2020 Hyundai Santa Fe: check engine light

Filed Sep 23, 2026 · Engine · SC

At times the engine will freeze up, stall the car while driving, or the car will altogether turn off when at a stop sign or light, while the car is still on. I've had the oil changed before the mileage indicated expired because the engine light came on and I was told the car had no oil at all when I know the oil was just changed within a 3 months time frame.

Filed Sep 17, 2026 · Engine · 137,000 miles · TN

The contact owns a 2020 Hyundai Santa Fe. The contact stated that while driving approximately 55 MPH, the vehicle went into LIMP Mode and failed to properly accelerate, with the check engine warning light illuminated and flashing. The vehicle was later towed to the local mechanic, who was unable to determine the cause of the failure; however, engine oil was added to the engine. After retrieving the vehicle, the contact discovered that the engine oil level was low shortly after the engine oil was added. The contact stated that the vehicle was consuming an excessive amount of engine oil and the vehicle was taken back to the local mechanic. The mechanic confirmed that the engine oil level was low, and metal shavings were found in the engine oil. The vehicle was taken to the local dealer, and the contact was informed that an oil consumption test was needed. The cause of the failure was not yet determined. The failure mileage was 137,000.

Filed Sep 10, 2026 · Engine · IL

At approximately 122,000 miles, my 2020 Hyundai Santa Fe experienced a serious engine malfunction while I was driving on the highway. The check engine light suddenly illuminated and the vehicle began thrusting/jerking forward unexpectedly. We immediately took action to exit the highway and were able to get off the highway, but the engine died before we could fully stop the vehicle. This created a serious safety risk because the unexpected jerking and subsequent loss of engine power occurred while traveling at highway speeds and could have resulted in loss of control or a collision. The vehicle was towed to a local independent mechanic. After inspecting it, the mechanic stated that the engine needed to be replaced and recommended taking it to a Hyundai dealership because of the continuing issues associated with the Theta II engine. The vehicle was then towed to the Hyundai dealership. The Hyundai dealership inspected the vehicle and determined that cylinders 2 and 4 were not firing and recommended replacing the valve shaft. We requested a complete engine replacement. Hyundai initially offered a 50/50 split of the repair cost, but after we requested an engine replacement, Hyundai declined and instead offered a 70/30 cost split. There was also a previous documented concern regarding increased oil consumption, as noted in an earlier oil-consumption report. The vehicle has been inspected by both an independent mechanic and a Hyundai dealership. The vehicle and engine components are available for inspection upon request. No police or insurance inspection was performed, to my knowledge.

Filed Apr 21, 2026 · Engine · MI

We purchased a used 2020 Hyundai Santa Fe with approximately 105,000 miles. The vehicle has had regular routine maintenance and oil changes. Around 107,000 miles, the check engine light came on and the vehicle simultaneously started running rough. It was diagnosed with a failed valve on the #3 cylinder and now needs a total engine replacement. This issue also coincided with excess oil consumption. Despite having an oil change fewer than 2000 miles earlier, the oil was almost completely gone from the engine despite not having any leaks present. This goes well beyond normal wear and tear and is indicative of a defect/design flaw.

Filed Apr 16, 2026 · Engine · TX

Around Feb 15, 2026, at ~85,000 miles, the oil pressure warning light began illuminating at idle and extinguishing above idle speed. The vehicle had also been experiencing intermittent hard starts and occasional shuddering at idle — symptoms too subtle for a typical owner to connect to imminent engine failure. An independent mechanic performed a manual oil pressure test: 4 PSI (Hyundai minimum spec is 13 PSI). The authorized dealer confirmed 6 PSI and found metal shavings in the oil pan — the signature of connecting rod bearing wear documented in Theta II GDI engine failures. Dealer recommended full engine replacement ($8,500). Vehicle has been inoperable at the dealer since Feb 19, 2026. SAFETY CONCERN: At 4 PSI with metal debris in the oil system, this engine was at imminent risk of catastrophic seizure. I avoided highway driving after the warning appeared (max 50 mph, city streets only). Had the engine seized at highway speed, loss of power steering and brake vacuum assist would have created serious crash risk. The symptom profile — warning only at idle, clearing at speed, no knocking, no check engine light — is the pattern that puts less-vigilant drivers at risk of seizure at highway speed with no warning. KNOWN DEFECT: The 2.4L G4KJ Theta II GDI is identical to the engine subject to a $210M the federal safety agency civil penalty (2020), multiple recalls, and a ~$1.3B class action settlement extending lifetime warranties through MY 2019. The 2020 uses the same engine but was excluded. My failure mode is textbook Theta II. Hyundai Service Campaign 9C2 (ECU update for 2019-2020 Theta II, issued Nov 2025) was incomplete on this vehicle — I was never notified. Completed after the engine had already failed. Manufacturer denied coverage (Case #XXX). BBB AUTO LINE claim #XXX filed Apr 16, 2026. No crash. No injuries. No fire. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 23, 2026 · Electrical, Engine · PA

On the morning of February 20 2026 at around 6:35am. I was on my way to work when the engine light started flashing and the speed started to decrease. I was traveling on a major highway in heavy rain with a lot of traffic. I had to put on my hazard lights and quickly pull off the road. The code given is P1326 which has to do with the engine and wiring harness. I just purchased the vehicle on Jan. 17 2026. The Carfax stated no open recalls.

Filed Dec 26, 2025 · Fuel system · IL

I have a 2020 Hyundai Santa Fe, 2.0T. I recently experienced the following issues; gasoline fumes coming into the car at low speeds, difficulty starting the car when it is cold and hesitation when trying to accelerate quickly. The check engine light came on and the dealer diagnosed a faulty fuel pump and high pressure hoses......on a car with only 49100 miles! The repair cars are estimated at over $1800. This is totally unacceptable and there should be a manufacturer issued recall on the car where Hyundai covers the cost of the repairs.

Filed Nov 13, 2025 · Engine, Fuel system · 72,700 miles · NY

The contact owns a 2020 Hyundai Santa Fe. The contact stated that while driving approximately 40 MPH, the vehicle started shaking and lost power. The check engine warning light was illuminated. The vehicle was restarted immediately. The vehicle was taken to a dealer, where it was diagnosed and determined that the engine had an air leak with the fuel. The contact added that the leak was stopped after an undisclosed repair, but the failure reoccurred a day later. The vehicle was taken to the same dealer however, the failure could not be duplicated. The vehicle was then taken to the same dealer and was diagnosed and determined that the throttle body needed to be replaced. The vehicle was repaired, but the failure reoccurred two days later. The manufacturer was notified of the failure. The failure mileage was approximately 72,700.

Filed Nov 10, 2025 · Engine · OH

While driving the oil light started flashing then the check engine light started flashing with no prior warning. The car was checked, it had burnt up the oil in it and then I put 3 quarts in it. It was 200 miles from needing an oil change. The engine had little to no power once oil was put in it. It died on the side of a highway. It had to be towed to a mechanic. There was no prior warning to this incident that the oil was low. This car put me and my child at risk of car accidents when on the road trying to get home with traffic behind me because the car wouldn't accelerate. I called Hyundai and they said they wouldn't help with no recall or extended warranty on the car.

Filed Oct 1, 2025 · Engine, Transmission · 98,000 miles · CO

The contact owns a 2020 Hyundai Santa Fe. The contact stated that while driving at 45 MPH, the check engine warning light illuminated. After scanning the vehicle, the contact received a code for torque converter damage. The vehicle was taken to the local dealer, where it was diagnosed, and the TCM update was needed. The vehicle was repaired, but the failure recurred. The vehicle was taken back to the local dealer, where it was diagnosed with transmission failure. The vehicle was repaired, but the failure persisted. The oil light was illuminated and then turned off. The contact became aware that the engine oil was 4 1/2 quarts low, and it was determined there was an oil consumption issue with the engine. The vehicle was taken back to the local dealer, where it was determined that the transmission needed to be replaced. The vehicle was not repaired. The manufacturer was contacted, and a complaint was filed. The failure mileage was approximately 98,000.

Filed Sep 21, 2025 · Engine, Fuel system · DC

Maintenance has been maintained on this SUV. SUV has about 20,000 miles. While at a complete stop at stop light, the SUV jerked a few times and when attempting to drive the accelerator pedal the SUV would not respond. I then put in park then back in drive slow acceleration, was able to pull over. After turning SUV off and waiting a few minutes , turned SUV back on engine light is on. Home is 10min. away, engine light is on and acceleration sucks. By time I park the engine light is off. Wait 2 hrs. drive around the block no light acceleration is off. Dealership is not helpful no engine lights can 0914not tell what is wrong with SUV. Its has been a week no engine light but acceleration still fill off.

Filed Aug 18, 2025 · Engine · TN

I am having to get an oil change every month for the past 6 months. My engine lights comes on every now and then, and my oil lights comes on every month. Something is wrong with the 2020 hyundai santa fe's and the complaints are being ignored. I have never missed maintenace on my car since I purchased it in 2020 brand new. Even the places I have taken my car to get my oil changes said they have heard of the same issues with others that have the same year and make of car. I spends at least 45-55 dollars a month just for oil changes and sometimes 16.00 in between the changes because the light will come on before it's time for the monthly change. Please help!!!