2021 Hyundai Tucson: check engine light

Filed Jul 18, 2026 · Engine · CO

I was driving down [XXX] from my house.My engine light started to flash.I tried to accelerate my car barely went 10 miles an hour.I got Home 2 minutes later.There was major knocking.I had the car towed to [XXX], Hyundai, the only code that is showing up on the diagnostics, is P1326 there is an open class action lawsuit for this exact code. For the rod bearing failure, Hyundai is denying the claim, saying there's a gap in maintenance history on a car. I didn't own yet when I bought the vehicle. It passed a 190 point inspection. There's no way there was anything wrong with this vehicle.I am under fifty thousand miles , and if I was on the highway , it could've been deadly i could not accelerate. No other lights were on in the vehicle, except for the flashing engine light.I have already reported to the better business bureau and they have sent it to arbitration. I have contacted the escalation department for Hyundai.They opened up to separate cases.The agent that was assigned to me didn't even get the code from [XXX], they just denied the claim without it.I have the emails to prove that I had to give it to her. I have.\n All my maintenance history, but as you can see from the text message from XXX Hyundai, they are requesting maintenance for a car that wasn't in my possession yet. They're asking for dates from a year before I had the car, I bought it through EchoPark. I have everyone on my side including fFdelity , as I tried to go through Fidelity and they said they couldn't approve the warranty because of the class action lawsuit against Hyundai for that exact manufacturer malfunction. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 10, 2026 · Engine · 44,807 miles · CO

The contact owns a 2021 Hyundai Tucson. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The check engine warning light was illuminated. The vehicle was driven to the shoulder of the road before being driven to the residence. The contact’s neighbor checked the oil level and informed the contact that the oil pan was empty. The oil level was topped off. The contact stated that the vehicle was not due for an oil change for another 200 miles. The vehicle was towed to the dealer where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The contact was informed that there was no oil in the oil pan. The contact was informed to provide the vehicle service records. The contact stated that the failure was a manufacturer's failure. The manufacturer was made aware of the failure, and two cases were filed. The failure mileage was approximately 44,807.

Filed Mar 23, 2026 · Engine · 89,000 miles · SC

The contact owns a 2021 Hyundai Tucson. The contact stated that while driving at various speeds, the check engine warning light was frequently illuminated on the instrument panel. The contact had taken the vehicle to various independent mechanics and was informed that the engine was consuming an excessive amount of engine oil. The contact had taken the vehicle to a dealer for service, and upon inspection, the contact was informed that the engine needed to be replaced. The contact was provided with an estimate for the engine replacement. The manufacturer was notified of the failure but offered no assistance. The contact was initially informed that the vehicle was covered under warranty; however, the contact was later informed that there was no warranty on the vehicle. The vehicle was not yet repaired. The failure mileage was approximately 89,000.

Filed Mar 13, 2026 · Engine · CA

While driving on the freeway, my 2021 Hyundai Tucson SE (72,021 miles) suddenly and without warning lost power and entered limp mode. I was able to safely maneuver to the shoulder and exit the freeway. The check engine light came on and is currently flashing. I took the vehicle to AutoZone where code P1326 was retrieved. I then took it to Pep Boys for a full diagnostic where P1326 was the only code present. The Pep Boys report states the vehicle requires immediate attention. The vehicle remains in limp mode and the check engine light is flashing. The vehicle is not being driven as it cannot safely reach freeway speeds. I contacted Hyundai Customer Care and was assigned Case # XXX. I also contacted a Hyundai dealership who attempted to charge a $225 diagnostic fee despite P1326 being a known Hyundai defect covered under recall/service campaign. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 9, 2026 · Engine · MA

I am the original owner of this car and in June 2025 I brought my car to Hyundai from noises and they told me it had no oil despite me being up to date with oil changes on the vehicle. They told me they were going to do an oil consumption test and once they did that the engine was denied. 6 months later 3 days after an oil change and no check engine light on, the engine fails while I’m on the side of the highway. This car is not safe. Check engine light was not on and I am always up to date with my cars maintenance.

Filed Nov 14, 2025 · Engine · NJ

We were driving and the engine light started flashing and buckling. The vehicle had been properly maintained with oil changes. We have oil changes receipts from our mechanic. Hyundai refuses to cover it under their warranty even though there are documented issues with the make and models of 2021 Hyundai Tuscons.

Filed Nov 4, 2025 · Engine · FL

Engine started making a knocking sound, then the oil light came on followed by the check engine light. Accelerates and decelerates on its own. Was forced to immediately pull over across three lanes on Interstate 95. It’s been over two weeks and I’ve yet to hear if Hyundai is going to cover a replacement engine. However, what happened is exactly what they have listed on their website ⬇️ What to look out for check-engine Check Engine oil-light Engine Oil Pressure A knocking noise from the engine that increases in frequency as the engine rpm increases. Reduced power and/or hesitation and vibration. Illumination of the “check engine” light in the instrument cluster. Illumination of the “engine oil pressure” warning lamp.

Filed Nov 3, 2025 · Engine · TX

My family’s safety is at serious risk with my 2021 Hyundai Tucson, which I’ve owned only 55 days. This vehicle has stalled three times while driving, putting me and my two young children in immediate danger. Each time, the car operated normally until a flashing engine light appeared, RPMs spiked, and the vehicle suddenly lost all power—entering “limp mode” and unable to exceed 3,000 RPM or 50 MPH. The first failure occurred 9/14/25 while merging onto the interstate, forcing me to lose power mid-acceleration as surrounding vehicles slammed their brakes to avoid collision. 13 days later, it happened again in stop-and-go traffic, leaving me stranded on the shoulder. Both incidents occurred without warning or prior check-engine lights. The third—and most terrifying—incident was on October 17, 2025, when the engine completely died 300 miles from home on a busy highway. My children, ages 4 and 6, were terrified as cars sped by. We were extremely fortunate not to have been hit. I am urgently requesting assistance for the immediate replacement of this vehicle’s engine. It is covered by Hyundai’s 15-year/150,000-mile extended warranty, clear evidence the company was aware of these issues. Service records from the previous owner-that I was told about by Hyundai show ongoing engine problems and recalls since 2022 further proof this vehicle should have been retired from service As a parent, I’m very alarmed that Hyundai refuses to act until “catastrophic damage” occurs. This policy is irresponsible and endangers entire families. There’s at least 50 the federal safety agency complaints describing identical issues; stalling, power loss, and bearing failure linked to defective connecting rod bearings. Yet, Hyundai has denied a replacement, insisting on waiting for further damage and failures in operation. I beg you to intervene and prioritize my family’s safety before tragedy inevitably strikes. My children should not be put at risk due to corporate negligence, greed and absence of accountability.

Filed Sep 13, 2025 · Acceleration, Engine · CA

While driving on a major highway, my car went into limp mode topping out at 60 mph then decreasing before going back to 60. My check engine light was also blinking, not solid.

Filed Jul 15, 2025 · Engine · NC

There was a recall on this engine which I had updated the knock sensor campaign. While on the highway the engine light started flashing and the speed was reduced to 20 mph on a major highway. I had to almost cause a wreck to get off highway. The vehicle went into limp mode with no prior indication

Filed Jan 17, 2025 · Engine · GA

Around November 1, 2024 my 2021 Tucson check engine light came on. I had this checked out and was told by a mechanic that it was the Camshaft Sensor. I had this repaired and then on November 23rd while traveling to Ohio my Check Engine light started flashing and needed immediate attention. I was on the West Virginia Turnpike when this happened and it caused the car to go no more that 45 mph in a zone marked 65mph. We got this immediately checked out and repaired and then 4 days later the same thing happened while in Ohio. It was taken to Deihl Hyundai in Massillon, Ohio and they once again made this repair with video evidence of said repairs. Once again while driving at freeway speed on December 23rd my car experienced this malfunction. The same dealership fixed it once again with direction from Hyundai. I am concerned for this is an ongoing problem and could cause serious injury to myself or others in my vehicle if this would happen once again on a freeway.

Filed Nov 26, 2024 · Engine · 60,000 miles · NC

The contact owns a 2021 Hyundai Tucson. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed, but the vehicle failed to accelerate as intended. The check engine warning light was illuminated. The contact stated that the vehicle failed to exceed 20 MPH. The contact stated that the failure had occurred while driving on a busy highway. The contact safely pulled over to the shoulder of the roadway. The vehicle was then towed to the dealer, where it was diagnosed with engine knock sensor failure. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was made aware of the failure and a case was opened. The manufacturer informed the contact that the repair was not covered under an unknown recall due to a lack of maintenance records. The contact was advised to contact the Better Business Bureau. The failure mileage was approximately 60,000.