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Problems with 2012 Hyundai Sonata Hybrid ENGINE

On average, the 2012 Hyundai Sonata Hybrid starts to “feel” problems with the ENGINE and its various aspects after 84 930 miles.

Recently reported ENGINE problems on 2012 Hyundai Sonata Hybrid

While driving the car on the freeway, it will jerk forward and then shortly after lose power. the car shows the battery as being barely charged. i pull over (luckily haven't been killed yet) on the side of the freeway. let the car sit for a few minutes, restart it and the battery is half full and the car is driveable. i've read online that this is a common issue with 2012 hyundai sonata hybrids. i've taken my car to a hyundai dealership twice, and they can't find anything wrong, diagnostics show its fine. the second time i took it in they replaced the battery located in my trunk for $485. that did nothing, as the car is still randomly shutting off, and most times in the most dangerous areas of the road. i don't think hyundai will do anything about this until numerous people are killed. forgot to mention that sometimes when it shuts down the check oil light comes on. i've had the oil replaced and the oil sensor, so thats not the issue.

Warning check charging system do not drive stop safety issue

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving, the transmission failed and the vehicle stalled without warning. the vehicle was towed to bob brady hyundai (4025 e boy rd, decatur, il 62526, (217) 876-3800) where it was diagnosed that the transmission needed to be replaced. the vehicle was not repaired. the contact stated that the vehicle was taken approximately seven times to the same dealer, but the cause of the failure could not be determined. the contact stated that the dealer previously replaced the electrical component and the engine. the manufacturer was not made aware of the failure. the failure mileage was approximately 150,000. *dt *tp

Engine failed me while driving at the rate of speed 65 miles per hour on highway 20 returning from my myrtle beach vacation with me children and girlfriend with. we could have been killed the car just started decelerating as i was trying to pass another car. i had to think quick as there where semi tractors behind me i threw on my hazards and was able to give signal that i was in distress allowing other travelers to take heed. i then started moving into the left lane so that i could exit the highway the car at this point was just coasting and coasted into a gas station where i awaited road side towing. i have read several complaints here on nhtsa of similar incidents when will the consumers be protected against huge manufacturers we do all that were supposed to as far as maintaining our investment and then they try to stick the consumer with the bill in which they are will aware of had been manufactured with defects. i will never buy another hyundai product again in life and i will do everything in my power to make sure no one i know does either. for them not do whats right by your customers will in the end cost them way more. my vehicle came with an extended warranty and they are also trying to get out of replacing the faulty engine either way consumers think there doing everything right maintenance and warranty and still some how the big guys get off the hook of honoring there end of the deal. its very disheartening to say the least. i have provide a very in depth letter to what work has been done on my vehicle and if you need to i am sure that all my maintenance records can be retrieved from carfax. please please advise on what other measures i can take

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving 65 mph, the vehicle stalled without warning and an alarm noise was coming from the instrument panel. the contact was able to coast the vehicle to the side of the road. the vehicle was towed to taylor hyundai (located at 3233 washington rd, aguata, ga 30907, (706) 868-1200) where it was diagnosed that the third rod in the engine needed to be replaced and caused the engine to seize. the contact stated that the vehicle still remained at the dealer. prior to the failure, the vehicle was taken to rick case hyundai (located at 3180 satellite blvd nw, duluth, ga 30096, (678) 321-1584) to be diagnosed, but the cause the failure could not be duplicated. the contact was informed that hybrids were supposed to operate in that manner. the vehicle was not repaired. the manufacturer was contacted and provided case number: 15688279. the approximate failure mileage was 104,000.

Engine fire, non collision. just driving down the highway. no warning lights came on until engine quit running. lost power and engine became extremely hot. had to tow to mechanic who said engine might have caught fire and i would need new engine.

Engine blew a rod spontaneously while on the freeway. going 75 miles an hour and heard a loud clicking sound that resulted in engine failure. no warning lights or indicators until after the engine seized. left us stranded and in danger. engine regularly maintained and no warning indicators or reason to have the car looked at prior to the event. towed back to mechanic where he explained the engine rod had blown and damaged the engine and would require a completely new engine as a result. it's a hybrid and does not fall under the recall as of now but it's the exact same situation as the non hybrid versions.i only found out from the mechanic that there has been a problem with 2012 hyundai sonata engines.

While driving the car will randomly rev very high it started about 3 weeka ago while driving at around an average of 45mph in city. it was initially just revving 3-4 times until i hit the break and it was isolated to one incident per drive. but last night after driving on i-25 at highway speed i turned to a slower busy street more stop and go traffic and the car started revving again only this time it did not stop after one incident. as soon as i hit the accelerator it went into a revving fit. and didnt stop i couldn't even drive it because i could not get it to accelerate. i tried turning off blue drive and tried shifting down to 1st gear so i could at least make it at 10-15mph but it revved up even in manual gear. i had to park it for the night in a pretty sketchy neighborhood and call an uber. the system didn't populate any codes and no service lights came on. then, this morning when i went back to get the car to a mechanic and it was accelerating fine though it was sluggish. i managed to make it 2.5 miles to a mechanic without incident but still no service engine light.

Suddenly gave warning while driving not drive hybrid system failure. please call me at [xxx] information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6). *tr

The car began lurching forward intermittently at highway speeds (65+ mph) when travelling in a straight line on a flat highway on day 1, after 30 minutes of driving. on day 2, the car failed to shift gears at low speeds (<40 mph) while decelerating downhill on a city street, after running normally for 30 minutes at highway speeds. it coasted slightly uphill in first gear to the destination on a city street, unable to accelerate from 5mph. it was towed ($88) to a mechanic where it failed a road test, and the transmission and clutch assembly were pronounced dead. a new transmission and clutch assembly were installed and the engine (odo 131,000+) failed to turn over. $650 in labor to diagnose and attempt repair/replacement. repairs were estimated at $8,100 and the kbb value was less than $3,200. the car is otherwise in excellent condition and is being sold to a junk yard with new tires under it.

While trying to accelerate at freeway speeds (50-60mph), the "eco guage" revs up but the car will not accelerate - slows down in the middle of traffic. the oil pressure warning lamp flickers on and off as well. after the car is stopped and turned off, the car functions normally. mechanics are unable to retrieve any codes from the system. the car has intermittantly dropped into this mode at least 10 times since we first experienced the problem in july 2018. the problem occurs at freeway speeds causing the car to rapidly decelerate in fast moving traffic with no advance warnings. this situation requires immediate evasive action to remove the car from high speed traffic lanes so it can be shut down and towed to the hyundai dealer. my wife and i consider this a life-threatening situation as it has occurred in places such as the bay bridge (with no shoulder) and a lengthy underwater tunnel (again with no shoulder). we have taken it to the hyundai dealer service shop four times. they have replicated the problem and have tried various repairs - replace transmission oil pump, replace inhibitor switch, install new auxilliary battery, and - finally - replacing the transmission. even after the transmission replacement, the car shut down while the mechanic was test driving it and provided a code to replace the crankshaft position sensor. the mechanics still are not certain they have fixed the problem. it appears as if hyundai is aware of the problem as their technical support staff have a protocol for repairing the car. given the intermittant nature of the problem, the fact that it occurs at high speeds, and the potential danger of having your car rapidly decelerate on busy freeways, i think this is a safety issue that needs to be addressed by hyundai. attached is the original service record that describes the problem (date 8/6/18). the most recent occurrence was 11/27/18.

After i exited the freeway while traveling to my mothers on thanksgiving day i was stopped at a light to turn left onto a street and when i tried to go the car would not move i had to push the gas peddle all the way down and when it finally went it jumped/jerked really bad which almost caused me to hit the car in front of me and after that it was going really slow. 2 days prior the car was lagging while slowing down to break seemed like the system wasn't reading that i want to slow down and stop which again almost caused me to have an accident. this car is a safety hazard and i only have 61,000 miles and i only had the car for 9 months. i was told it was the transmission and the car is still in the shop trying to figure out what is wrong.

Tl* the contact owns a 2012 hyundai sonata hybrid. the contact stated that the vehicle made an abnormal noise while driving approximately 55 mph. in addition, the charging system warning indicator illuminated. the vehicle was towed to autonation hyundai mall of georgia (located at 3445 buford dr, buford, ga) where it was diagnosed that the compressor failed and needed to be replaced. the manufacturer was notified of the failure. the failure mileage was 70,000.

While driving down the highway at 55mph the engine was ticking and made a large bang sound and stopped getting any power. i was not braking or turning it smelled like something was burning. i had several vehicles behind me when this happened once i got the car pulled off the road it would not move at all. now it will not start at all. lights on in car are engine light and low battery light for hybrid. when trying to start it dings loudly and you can hear the hybrid battery try to start but engine will not even roll over at all. this happened while i was driving down the road

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving 60 mph, the engine stalled and the battery warning indicator illuminated. the contact stated that the vehicle failed to restart after several attempts. the vehicle was towed to southtowne hyundai (7665 us hwy 85, riverdale, ga 30274, (770) 471-1000) where it was diagnosed that a new engine was needed. the vehicle was not repaired. the manufacturer was not informed of the failure. the failure mileage was 67,000.

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving 65 mph, the engine seized. the contact stated that the vehicle went into hybrid mode and only traveled 5 mph. in addition, the hybrid battery warning indicator illuminated. the vehicle was taken to huffines hyundai plano (909 coit road, plano, tx 75075, 469-685-1543) where it was confirmed that the engine seized, but was not diagnosed or repaired. the manufacturer was notified of the failure. the failure mileage was approximately 105,207.

Engine shook and engine seized on a busy 65 mph highway. . warning light came on to pull over and not drive. car was towed to nearest hyundai dealer. has been at service dept awaiting a new engine for 3 months. this vehicle was not part of an engine recall, yet hyundai always claims in media reports that the affected vehicles have been recalled. this vehicle is a hybrid and hyundai needs to recall these cars as well, because the engine is having the same exact issue!

Engine started making a very loud knocking sound while driving 70-75 mph. shortly there after the engine stopped and smoke came out of the hood. towed the vehicle to a local hyundai dealership that said the piston broke and went through the firewall.

Tl* the contact owns a 2012 hyundai sonata hybrid. the contact heard an abnormal noise coming from the engine compartment. while driving approximately 70 mph, the vehicle suddenly decelerated and the "hybrid pull over soon" warning indicator flashed. the vehicle stalled and was able to be coasted to the side of the road. the vehicle failed to restart and was towed to an independent mechanic who diagnosed that the hybrid battery needed to be replaced. the dealer (dicksmith hyundai, 781 congaree rd, greenville, sc 29607) indicated that the motor assembly needed to be replaced. the vehicle was not repaired. the dealer and the manufacturer indicated that the vehicle was excluded from any recall campaigns. the approximate failure mileage was 97,000.

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving various speeds or making a turn, the vehicle would sputter and then stall without warning. in addition, the vehicle experienced a drastic reduction in speed. when the accelerator pedal was depressed, it traveled to the floorboard, and then the vehicle would suddenly accelerate. the vehicle was taken to the dealer (bob brady auto mall, 4025 e boyd rd, decatur, il 62521, (217) 876-3800) where it was awaiting diagnostic testing. the contact stated that a possible cause of the failure could be the wastegate actuator. the manufacturer was notified of the failure and the contact was awaiting their response. the vin and failure mileage were not available.

I started to have engine problems around november 2017. i took the car to the dealership and i was never told that it was a recall on the engine. they just dismissed me only telling me the warranty was out. my car was 3 payments away from being pay off and the dealer wanted $11,000 (eleven thousand) to fix it. i have to ended up buying a new one since i couldn't come up with that kind of money. is there anything that i can do now, after 6-7 months after the purchase of the new car? i felt the dealer and the company was very tricky......when i noticed something was wrong with the car i was driving on a street, had to stop and call a tow truck. it was a big noise like something was inside the engine. thank you

While driving on the interstate at normal speed, a sudden and catastrophic engine failure occurred without warning or previous engine trouble. suddenly a warning sounded and displayed, "hybrid system warning, stop immediately, do not drive". car was towed to a dealership and gas engine was "locked up". this occurred suddenly and created a severe danger to the operator (my wife) as she in the center lane of 3 during rush hour. this sudden engine failure was very similar to those described as covered in the 2011-2014 safety recall involving the 2.4l engines in the base sonatas and that is the engine in my car (with the additional hybrid electric motor). i have reached out to hyundai for assistance and they have refused siting the warranty limit of 100,000 miles. we have 109,123 on the car. i am requesting that the recall also be applied to the hybrid models. i am in the process of documenting the maintenance history and will supplement this complaint as needed.

While driving the vehicle on side street we heard a knocking noise. we had our car towed to local mechanic where they diagnosed engine rod failure. car was well maintained with oil changes. oil and clean and full when error occurred. no warning lights or check engine light ever alerted. had vehicle towed to romero hyundai was purchased. they confirmed diagnosis and advised to call customer care as the vehicle previously had 10 visits to dealership for other failures. over the last month customer care has not been able to assist.

Tl* the contact owns a 2012 hyundai sonata hybrid. the contact stated that while driving at approximately 50 mph, the check engine light illuminated and the vehicle stalled. the vehicle was towed to an independent mechanic to be diagnosed. the contact was informed that there was no oil in the engine. the contact stated that the vehicle had received an oil change a week prior to the failure. the vehicle was then towed to jim burke automotive (1301 5th ave n, birmingham, al 35203, (205) 549-9387) where the contact was informed that the engine needed to be replaced. the vehicle was repaired however, less than a year after the engine was replaced the failure recurred. the contact stated that currently the vehicle was still at the dealer. the contact stated that the engine was scheduled to be replaced for a second time in november of 2018. the manufacturer was contacted and informed of the failure. the approximate failure mileage was 38,000.

I loved my hyundai right up until it died on me while driving on i26 toward columbia sc. $150 tow to the dealer in columbia to learn i had engine failure. given i had the oil changed at my dealer in atlanta before leaving, this was a total shock. the service advisor (ryan) lets me know this happens but there is a recall. hyundai will take care of me. only my car isn't covered by the recall. no problem, he says, i'll just put in a claim. since you have the exact symptoms as the recall cars, we've had hyundai fix them via a claim. since i had 101053 miles and the warranty is up at 100k, hyundai informs me i am denied.

Driving along the highway when i heard a knocking sound coming from the engine while returning home the sound got louder, then i lost control of the vehicle. i regain some control and pulled over on the side of the road. i realized that all the oil leaked out and there were some metal parts on the road. took it to the dealer when they told me a rod fell through the engine.

I was driving on the freeway when my car started driving rough. it made some loud clicking sounds and started to misfire and stutter. the next day i took it to the mechanic and he said the oil was empty, but i had just had the car in for service a few months earlier and there was no problem. the check engine and oil lights didn't illuminate. he did an oil change and tune up. the car continued to ride rough. i took it back to the mechanic a few days later and the oil was low again. there was no oil leak. he checked everything again and said it appeared the spark plugs were failing. two weeks later i had the same problem again. i added oil. i took it to another mechanic (i was out of town). he cleaned the spark plugs. four days later the car started acting really horrible, making loud clanking noise and stuttering. i added oil again and took it back to my original mechanic. he treated the oil and asked me to come back in a week so he could monitor the problem. the car drove smooth and without any problem then one week later, while driving to the mechanic the car made loud clanking noise and a cloud of white smoke came from the car. i had it towed to the mechanic. he is looking to replace my engine. in all this the indicator lights never came on (oil or check engine).

Failure to perform warranty repair. vehicle still under warranty. no help. please advice. matthew highway stalling and dash board lights, lithium battery replaced. car towed more than twice to dealership and costs for towing. thanks

Vehicle has already had the transmission changed out under 30k miles and hybrid battery changed under 60k miles. i keep getting a hybrid system failure notice on the dashboard. one time it happened when the transmission failed on the 5fwy in burbank while driving to san francisco. another time it happened on a toll road in irvine, ca where i had to get towed to the dealership. the warning is alarming and tells you not to drive. after the recent hybrid battery replacement i'm getting the hybrid system failure warning again after i drive it for a little bit and put it in park. i've been going to the tustin hyundai dealership in tustin, ca and the issue seems different everytime, but i'll never recommend a hyundai to anyone else given the number of forums and posts regarding the 2012-2016 hybrid sonatas engine issues.

Driving at approx. 60 mph, car made terrible noise in engine bay and stalled on on highway. car was towed hyundai dealer, engine seized with the same recalled problem as the standard sonata models. hyundai said the hybrid is not under recall and will do nothing!!!! what a bunch of crap!!

Tl* the contact owns a 2012 hyundai sonata hybrid. the contact stated that the engine failed and the hybrid indicator illuminated while driving. the contact was able to coast the vehicle onto the road shoulder. the vehicle was driven to the hyundai dealer (28432 camino capistrano laguna nigel, ca 92677, phone: 855-770-9074) where it was diagnosed that metal fragments entered the engine. the vehicle was not repaired. the manufacturer stated that the vehicle was not included in nhtsa campaign number: 15v568000 (engine). the approximate failure mileage was 78,000.

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving 40 mph, the accelerator pedal was depressed, but the vehicle failed to accelerate while making an abnormal knocking noise. the vehicle was taken to a local dealer (folsom lake hyundai 12530 auto mall cir, folsom, ca 95630), but the cause of the failure could not be determined. the failure recurred. the vehicle was taken to another local dealer (roseville hyundai 200 n. sunrise avenue. roseville, ca 95661) where it was diagnosed that the engine had metal debris and needed to be replaced. the vehicle was not repaired. the manufacturer was not notified of the failure. the vin was invalid. the failure mileage was approximately 70,000.

While driving heard engine knocking pulled back in drive way and engine sezied.

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving 55 mph, there was an abnormal noise coming from the engine. the vehicle was taken to the dealer where it was diagnosed that the engine failed. the vehicle was not repaired. the failure mileage was 108,000.

Tl* the contact owns a 2012 hyundai sonata hybrid. the contact stated that while driving at 55 mph, the vehicle stalled as the hybrid system catastrophic failure vehicle unsafe to drive error message displayed. the vehicle was towed to the dealer where it was diagnosed that engine failed and needed to be replaced. the vehicle was not repaired. the manufacturer was notified of the failure and the vin was not included in nhtsa campaign number: 15v568000 (engine). the failure mileage was 102,000.

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving 55 mph, the hybrid system failure warning indicator illuminated and the vehicle stalled. the contact was able to restart the vehicle. the vehicle was taken to the dealer to be diagnosed. the mechanic was unable to retrieve a fault code. the vehicle was not included in nhtsa campaign number: 15v568000 (engine). the vehicle was not repaired. the manufacturer was notified of the failure. the approximate failure mileage was 83,000.

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving 70 mph, the vehicle made a loud rattling noise. the contact pulled over to the shoulder of the highway. the vehicle was towed to a dealer where it was determined that a piston rod blew out and the motor needed to be replaced. the manufacturer was made aware of the issue. the failure mileage was 68,000.

My vehicle blew a piston rod while i was driving down the highway on cruise control doing 2000 rpm's. i have always kept up on the maintenance with this car but when i had it towed to the dealership they are saying that it was my fault. they do have an open recall on my year, make, model and engine size but not my vin. i have done my research online and i have found other cases like this. the car only has 69,000 miles on it.

04/20/16 ' mileage 71585 ' check engine light came on while driving, engine made loud noises ' had towed to hyundai ' engine needs to be replaced we purchased the 2012 hyundai sonanta hybrid pre-owned vehicle may 17, 2014 with 17128 miles on it. this is the history of our 'check engine' lights 05/26/14 ' mileage 54114 ' the evap purge valve was leaking. 11/13/15 ' mileage 63071 ' said there was a past code for a misfire and was no longer active 12/2/15 ' mileage 64087 ' sparkplugs have carbon build up.

Car had 113,000 miles. maintenance was up to date. driving from az to laquinta, ca. heard a knocking noise. stopped, hecked oil, fine, car was cool, no engine lights on. drove 4 more miles, noise got real loud and car shut down on freeway. coasted to side , engine light came on and stated do not drive. called tow truck. engine was seized. dealer stated engine was frozen and needed a new short block costing $8,800 including installation. asked why it froze, why no warning lights, they say they did not know. left car to go look for a new car and was told by several dealers and people price too high and our car had a recall. checked on line but it said our car was not recalled, but yet we read the same exact description for recall 132 that our car had done. trying to find out why are car seized up ((froze) when it was maintained and only had 113,000 miles. since we are not repairing dealer wants car removed asap so we are trying to trade it in tomorrow at honda dealer. will not buy another hyundai

This is my second 2012 sonata hybrid. the first one had so many engine issues that hyundai replaced it with another 2012 sonata hybrid. i have taken it in 5 times.for the same issue. around 20mph the car will not accelerate then it jerks forward. i almosy got hit on the highway because it wont accelerate. several weeks ago the stop safely do not drive hybrid warning came on and thr car wouldnt go. had ot towed. they found code p0717. they replaced input output speed sensors but the problem continues still. it also jerks when it changes from hybrid to gas. this car is dangerous. they cannot seem to find the problem. mileage 51000-55000.

Tl* the contact owns a 2012 hyundai sonata hybrid. when shifting into reverse or drive, the vehicle jerked violently. in addition, while driving 15-20 mph, a chime sounded and the 'safely stop and do not drive' warning message appeared on the message board. the failure recurred multiple times. the vehicle was taken to a dealer where it was diagnosed that the oil pump or the computer module failed. the vehicle was not repaired. the vehicle was not included in a manufacturers recall that was related to the failure. the approximate failure mileage was 71,415.

Tl* the contact owns a 2012 hyundai sonata hybrid. while driving 3 mph, the engine seized without warning. the contact was able to restart the vehicle. in addition, the vehicle continued to lose oil while driving. the contact replaced the oil in the vehicle numerous times. the vehicle was taken to the dealer for an oil consumption test. the vehicle was taken to be repaired, but the dealer could not diagnose the cause of the failure. the manufacturer was made aware of the issue. the failure mileage was 46,278.

While driving it down the street started to hesitate frequently while driving then heard a loud clanking sound which continued on while driving it to dealer. dealer looked at it and we were told the motor had gone out and needed to be replaced! they also said we had to pay for it because they said our oil changes were not approved! once we got the paper work back they quoted they found oil build up and large chunks of metal throughout the engine that has contaminated the valve train. they had to replace engine, cylinder head, valve, valve spring, camshafts ,gaskets! now they are issuing a recall on hyundai sonatas for this exact problem , but they are also saying our car is not included in the recall even though what they fixed is the exact problem that is listed on the recall. it took them almost 2 months to have our car in the shop because they couldn't find the parts needed to fix the engine!!!!

We were traveling down highway 125 when my 2012 hyundai sonata hybrid caught on fire. it completely burned to the ground. we had about 5 seconds to jump out of car. all 4 occupants got out of car thank you god. *tr

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