraid it may stall. I drove the vehicle to my regular service station. Vehicle has an active fuel leak and this is a fire hazard. I was very concerned whether the vehicle would stall and cause an accident. Warranty coverage was denied.

Filed Sep 2, 2026 · Engine, Fuel system · VA

Update Re: ODI Complaint Number: 11759237 Subsequent Actions and Manufacturer Refusal to Remediate Safety Defect: ​Following the [XXX], acute safety incident—where the vehicle lost motive power and entered severe limp mode on [XXX] immediately upon release from Sheehy Hyundai of Chantilly—the vehicle remained in dealer custody for 11 days (August 20–August 31, 2026). ​Failure to Diagnose Core Defect: Despite recurring total power loss, active diagnostic trouble code P00AF00 (Turbocharger Boost Control Module Performance), and four consecutive turbocharger destructions within 20,000 miles, the authorized dealership refused to conduct internal engine diagnostics, drop the oil pan, inspect the oil filter, or perform borescope checks. ​Physical Contamination Documented: On August 29, 2026, an on-site physical inspection confirmed sparkling metallic particulate suspended in the engine oil on the dipstick and substantial oil blow-by/intrusion into the turbocharger air intake line. ​Formal Denial of Safety/Warranty Coverage: On August 31, 2026, dealership management and Hyundai Motor America (Consumer Affairs Case #[XXX]) formally denied warranty assistance and refused engine teardown under the Theta II Lifetime Engine Warranty Settlement. Coverage was declined citing "outside influence" due to an aftermarket turbocharger assembly, while Hyundai refused to investigate the underlying engine failure contaminating and destroying the forced-induction system. ​Evidence Preservation: On August 31, 2026, the vehicle was towed to an independent facility to mitigate road hazards, conduct teardown diagnostics, and preserve the engine oil/filter for ISO-accredited spectrographic laboratory analysis. ​The manufacturer released an unsafe vehicle into traffic on August 20, 2026, and subsequently refused to investigate or remedy a documented internal engine failure that creates sudden, recurring loss of motive power. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 28, 2026 · Engine, Fuel system · WI

My vehicle recently received the Hyundai 9c2 emissions upgrade they required and since then the vehicle has had predictable acceleration issues for the first several minutes after the vehicle. While trying to slowly accelerate the vehicle with unpredictably lurch forward. Many people have been reporting this.

Filed Aug 24, 2026 · Engine, Fuel system · VA

The vehicle suffers from recurring, sudden loss of motive power and transitions into engine "limp mode" while driving in active, heavy traffic. This severe drivability defect has occurred on four separate occasions under Diagnostic Trouble Code (DTC) P00AF00 (Turbocharger/Supercharger Boost Control "A" Module Performance) and related boost/MAP faults (P0234). During these episodes, the vehicle abruptly loses acceleration capability without warning, creating an acute collision risk when navigating highway traffic and intersections. The turbocharger assembly has required replacement three separate times due to recurring oil contamination from the engine crankcase. Despite meticulous maintenance (documented synthetic oil changes every 3,000–5,000 miles since new), the manufacturer and dealership have repeatedly blamed peripheral turbo components rather than diagnosing or repairing the root cause (I suspect excessive engine crankcase pressure/piston ring blow-by based on the significant oil deposition on the turbo, map sensor, and pooling in the intake line).

Filed Jul 12, 2026 · Engine, Fuel system · GA

COMPLAINT SUMMARY: [XXX] / ENGINE THERMAL FIRE RISK / WARRANTY DECEPTION My 2019 Hyundai Santa Fe (2.4L GDI Engine) is experiencing severe powertrain degradation under the known Theta II engine defect class-action framework. On November 7, 2025, the vehicle logged a Permanent Diagnostic Trouble Code (DTC) P1326 via an independent scan, indicating catastrophic internal rod bearing wear. On XXX, the vehicle was brought to Hyundai of Milledgeville for safety recall verification. Instead of executing the mandatory corporate-directed Bearing Clearance Test (BCT) to replace the failing engine block, the service department committed technical campaign malpractice. The technician forced the 9C2 ECU Software Update directly over the locked mechanical fault to suppress the dashboard warning lights and alter the vehicle's ROM ID parameter limits. When caught via a photograph of their active GDS diagnostic tablet showing 7 historical system faults, the service manager provided a truncated printed report hiding Page 1 and omitting the critical P1326 powertrain code count to evade a warranty engine replacement. Due to these unmitigated delays, the vehicle has suffered severe consequential safety damage. The advanced engine degradation and oil consumption have flooded the exhaust system, melting the catalytic converter substrate and triggering a new DTC P042000 (Catalyst Efficiency) fault immediately after the dealer visit. The extreme engine vibrations have also damaged the transmission's torque converter clutch (DTC P074100). The dealership refused a service loaner and knowingly sent a disabled consumer and an elderly passenger away in an active, failing vehicle that presents a sudden stall-on-highway hazard and a severe thermal exhaust fire risk under extreme summer heat conditions. Hyundai Motor America Corporate has failed to provide emergency towing or alternative mobility accommodations despite a registered corporate case file. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(

Filed Jun 5, 2026 · Engine, Fuel system · MD

On March 04, 2026, I took my 2019 Hyundai Santa Fe to the local dealer for oil change service. As part of that service visit, they performed Hyundai recall 9C1 which was supposed to lower tailpipe emissions. The next morning, and ever since, my vehicle ran differently. The engine had several 1000rpm surges and was sluggish at other times. This behavior has continued. Particularly when I first start out in the morning and the engine is cold. Never after the engine is warmed up. A visit to the Hyundai forum shows a growing list of other Hyundai owners who are experiencing the same issues. This recall is defective and should be corrected.

Filed Jan 22, 2026 · Engine, Fuel system · MD

My Hyundai Santa Fe 2019 Limited is burning oil. It started after the Turbo broke in October 2024. The turbo began leaking oil and then died. I took it to the dealership as it is still under warranty and they replaced the turbo. As a result, I have had issues ever since and now my car burns oil at a fast rate. In between oil changes I need to put oil in the engine to avoid it being drained. I am able to go about 3k miles on Synthetic oil and by 2.5-3k it is almost empty. It has been doing this now since 2024. I just had my 90k mile check up complete and with that I got an oil change. This was done in November 2024. Syntehtic oil was used. On January 16, as I was driving my car mileage decreased, the car began to shake and the engine light came on. I was able to safely stop and have the car towed. It was found that after driving just 2k miles the oil had completely burned off. I currently have an appointment at the dealer for them to run diagnostics on why it is burning. I saw there was a class action lawsuit against other Hyundai's doing the same thing and as a result Hyundai has to replace the engine. I also have read numerous forums where everyone is reporting the same thing with this particular model of it burning oil. I wanted to report this in case there were other owners of the same car experiencing the same thing.

Filed Apr 7, 2020 · Electrical, Fuel system · 11,300 miles · FL

I have had issues with this vehicle since very shortly after purchase in june 2019. I have been without my vehicle three times due to service/warranty related issues - twice in a rental, and now the third time I am using a friend's vehicle. My complaints began with a "hard start" and a delayed turnover of the engine. The vehicle behaves as though it wants to stall out. Hyundai told me for months that they couldn't recreate the problem to fix it even though it happened 2-3 times minimum per week. Then the other things started going wrong...here is a short list for you over multiple visits and phone calls to the dealership: -hard start - vehicle jerks forward upon engine start -delayed turnover - feels like it is going to stall -vehicle engine ticking upon start -most recently, vehicle engine loudly knocking upon start -vehicle auto collision sensors malfunctioned and almost caused an accident on a busy 4 lane highway by causing my brakes to slam to an almost stop because the car in a lane next to me was turning (I was going 60mph at the time with no risk of collision). -apple car play malfunctions - sounds like wires are crossed (using apple charger and generic charger) -rear view camera stays on for 10-15 minutes at a time to the point that I have to turn off and restart the vehicle -while going 25-40 MPH, at times, the vehicle will create a noticeable front end jerking motion -while the flight recorder was in me vehicle, it went off on an emergency alarm for over 3 hours and hyundai's service team couldn't determine a problem -the gas cap door will not open or close properly -vehicle, on 5 occassions, would not respond to depression of gas pedal there are other smaller issues that I have expressed my concern over, and I no longer feel safe in this vehicle with my two small children have now been without vehicle for 30+ cumulative days