2012 HYUNDAI SONATA HYBRID Power Train Problems

The contact owns a 2012 Hyundai Sonata Hybrid. The contact stated that while driving at an undisclosed speed, the vehicle lost motive power and the low battery warning light illuminated. In addition, the contact heard a rattling sound coming from the engine before the engine seized. The vehicle was towed to the dealer where it was diagnosed with a failed hybrid system and that the hybrid system needed to be replaced. The contact was also informed that the transmission was not the original transmission, and the cooler was damaged. The manufacturer was not made aware of the failure. The failure mileage was approximately 145,000.

Mileage: 145,000

The contact owns a 2012 Hyundai Sonata Hybrid. The contact stated that while driving at an undisclosed speed and depressing the brake pedal, the vehicle lunged forward. The vehicle was taken to an independent mechanic and diagnosed with automatic transmission failure. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 76,000.

Mileage: 76,000

The contact owns a 2012 Hyundai Sonata Hybrid. The contact stated while driving at various speeds, the message "Pull Over. Stop the Vehicle" was displayed, and the vehicle failed to respond upon depressing the accelerator pedal. The contact veered to the side of the road and turned off the vehicle. The contact stated that the vehicle became drivable after waiting 30 minutes to an hour. The contact stated that the failure had been recurring while driving. Additionally, the contact stated that while reversing and depressing the accelerator pedal, the vehicle jerked, made an abnormally loud sound, and failed to respond. The contact shifted into park(P) and shifted back into reverse(R), and the vehicle jerked and responded. The contact stated that while driving at various speeds and depressing the accelerator pedal, the vehicle jerked and hesitated to respond. There was no warning light illuminated. The contact stated that she had taken the vehicle to an independent mechanic, where a diagnostic test was performed. The contact was referred to the dealer for assistance. The dealer and the manufacturer were not notified of the failure. The vehicle was not repaired. The failure mileage was unknown.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact stated that while driving at an undisclosed speed and attempting to accelerate up a hill, the vehicle inadvertently lost motive power. Several attempts to restart and jumpstart the vehicle failed. The hybrid system warning light was illuminated on the instrument panel. The vehicle was towed to the residence and later towed to an independent mechanic, who determined that the engine had failed due to metal shavings in the engine oil. The vehicle was not repaired. After investigating the failure, the contact related the failure to NHTSA Campaign Number: 20V746000 (Engine) however, the VIN was not included. The manufacturer was not notified of the failure. The failure mileage was 55,000.

Mileage: 55,000

The contact owns a 2012 Hyundai Sonata Hybrid. The contact stated while driving at various speeds, the vehicle hesitated and stalled while depressing the accelerator pedal. There was no warning light illuminated. The contact had taken the vehicle to multiple independent mechanics who were all unable to diagnose the failure due to no warning lights illuminating on the instrument panel. The contact then had the vehicle towed to the dealer where the mechanic was also unable to diagnose the failure. The mechanic informed her that the transmission needed to be replaced. The vehicle was not repaired. The failure mileage was approximately 130,000.

Mileage: 130,000

TL* THE CONTACT OWNS A 2012 HYUNDAI SONATA HYBRID. THE CONTACT STATED THAT WHILE DRIVING, AN UNKNOWN WARNING LIGHT ILLUMINATED INDICATING TO STOP THE VEHICLE DO NOT DRIVE. THE VEHICLE WAS TAKEN TO CLAY COOLEY HYUNDAI OF MESQUITE (16230 LYNDON B JOHNSON FWY, MESQUITE, TX 75150) AND WAS DIAGNOSED THAT THE FUEL PUMP THAT GO TO THE TRANSMISSION FAILED AND WAS REPLACED. THE CONTACT STATED THAT THE VEHICLE WAS PICKED UP AT THE DEALER AND WHILE LEAVING THE DEALER, THE VEHICLE STALLED. NO WARNING LIGHT WAS ILLUMINATED. ADDITIONALLY, WHILE DEPRESSING THE ACCELERATOR PEDAL, THE VEHICLE HESITATED AND STALLED. THE VEHICLE WAS TAKEN BACK TO THE SAME DEALER AND THE CONTACT WAS INFORMED THAT THE TRANSMISSION NEEDED TO BE REPLACED. THE VEHICLE WAS NOT YET REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 117,000.

Mileage: 117,000

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

Mileage: 150,000

TL* THE CONTACT OWNS A 2012 HYUNDAI SONATA HYBRID. WHILE THE GEAR WAS IN PARK WITH THE BRAKE PEDAL DEPRESSED, THE VEHICLE CAUTIONED TO MOVE. ONCE THE CONTACT TURNED THE VEHICLE OFF AND ON, THE PARK WARNING INDICATOR ILLUMINATED. RIVERSIDE HYUNDAI (8001 AUTO DR, RIVERSIDE, CA 92504, (951) 643-5065) WAS CONTACTED AND INFORMED THE CONTACT TO CALL THE MANUFACTURER SINCE THE VIN WAS NOT INCLUDED IN A RECALL. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED AND THE FAILURE RECURRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND INFORMED THE CONTACT TO CALL NHTSA TO FILE A COMPLAINT. THE FAILURE MILEAGE WAS APPROXIMATELY 150,225.

Mileage: 150,225

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

Mileage: 12

2 MAJOR PROBLEMS WITH THIS CAR. ONE IS A BRAKE ISSUE AND ONE IS TRANSMISSION ISSUE I DO HAVE APPROXIMATELY 160K ON THE CAR NOW. THE TRANSMISSION ISSUE GOES BACK TO WHEN THE CAR HAD APPROXIMATELY 40 TO 50 K ON IT AND WAS TAKEN TO DEALER BECAUSE OF SEVERE BANGING FROM ONE GEAR TO ANOTHER.. PERIODICALLY IT HAS DONE THIS SINCE THEN..DEALER COULD NOT GET IT TO DO IT.. AND SAID IT COULD BE NORMAL.. CAR IS WELL TAKEN CARE OF AND NOW NEEDS TRANSMISSION..BRAKES HAVE DONE WIERD THINGS. ONCE NEEDED TOWING BECAUSE OF ZERO BRAKES, FULL HARD PEDAL, NO BRAKE LIGHT ON OR ANY KIND OF WARNING..LUCKILY I WAS IN A SLOW DRIVE THRU.. TOWED AND PARKED CAR..2 DAYS LATER ..EVERYTHING IS GOOD..BIZARR AT THE LEAST IF NOT ABSOLUTELY DANGEROUS.

Mileage: 160,000

YESTERDAY THE CAR DROVE FINE UNTILL ABOUT AN HOUR BEFORE I WENT HOME. THEN IT STARTED WITH THE BUMPING/JERKING WHEN SWITCHING FROM ELECTRIC TO GAS. WORSE THAN IT HAS EVER BEEN. THEN THE REVVING STARTED, MORE THAN USUAL, AND WOULDN'T ACCELERATE. THEN IT WAS LIKE THE THROTTLE STUCK. GOT THE REVVING NOICE, BUT THE ECO WASN'T BURRIED AT RED, FOR ABOUT 1/4 MILE BEFORE I WAS ABLE TO PULL OVER INTO A PARKING LOT. SHUT OFF THE CAR. RESTARTED AND DROVE 1 MILE TO HOME. REVVED A FEW TIMES IN THAT PERIOD.

Mileage: 151,000

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.

Mileage: 131,000

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.

Mileage: 80,000

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

Mileage: 120,000

FIRST INCIDENT, SUNDAY, SEPTEMBER 9, 2018. WHILE DRIVING, CAR SUDDENLY FLASHED WARNING LIGHTS, WITH MESSAGE PERTAINING TO THE BATTERY. CAR DECELERATED EXTREMELY RAPIDLY AND BECAME HARDER TO STEER. PULLED CAR OVER OUT OF STREET AS IT LOST POWER. IT STOPPED. LIGHTS REMAINED ON. TURNED CAR OFF AND THEN TURNED IT BACK ON. IT CRANKED UP AND COULD BE DRIVEN AS IF THE INCIDENT NEVER HAPPENED. THERE WERE NO WARNING LIGHTS OR WARNING MESSAGE WHEN THE CAR WAS RESTARTED. SECOND INCIDENT, MONDAY, SEPTEMBER 10, 2018. WHILE DRIVING THE CAR TO THE DEALERSHIP FOR DIAGNOSIS OF THE PROBLEM, THE CAR SUDDENLY LOST POWER AGAIN, THE WARNING LIGHTS FLASHED AGAIN, AND AGAIN IT BECAME HARD TO STEER. THIS TIME DRIVER WAS NOT ABLE TO PULL THE CAR OVER; IT STOPPED IN THE STREET. DRIVER TURNED THE CAR OFF, THEN TURNED IT BACK ON AND DROVE TO THE NEAREST SERVICE STATION. A TOW TRUCK WAS CALLED AND THE VEHICLE WAS TOWED TO THE DEALERSHIP. THE DEALERSHIP STATED THE VEHICLE DID NOT REGISTER ANY CODE THAT THEY COULD DETECT. THEY HAD A TECHNICIAN DRIVE IT FROM WORK TO HOME EACH DAY AND THE VEHICLE NEVER GAVE ANY PROBLEM. THEY COULD NOT FIND ANY PROBLEM AT ALL WITH THE VEHICLE THAT REQUIRED SERVICE OR REPAIR. VEHICLE WAS PICKED UP ON SATURDAY, SEPTEMBER 16, 2018. THE DEALERSHIP WAIVED THE DIAGNOSTIC FEE SINCE THEY WERE NOT ABLE TO DIAGNOSIS A PROBLEM. THE VEHICLE HAS BEEN TRADED-IN. THE ISSUE WAS REPORTED TO HYUNDAI MOTOR CORPORATION.

Mileage: 111,600

UPON OBTAINING MY STATE INSPECTION A COUPLE WEEKS AGO AROUND 60K MILES, MY MECHANIC POINTED OUT A SLIGHT "THUNK" WHEN TURNING THE STEERING WHEEL AND SAID TO CHECK FOR RECALLS. SINCE THEN IT HAS BECOME INCREASINGLY MORE NOTICEABLE. IT "THUNKS" OR CLICKS JUST TO THE RIGHT OR LEFT OF CENTER. FIRST I ONLY NOTICED IT WHEN PARKED, NOW I NOTICE IT WHEN DRIVING AND THE STEERING COLUMN RATTLES VERY LOUD WHEN I GO OVER EVEN A SMALL BUMP IN THE ROAD. I AM CONCERNED THAT IT IS GETTING WORSE AND TRYING TO GET AN APPOINTMENT TO HAVE IT LOOKED AT. I SEE WHERE THIS WAS A BIG PROBLEM WITH THE 2011 MODEL AND NOW IS STARTING WITH THE 2012 AROUND SIMILAR MILEAGE. CLICKING AND RATTLING NOISE IN STEERING COLUMN, NOT ONLY WHILE TURNING, BUT SMALL BUMPS WILL MAKE IT RATTLE. HOPE HYUNDAI ISSUES A RECALL SOON!!!

Mileage: 60,000

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.

Mileage: 3

VEHICLE TRANSMISSION WENT UP WITH NO PRIOR ISSUES. REGULAR SONATA 2012 ENGINES HAVE HAD RECALL ON TRANSMISSION - WHY NOT HYBRIDS AS THEY ARE HAVING THE SAME ISSUE. VEHICLE WAS IN MOTION ON HIGHWAY AND ONCE IN TRAFFIC HAD ISSUES LIKE GOING BETWEEN 2ND AND 3RD GEAR.

Mileage: 170,948

I WAS DRIVING SOUTHBOUND I-405 NEAR RENTON, WASHINGTON AROUND 7:30 A.M. MORNING RUSH HOUR TRAFFIC. MESSAGE FLASHED ON "CHECK CHARGING SYSTEM HYBRID SYSTEM WARNING SAFELY STOP AND DO NOT DRIVE" AT 80,725 MILES. DROVE TO HYUNDAI DEALER 4 MINUTES AWAY WHO READ CHECK ENGINE LIGHT ERROR CODE DIAGNOSING PROBLEM AS HPCU RESERVOIR MODULE FAILURE. HYUNDAI DEALER REPLACED PART UNDER POWERTRAIN WARRANTY AT NO COST TO ME. COST OF MODULE WAS $3,527.45 PLUS $135 FOR 1 HR LABOR.

Mileage: 80,725

TL* THE CONTACT OWNS A 2012 HYUNDAI SONATA HYBRID. THE CONTACT STATED THAT THE VEHICLE DID NOT REGISTER THE CORRECT GEAR AFTER IT WAS SHIFTED INTO REVERSE. THE VEHICLE ALSO JERKED IN THE OPPOSITE DIRECTION IT WAS SHIFTED. THE FAILURE OCCURRED WITHOUT WARNING. NORM REEVES HYUNDAI SUPERSTORE (18900 STUDEBAKER ROAD CERRITOS, CA) WAS CONTACTED AND THE VEHICLE WAS NOT DIAGNOSED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE, BUT NO ASSISTANCE WAS OFFERED. THE FAILURE MILEAGE WAS APPROXIMATELY 107,000.

Mileage: 107,000

DROVE VEHICLE ON INTERSTATE 405 SOUTHBOUND AT 60 MPH AND ERROR MESSAGE APPEARED THAT THERE WAS A HYBRID SYSTEM FAILURE. SAFELY STOP AND DO NOT DRIVE. TOWED TO HYUNDAI DEALERSHIP WHO DETERMINED FROM ERROR CODES THAT THE POWER TRAIN FAILED AT 63K MILES. HYUNDAI HAD TO REPLACE THE TRANSMISSION.

Mileage: 63,000

TL* THE CONTACT OWNS A 2012 HYUNDAI SONATA HYBRID. WHILE DRIVING 45 MPH, THE VEHICLE LOST POWER AND CAME TO A COMPLETE HALT. IN ADDITION, THE ACCELERATOR PEDAL WAS DEPRESSED BUT THE VEHICLE FAILED TO ACCELERATE. "HYBRID BATTERY LOW, SHIFT TO PARK POSITION" WAS DISPLAYED ACROSS THE MESSAGE BOARD. THE FAILURE RECURRED ON NUMEROUS OCCASIONS. THE VEHICLE WAS TOWED TO A DEALER, BUT WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 62,000.

Mileage: 62,000

CHECK CHARGING SYSTEM LIGHT COMES UP, SOME TIMES CANT CHANGE FROM DRIVE TO REVERSE, OTHER TIMES CHANGE PARK TO ANY OTHER GEAR, HAVE TO TURN THE CAR OFF AND ON AGAIN . THE CAR JUMPS WHEN GETTING OUT OF EV MODE, HESITATES WHEN GOING OUT OF EV MODE, MAKING IT VERY DANGEROUS AT A INTERSECTION AND U TURNS. I FOUND SO MANY COMPLAINS ABOUT THE HYUNDAI HYBRID 2012 , .....SAME PROBLEMS, HOW COME NOBODY DOES ANYTHING ??? *TR

Mileage: 22,500

THE CAR WAS AT A STOP LIGHT AND BURST INTO FLAMES, ALL OF THE SONATAS HAVE THIS PROBLEM, ALL SONATAS WILL AT THE LEAST BURN UP THE ENGINES, TRANSMISSIONS, OR BATTERIES DUE TO THIS PROBLEM. OUT OF 35 SONATAS TESTED 35 HAD THIS PROBLEM. CONTACTED HYUNDAI USA, HYUNDAI FULLERTON, HYUNDAI CONSUMER COMPLAINT LINE AND THEY REFUSE TO DO ANYTHING ABOUT IT . EVERY SONATA HYBIRD IN THE WORLD, (TO THE BEST OF MY KNOWLEDGE) WILL BURN UP THE ENGINE, TRANSMISSION, OR LITHIUM BATTERIES (WHICH WILL CATCH FIRE) BETWEEN 70,000 &120,000 MILES, HYUNDAI WILL NOT WARRANTY THE FAILURE, THIS IS CAUSED BY A MANUFACTURE DEFECT.. A PART IN THE COOLING SYSTEM WILL DISINTEGRATE AND CRUMBLE APART LIKE A WET COOKIE, THEN YOU WILL HAVE A 3/4" HOSE COMING OFF THE WATER PUMP PUMPING ALL THE WATER OUT OF THE COOLING SYSTEM, WITH LESS THEN A GALLON OF COOLANT THIS WILL TAKE 2 SECONDS, EVERYTHING WILL OVERHEAT AND YOU CAN THROW THAT CAR AWAY, A NEW ENGINE IS $7,000.00 A TRANSMISSION, $6,000.00 LITHIUM BATTERIES $10,000.00 ALL PRICES DO NOT INCLUDE INSTALLATION.. *TR

Mileage: 77,259

RECENTLY MY HYBRID SONATA CAR WOULD NOT PICKUP SPEED ESPECIALLY BETWEEN 10 AND 40 MILES PER HOUR. IT WOULD ALSO BADLY JERK WHILE TRYING TO ACCELERATE OR MAKE HIGH PITCH SOUND WITHOUT PICKING UP SPEED. I HAD TO PULL TO THE SIDE OF THE ROAD COUPLE OF TIMES AND BIT SCARED IN DRIVING IT. HAD THE CAR TOWED TO THE DEALER. THE DEALER AFTER LOOKING AT THE ISSUE AGREED TO COMPLETELY REPLACE THE TRANSMISSION WITH THE REFURBISHED (FROM HYUNDAI) TRANSMISSION :(. *TR

I HAD BEEN EXPERIENCING A HESITATION WHEN ACCELERATING, A LURCH WHEN HITTING THE BRAKE AS WELL AS SOMETIMES WHEN ACCELERATING AS THOUGH THE GEARS COULD NOT SHIFT PROPERLY. THIS DID NOT OCCUR AS OFTEN IF THE CAR WAS OUT OF BLUE DRIVE. THIS HAD BEEN GOING ON FOR ABOUT 4 MONTHS. I HAD TAKEN IT TO A DEALER AND CALLED A SERVICE DEPARTMENT BUT NONE OF THEM COULD EXPLAIN WHY IT MIGHT BE HAPPENING AND I COULD NOT MAKE THE ISSUE REPEAT ONCE I GOT IT TO THE DEALER. ON SATURDAY I WENT TO DRIVE MY CAR, PULLED OUT AND WAS GOING ABOUT 40 MPH ABOUT 2 MIN AFTER I HAD STARTED THE CAR AND ALL OF A SUDDEN MY FOOT WAS TO THE FLOOR, THE RPM WAS ALL THE WAY UP TO RED AND MY CAR WAS SLOWING DOWN! I PULLED OVER TURNED THE CAR OFF AND STARTED IT AGAIN, I PULLED OUT AGAIN AND IT BEGAN TO DO THE SAME THING BUT WHEN I HIT THE BRAKES THE CAR LURCHED FORWARD WORSE THAN EVER BEFORE. I PULLED INTO A GAS STATION CUT THE CAR OFF AND GOT OUT TO LET MY BOYFRIEND TRY IT (HE HAD BEEN FOLLOWING ME IN HIS CAR AND DID NOT KNOW WHAT WAS WRONG). WHEN HE GOT IN TO TRY IT HE TRIED TO PUT IT IN REVERSE AND IT WOULD NOT SHIFT AT ALL. IT WAS LIKE IT WAS STILL IN PARK, BUT WHEN HE TRIED TO PUT IT BACK IN PARK THE CAR RESPONDED AS THOUGH HE HAD SHIFTED IT. OBVIOUSLY SOMETHING WAS VERY WRONG WITH THE TRANSMISSION. WE CALLED THE 24 HOUR ROADSIDE ASSISTANCE AND GOT TOWED TO THE NEAREST DEALERSHIP. THEY MECHANICS SPENT ALL DAY TAKING IT A[ART AND COULD NOT FIND THE SOURCE OF THE PROBLEM. THE SENIOR MECHANICS CAME IN ON MONDAY AND SAID I WOULD NEED A NEW TRANSMISSION, THAT THE EXISTING TRANSMISSION WAS "ALL BURNED UP" THEY CLAIM THIS IS A RARE INTERNAL PROBLEM AND THAT A NEW TRANSMISSION WILL FIX THE ISSUE. ALL OF THIS WAS COVERED UNDER MY WARRANTY BUT IT COULD HAVE CAUSED MAJOR PROBLEMS HAD I BEEN ON THE HIGHWAY WHEN THIS HAPPENED! *TR

Mileage: 23,200

SEE SUBMISSION NUMBER 10559603 SENT PRIOR TO THIS ON 1/14/2014: THIS IS A CONTINUATION OF THE EXPLANATION OF THE CRUISE CONTROL/TRANSMISSION/POWER TRAIN ISSUE EXPERIENCED WITH THE VEHICLE SINCE NEW. THE TEXT FROM THAT SUBMISSION CONTINUES TO ITS END. "IT WOULD APPEAR THAT THE CRUISE CONTROL/POWER TRAIN COMPUTER PROGRAM HAS SOME ERRORS IN IT OR NEEDS UPDATING TO CORRECT THE PROBLEM OF EXCESSIVE ACCELERATION WHEN RE-ATTAINING A SET SPEED FROM A COAST DOWN THAT CAUSES THE CAR TO GO BELOW THE SET SPEED BEFORE THE SENSORS DETECT AND ACTIVATE THE ACCELERATION REQUIRED TO BRING THE CAR BACK UP TO THE SET SPEED. THEN IS 'SHOOTS' THE CAR FORWARD AT FULL POWER-LIKE UNINTENDED ACCELERATION MIGHT- AND SEND IT UP TO AS MUCH AS 10 MPH ABOVE THE 'THEN SET' SPEED I HAVE DESIRED. IF THERE IS A CORNER AT THE END OF THE RISE, THE CAR CAN FEEL OUT OF CONTROL DURING THIS ACCELERATION AS IT IS AT FULL POWER DURING THE ACCELERATION PHASE. THE TRANSMISSION ALSO DOWN SHIFTS 2 OR 3 GEARS DURING THIS PROCESS WHICH AGGRAVATES THE FIERCE ACCELERATION FEELING. THESE INCIDENTS HAVE BEEN REPORTED BOTH TO THE HYUNDAI DEALER AND TO HYUNDAI. HYUNDAI SAYS, TAKE IT TO OUR DEALER; THE DEALER SAYS THEY CAN FIND NOTHING WRONG AS NO DASH WARNING LIGHTS ARE EVER SHOWING AND THEIR ELECTRONIC SCANNING BRINGS UP NOTHING OF ANY KIND OF PROBLEM. THIS MAY OR MAY NOT BE EXCLUSIVE TO THE SONATA HYBRID WITH CRUISE CONTROL AND SINCE MANY PEOPLE DO NOT USE CRUISE CONTROL ON WINDING RURAL ROADS, THEY MAY NOT/NEVER EXPERIENCE THE SAME SENSATION THAT CAN HAPPEN OFTEN TO ME. I CAN DEAL WITH IT. NHTSA SHOULD KEEP THIS REPORT ON FILE IN CASE OTHER CRUISE CONTROL OR ACCELERATION ISSUES WITH HYUNDAI VEHICLES SURFACE AS MY REPORT IS PRECISELY DEFINED AS TO WHAT TYPE OF ROAD CONDITION IT OCCURS ON AND WHAT HAPPENS. THANK YOU. *TR

Mileage: 8,900

PURCHASED NEW IN MAR. 2013, NOT OUR FIRST HYBRID. CAR BEGAN TO HAVE SHUDDER/JERKY/ROUGH TAKE OFF FROM MORNING START AND FIRST STOP SIGN AT END OF STREET. THIS BECAME MORE OFTEN AND WORSENED. ONE MORNING LEFT CURB AS USUAL, BRAKES LOCKED UP AT STOP SIGN AND WARNING LIGHT ON DASH FOR BRAKE PROBLEM. WAS ABLE TO BACK CAR BACK INTO CURB SPOT AND HAD TOWED TO DEALERSHIP. DATE GIVEN WAS ABOUT THE TOWING DATE. CAR WAS IN SHOP AROUND THREE WEEKS DUE TO NEEDING NEW BRAKE MODULE OR SOMETHING THAT WAS LEAKING INTERNALLY INSIDE BRAKE UNIT FROM FACTORY. CAR ALSO HAD ISSUE TO WERE THE BATTERY WOULD NOT CHARGE PROPERLY. WORKED CORRECTLY WHEN PURCHASED BUT THEN WOULD NOT CHARGE PAST 50% AND USUALLY LESS THAN. REPAIRS MADE AND LOTS OF UPDATES AND SENSOR ADJUSTMENTS AND WE WERE GIVEN CAR BACK. SADLY IT ONLY LASTED A FEW MONTHS AND HAD TO BE TOWED AGAIN. LATE AUG, EARLY SEPT, THE CAR STARTED TO JERK AT TAKE OFF AGAIN. I TRIED JUST SITTING AT CURB FOR AWHILE AFTER STARTING CAR TO LET SENSORS WARM UP. THIS SEEMED TO HELP FOR SHORT TIME. PROBLEM WORSENED AGAIN UNTIL WIFE COMPLAINED. I DROVE FULL TIME AND IT HAD GOTTEN WORSE TO BAD AND ALL THE TIME. BAD ACCELERATION, LIKE BRAKES NOT LETTING OFF. LAST STRAW! NOV 1ST 2013, CAR JERKED AND SHUDDERED AT TAKE OFF, BRAKES LOCKED UP SOLID AT STOP SIGN, LOCKED UP AGAIN AT SECOND STOP SIGN, ENTERING TRAFFIC TO GET BACK HOME ... CAR STOPPED DEAD IN MIDDLE OF LEFT HAND TURN IN MIDDLE OF HIGHWAY!! FULLY LOADED LOG TRUCK COMING AT ME PASSENGER SIDE. TOOK 2-3 HARD STOMPS ON ACCELERATOR PEDDLE TO GET CAR MOVING, GAS ENGINE FINALLY REVVED HIGH BUT CAR JUST CRAWLED FORWARD!!! THANKFULLY THE TRUCK HAD STARTED BRAKING AS SOON AS HE SAW CAR HESITATE IN STREET AND CAR CRAWLED FORWARD ENOUGH THAT I DID NOT GET HIT. BUT THAT GRILL FILLED THE ENTIRE PASSENGER WINDOW. CAR TOWED TO SHOP AGAIN ON MON 4TH AM. CALLED ON 5TH, HUGE SOFTWARE UPDATE, BUT NO GUARANTY !?!?? *TR

Mileage: 1,800

WHILE SLOWLY MOVING DOWNHILL, ON THE FREEWAY, DURING RUSH HOUR TRAFFIC, I ATTEMPTED TO CHANGE LANES AND ACCELERATED QUICKLY. THE SWITCH FROM HYBRID TO GAS ENGINE INTERFACE ONLY CAUSED THE ENGINE TO REV (INCREASE RPM) WITHOUT ANY GEAR BEING ENGAGED. I QUICKLY LET OFF THE PEDDLE AND DEPRESSED IT AGAIN. IT THEN ENGAGED THE TRANSMISSION, NARROWLY AVERTING AN ACCIDENT. THIS HAS HAPPENED 5-6 TIMES SINCE PURCHASING THIS CAR WHEN TRAVELING SLOWLY AND THEN TRYING TO GET A BURST FROM THE GAS ENGINE. I SPOKE WITH THE DEALERSHIP, AND TOOK IT IN FOR A CHECK PER THEIR RECOMMENDATION. THEY FOUND NOTHING AND COULD NOT REPRODUCE IT, ALTHOUGH THEY DID NOT TRY THE SAME CIRCUMSTANCE. THEY ONLY ATTEMPTED TO STOP AND ACCELERATE AT WHICH I SAID THEY WOULDN'T GET IT TO HAPPEN THAT WAY.

Mileage: 7,450