2016 Hyundai Sonata Hybrid Driver assistance Problems

EGR needs to be replaced as this is a major engine issue

NHTSA ID

11751204

Incident

Jan 7, 2026

HEV WARNING TURN OFF ENGINE SIGN WHILE DRIVING ON THE INTERSTATE MY CAR LOST POWER AND THE CAR BEHIND ME HAD TO SUDDENLY MOVE OVER THIS IS VERY UNSAFE WHILE DRIVING DOWN THE INTERSTATE

NHTSA ID

11551358

Incident

Oct 19, 2023

While driving on the highway at speed, I received a red Check Hybrid System error, and immediately lost all acceleration, putting myself and all occupants at risk on a busy interstate highway, as we tried to find a safe way to quickly change lanes and coast to a stop in a safe location. The cause is under diagnosis by a Hyundai Service Center. This was a sudden failure and there had been no previous warning alerting us to substandard system condition.

NHTSA ID

11494395

Incident

Nov 20, 2022

TL* THE CONTACT OWNS A 2016 HYUNDAI SONATA HYBRID. WHILE DRIVING APPROXIMATELY 25 MPH, THE SIDE COLLISION AVOIDANCE WARNING INDICATOR ILLUMINATED. DURING THE FAILURE, THE AUTOMATIC BRAKING SYSTEM ACTIVATED AND ABRUPTLY STOPPED THE VEHICLE. ON A SECOND OCCASION, WHILE DRIVING APPROXIMATELY 68 MPH ON THE HIGHWAY WITH NO VEHICLE CLOSE BY, THE BRAKES APPLIED ABRUPTLY. THE VEHICLE WAS TAKEN TO JOSEPH AIRPORT HYUNDAI (1220 W NATIONAL RD, VANDALIA, OH 45377, (937) 665-1777) WHERE IT WAS DIAGNOSED THAT THE COLLISION AVOIDANCE WARNING CONTROL MODULE NEEDED TO BE REPLACED. THE FAILURE RECURRED THREE TIMES. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT NOTIFIED OF THE FAILURES. THE APPROXIMATE FAILURE MILEAGE WAS 32,000. THE VIN WAS NOT AVAILABLE.

NHTSA ID

11203433

Incident

Apr 9, 2019

Mileage

32,000 mi

HTTPS://YOUTU.BE/Z4THV5A3LRK DYNAMIC CRUISE CONTROL THAT STOPS AND STARTS IN BUMPER-TO-BUMPER TRAFFIC IS WHAT SOLD ME ON THIS CAR. LAMENTABLY, I DID NOT KNOW HYUNDAI EXCLUDES AEB FROM HYBRID LTD ULTRAS. AS THE VIDEO SHOWS, FRANTIC BEEPING FROM THE FORWARD COLLISION WARNING SYSTEM WAS NOT ACCOMPANIED BY ANY BRAKING AT ALL. I SLAMMED ON THEM TOO LATE. I WAS IN DCC MODE WHEN THE WARNING SOUNDED. DCC CAN GRADUALLY SLOW FROM FREEWAY SPEED TO A STOP AND RESUME, BUT FCW APPARENTLY CANCELS DCC'S BRAKING! THIS MUST BE NO MORE THAN A DIFFERENCE IN SOFTWARE BETWEEN GAS-ONLY AND HYBRID LTD ULTRAS BECAUSE ALL SENSING AND CONTROL HARDWARE ARE IDENTICAL. HYUNDAI'S RESPONSE TO MY INQUIRIES ARE JUST REPETITIOUS CONFIRMATIONS OF WHAT I ALREADY DISCOVERED THE HARD AND EXPENSIVE WAY.

NHTSA ID

11054632

Incident

Dec 9, 2017

Mileage

39,000 mi

TL* THE CONTACT OWNS A 2016 HYUNDAI SONATA HYBRID. WHILE DRIVING 65 MPH, THE ANTI-COLLISION SYSTEM ACTIVATED WITHOUT ANY OBSTACLES NEAR THE VEHICLE. AN ALARM SOUNDED, AN INDICATOR ON THE INSTRUMENT PANEL DISPLAYED, AND THE BRAKES ENGAGED INDEPENDENTLY. THE FAILURE RECURRED ONCE MORE. THE VEHICLE WAS TAKEN TO BOUCHER HYUNDAI OF JANESVILLE (2009 MILTON AVE, JANESVILLE, WI 53545), BUT THE FAILURE COULD NOT BE DUPLICATED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND ADVISED THE CONTACT TO TAKE THE VEHICLE BACK TO THE DEALER. THE APPROXIMATE FAILURE MILEAGE WAS 17,000. UPDATED 09/01/17*LJ *JS

NHTSA ID

11006566

Incident

Mar 20, 2017

Mileage

17,000 mi

TL* THE CONTACT OWNS A 2016 HYUNDAI SONATA HYBRID. WHEN DRIVING THE VEHICLE UP OR DOWN AN HILL, IT FAILED TO MAINTAIN THE DESIRED SPEED. INSTEAD, THE VEHICLE'S SPEED WOULD INCREASE OR DECREASE 5-6 MPH FROM THE DESIRED SPEED. THE CONTACT ALSO STATED THAT THE VEHICLE'S RESUME FEATURE FAILED TO RETURN THE VEHICLE BACK TO THE DESIRED SPEED WHEN DRIVING. THE FEATURE SET THE VEHICLE AT THE AUTOMATIC SET SPEED OF 40 MPH. THE CONTACT TOOK THE VEHICLE TO THE DEALER WHERE IT WAS DISCOVERED THAT THE SPEED CONTROL ONLY WORKED ON HIGH INCLINE TYPE OF ROAD CONDITIONS. IN ADDITION, THE RESUME FEATURE FAILED. THE VEHICLE'S COMPUTER SYSTEM WAS RESET; HOWEVER, THE FAILURE RECURRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND BELIEVED IT MAY BE PART OF THE DESIGN FEATURE. THE APPROXIMATE FAILURE MILEAGE WAS 8,000. *TR

NHTSA ID

10920484

Incident

Jul 21, 2016

Mileage

8,000 mi

BRAKES AND EMERGENCY BRAKE FAILED. WARNING LIGHTS CAME ON SLOWED DOWN PULLED OFF ROAD AFTER SHORT TIME LIGHTS WENT OFF. THEN BACK ON AGAIN AND AGAIN NO BRAKES WE WERE IN TRANSIT CROSS COUNTRY. TRAVELING 75 MPH, THE SPEED LIMIT,

NHTSA ID

10883368

Incident

Jun 26, 2016

Mileage

2,200 mi