2012 Hyundai Accent: check engine light

Filed May 28, 2026 · Engine · VA

While traveling at highway speeds on [XXX] with three passengers, the vehicle suddenly suffered a catastrophic internal engine failure (severe rod knock), forcing an emergency deceleration in active traffic that put all occupants at risk of a rear-end collision. The sudden breakdown was immediately preceded by a flashing Check Engine Light and violent metallic knocking, despite the vehicle being regularly serviced and having a Knock Sensor Detection System (KSDS) software update completed just one month prior at Motor Mile Hyundai in Christiansburg. The catastrophic failure and the immediate need for a complete engine replacement have since been confirmed verbally by the Hyundai service center. Actual milage on engine is approx. 145000 (Because of replaced instrument cluster by previous owner it shows approx. 195000) INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jan 3, 2025 · Body, Electrical · GA

The contact owns a 2012 Hyundai Accent. The contact stated while driving at an undisclosed speed, the rear driver's side tire suddenly became flat. There was an abnormal sound coming from the infotainment system and the vehicle was shuddering. The contact stated that the front driver's side and the rear passenger's side windows were stuck and had to be manually raised. The check engine, air bag, and low tire pressure warning lights were illuminated. The vehicle was taken to a dealer however, the vehicle was not diagnosed. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

Filed Aug 14, 2024 · Brakes, Engine · MA

The contact owns a 2012 Hyundai Accent. The contact stated while driving approximately 35 MPH, the check engine warning light illuminated. The vehicle was driven to a dealer to be diagnosed. The contact was informed that the catalytic converter needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was driven to the dealer to be diagnosed. The contact was informed that gasoline was leaking from the fuel pump, and the fuel cap needed to be replaced. The vehicle was repaired; however, the failure recurred. The vehicle was driven to the dealer another time and was diagnosed, and it was determined that the exhaust pipes needed to be replaced. The vehicle was repaired; however, the failure recurred. The manufacturer was not made aware of the failure. The contact researched and determined that the failure was due to the federal safety agency Campaign Number: 23V651000 (Service Brakes, Hydraulic); however, the VIN was not included. The failure mileage was unknown.

Filed Oct 13, 2023 · Engine · NC

Purchased in January 2023 with 99k miles. Performed oil change on day 1. Checked fluid levels every 1500 miles, noticed oil was low, ( no smoking, no burning oil smell, no idea where oil was going?) began adding oil, and checking every 500 miles. Always about 1/4 quart low. Changed oil, and filter every 3000 miles. At approximately 119k, started hearing a small ticking sound, was told to use better gas, so began using premium gas. Didn't change the ticking. At 120k tick became a loud knock, after new oil/filter change (I changed oil early at approximately 1800 miles to try to alleviate tick. Decided to drive to mechanic shop when engine light came on and showed knock sensor code. I bought a knock sensor and replaced old one. Shop says rod bearing is causing to noise, and asked to see old oil which I keep in new oil containers.after I change, to dispose of at auto store. Bottom of oil containers was full of fine metal. Tell me the engine might have recall. However 2012 accent 1.6 gdi I not on recall, but 2012 veloster is, among others that use the same engine. I believe the recall on other vehicles is due to exactly what's happed to mine. Why is the 2012 accent gs not included in the recalls for engine replacement? I've emailed huyndia of America, and they say I am responsible for fixing the engine? I feel no amount of maintenance would have kept this from happening. I've thought maybe if check engine light had come on when ticking first started I could have taken car to dealer and that tick might not have became rod bearing clanking, and knocking? Please help to add 2012 accent to recall. Ive read many other stories describing the same problem. Thank you

Filed Dec 28, 2022 · Engine · UT

Loud ticking and engine knocking. Car starts to stall and overheat, car does not shift properly. Was told it was failing coils. Replaced all coils and spark plugs, this remedied the flashing ck engine light. Check engine light still on and still says the coil is not responding. Tech says it is a stuck lifter but can't be manually unstuck. Road hazard is car will stall and engine will fail without warning. Car has received regular oil change maintenance.

Filed Jul 2, 2022 · Brakes, Engine · NY

Car turns off while driving continuesly misfires even after replacing coils and spark plugs check engine light on and flashes car charger port keeps blowing fuses

Filed Nov 13, 2020 · Engine · 119,000 miles · FL

Tl* the contact owns a 2012 hyundai accent. The contact stated while driving 35 MPH, the vehicle stalled. The contact stated that after three attempts the vehicle restarted. The check engine warning light was illuminated. The contact stated that the check engine warning light remained illuminated. The vehicle was taken to doral hyundai (10285 nw 12th st, doral, fl 33172) to be diagnosed. The contact was informed that the fuel pump failed and needed to be replaced. The vehicle was repaired however, the failure recurred. The vehicle was not taken back to the dealer. The manufacturer was not made aware of the failure. The failure mileage was approximately 119,000.

Filed Sep 1, 2020 · Engine · 114,304 miles · FL

Tl* the contact owns a 2012 hyundai accent. The contact stated that the check engine warning light illuminated. The vehicle was taken to an independent mechanic to be diagnosed. The mechanic retrieved dtc code: p036. The contact was informed that the engine sensor stabilizer failed and needed to be replaced. The vehicle was not repaired. The vehicle was not taken to a dealer. The manufacturer was not made aware of the failure. The failure mileage was approximate 114,304.

Filed Jul 6, 2020 · Engine · 130,000 miles · WA

2012 hyundai accent 4dr sedan knocking in the engine compartment, engine light comes on and code is stored, the code is for knock sensor needing to be replaced...the true reason for this to put out code for knock sensor fauilare are that the connecting rod bearing is going out and that little bit of play between the rod and crank makes the knock sensor code come up it knocks moving or not this is a serious proublem the engine could have a serious engine failuare and at mid speed it can and will be life treating, fire, parts being thrown threw fire wall hitting occupants in car or outside it started the knocking at 130000 miles I am a mechanic of over 40 years

Filed Nov 15, 2019 · Engine, Suspension · 89,000 miles · MA

The engine light is blinking on the dashboard and making too much sound from the engine, took the car to mechanic he said problem with o2 sensors and catalyst system effieciency (p0420) code

Filed Aug 1, 2019 · Engine · 25,000 miles · CA

Tl* the contact owns a 2012 hyundai accent. While the vehicle was stopped, the contact heard knocking noises coming from the engine compartment. Once the vehicle accelerated, the contact heard a ticking noise in the engine and the check engine warning indicator illuminated intermittently. The vehicle was not diagnosed or repaired. The dealer and manufacturer were not notified. The failure mileage was 25,000.

Filed Jul 25, 2019 · Acceleration, Engine · 92,500 miles · DC

Driving on the highway I heard a knocking in the engine. The check engine light came on. I took the vehicle to get the light checked for a code and was told the knock sensor needed replacing. Took the car to the dealer I purchased it from and dealer said there was no code and no history of a code so they could do nothing about it after I told them how to replicate the knocking. Dealer released the car. Two days later while driving on the highway the light came back on and the engine continued knocking. I took it straight to the dealer again and they were able to replicate the issue and find a code. The dealer contacted the manufacturer about the code and the manufacturer recommended applying a patch to the knock sensor and, according to the dealer "see what happens". The dealer performed the patch and released the vehicle to me. The very next day I was driving home after work on the highway and the odometer went from 3000rpm's to 0. While I could try to engage the accelerator and could hear the engine rev no rpms registered. The vehicle went into an idle state and would not react. Causing many near accidents I was able to get the car to the shoulder before it became stationary. Attempted to restart car a dozen times and the RPM's would not register still.car has now been with the dealer who has not been able to replicate the issue and has not reached out to the manufacturer. The cause and effect of an issue happening after applying a computer patch is not being investigated nor discussed with the manufacturer.