2022 Hyundai Santa Fe: misfire or rough idle

Filed Feb 16, 2026 · Fuel system · FL

In November 2025, my 2022 Hyundai Santa Fe began to hesitate when accelerating and would almost "jerk" when I pressed the gas pedal. Soon after my check engine light came on and I made an appt to take it for the closest Hyundai dealership (as it's still under warranty 33k miles) Upon running a check the dealership notified me that Fuel Injector 1 has misfired and will be replaced. I receive my vehicle back and not even 100 miles later my check engine light in on again and the same issues are arising. Back to the dealership to see now Fuel Injector 3 has misfired and there is an open TSB showing all 4 Fuel Injectors need replaced. My vehicle was finally returned to me in January 2026. It is now February 16, 2026 and my check engine light in on YET AGAIN. I've been given the run around from Hyundai Corp about fixing this vehicle. Why is this acceptable treatment when a vehicle is under warranty ?

Filed Aug 18, 2025 · Fuel system · IA

While traveling out of state, my 2022 Hyundai Santa Fe (2.5L) experienced a sudden loss of power and rough running during acceleration to pass; check engine light came on. Independent shop pulled code P0302 (cylinder 2 misfire). Vehicle became unsafe to drive and was left at a Hyundai dealer in Indiana. I later learned Hyundai issued TSB 25-FL-001H (Jan 2025) for 2.5L GDI injector internal filter breakage that causes misfires and directs replacing all four injectors. Parts were quoted up to three weeks on backorder. This sudden power loss during highway passing presents a safety risk (inability to accelerate/merge). Vehicle is under 60,000 miles.

Filed Mar 18, 2024 · Engine, Fuel system · GA

[XXX] Driving down road car began shaking, driving rough and wouldn't pick up speed. Check engine light came on with code P030400/POWERTRAIN/EMS/Odometer 46,056. Car towed to Hyundai in Gainesville, GA. Tech found Cylinder 4 misfire and Cylinder 4 was replaced. [XXX] Driving down Highway and car began shaking, driving rough and wouldn't pick up speed ,again. Check engine light with code P030300/POWERTRAIN/EMS/Odometer 47,176. Car driven to Hyundai in Gainesville, GA. Tech found Cylinder 3 misfire and Cylinder 3 was replaced. [XXX] Driving down highway and check engine light came on. Car was running okay. Code P219CFO/POWERTRAIN/EMS/Odometer 47,315. Car was driven to Hyundai in Gainesville, GA for diagnosis. Tech found Cylinder 1 Air-fuel ration imbalance, [XXX] internal GDI injector leakage and parts were ordered. Replaced 2 fuel injectors, high pressure fuel pipe and 2 rail bolts. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Nov 30, 2023 · Engine · CA

On 10/31 I loss power while on the freeway for the 2nd time since August. The car was assessed and fixed according to the dealership. My car threw a 2nd code which was cleared and not fixed due to not showing issues according to the dealership. I got my car back in mid November. I immediately complained that I still had a rough idle and was told my car was fine by the manager via service rep. On 11/28 my car loss power on the freeway again for the 3rd time since August. According to the codes, all my cylinders are failing one by one. This is a huge safety concern. The dealership could care less.

Filed Oct 24, 2023 · Engine · VA

The issue with Hyundai 2.5 L turbocharged engines is getting a lot of exposure on-line. My story begins about a year ago with me complaining to the Hyundai service department about my 2022 Santa Fe Limited hesitating, lurching, and stalling (once) following acceleration from a complete stop, all without the Check Engine Light (CEL) illuminating (which the dealership said is needed to initiate troubleshooting). In addition, there is a common thread where dealerships are telling owners that it is "... probably bad gas." On 2 October 2023 the SUV started and was idling very rough, and as I drove off, the CEL illuminated (finally). After turning off the SUV for five minutes, it started fine with no CEL. My OBD-II code reader pulled three codes from the SUV that afternoon: P0300, P0301, and P0302 (Misfire - General, Misfire - Cylinder 1, and Misfire - Cylinder 2). The trouble codes should be sufficient for the service department to locate a problem, and to their credit I was placed in a loaner vehicle when I dropped the SUV off on 7 October 2023. So far (24 October), they have not identified a problem, even though there is a fuel injector Technical Service Bulletin (TSB) for multiple Hyundai vehicles (including my Make/Model/Year) that may or may not apply to my specific vehicle. Bottom line: The vehicle is unsafe to drive (as I told the service manager), has had this problem for approximately one year, and if the vehicle stalls when I am entering traffic it is not going to end well - not for me in a stalled vehicle and not for Hyundai after they had an opportunity to address the problem.

Filed Oct 11, 2023 · Engine, Fuel system · WV

Vehicle check engine light came On while driving and vehicle began misfiring. Vehicle was in the shop and injector was found defective. Vehicle again had same issue but intermittently and wife would have to pull over and shut down the car to be able to drive it safely home. Dealership tried blaming bad gas which was purchased a mile from dealership. Within 50 miles vehicle began acting the exact same way and Hyundai dealership says injector needs replaced but blaming contamination not a known issue Hyundai has with injectors. Found multiple instances of same issue and same made up issue of contaminated gasoline even at the same dealership I went to. Faulty injectors make the vehicle unsafe when traveling at highway speeds on busy highways.

Filed Mar 22, 2023 · Engine · AL

My vehicle has been having intermittent cylinder misfires for about 4-5 months now. Initially, before I knew this was the issue, I didn't think much of it because the shaking that would occur was mild, but as it gradually worsened I knew there was a bigger issue. I will start my car, the check engine light will be on, and the car will shake very hard with acceleration throughout the entire drive. I know that it is a cylinder misfire because I will get an alert on MyHyundai app telling me that a DTC code has been detected, this is the code, "DTC P030100" (the servicing department confirmed this was the misfire code). I have come to learn that the car usually only populates the code when the issue occurs for consecutive trips. As this is an intermittent issue, there are times when I know that the car is misfiring during the drive (it is obvious), but I will not be sent a DTC notification. I have taken my car to the dealership 3 times for this issue with documented DTC codes for each visit. Upon my initial visit to get this seen about, my local Hyundai dealership changed the spark plugs and coil packs in an attempt to fix the issue (although the spark plugs should not usually need replacing at 20,000 miles). It was about 2 days until it started misfiring again. Since then, I have taken it back to the dealership twice because of this unresolved issue, but if the cylinders are not misfiring the day I take it, the issue is dismissed. I truly do not think they know or care to investigate the matter further. I have taken it to the dealership 3 times within the last 3 weeks regarding this issue. I have to imagine this is a safety issue as it can increase the chance of engine failure. Today was the 3rd visit, I picked it up and as I was told, "we saw the DTC code, but the cylinder was not misfiring when we looked at it, so we drove it around a good bit and no issues so the code was cleared".