2011 Hyundai Sonata Hybrid: sudden loss of power

Filed May 2, 2019 · Electrical, Engine · 156,947 miles · OH

May be engine or electrical or software problem; lost power on interstate from 70 MPH to 20 MPH then got off exit, shut down and waited a few minutes and then started it up and no problem again; has happened 3 times in last 4 months; taken to dealer twice without success- no codes in computer; now car is sputtering and jumping when gas is applied after slow down/stop. Now getting flashing/blinks on/off ready light on dash. Saw the federal safety agency id number 10056327 and sounds like my issue. Drive 40 miles one way to work on interstate daily and am getting very concerned about losing power. I have reported it to dealer twice and nothing done about it and reported it hyundia customer service center without a call back to date.

Filed Jan 13, 2019 · Engine · 60,000 miles · SC

Car was in motion. Lost power to the drive system and warning came on to check charging system. Nearly caused an accident as the vehicle slowed rapidly. I pulled over, turned the car off, turned car on and then it continued to drive normally.

Filed May 4, 2017 · Acceleration, Brakes · 76,000 miles · FL

Charging system malfunctioned, sensors melted in valve trane, radiator elbow and fill neck blew off, complete engine failure and battery failure. I have had a problem with the "check brake" light and an alarm going off. However, when I stopped driving and had it towed to the dealership they could find nothing. Prior to this incident, I took a photo of my dash, I had 76,499 miles and the coolant meter did not read hot. I had had the coolant system flushed at 65,000 miles, and I had all oil and fluids checked again after this incident. The breakdown: three hours into a roadtrip, the A/C began blowing warm, simultaneously - the "the check brake" light and alarm came on, and the "check charging system" light came on. I lost power to accelerate (or brake well) and immediately pulled over and took a photo of my dash warnings (76919 miles). The heat sensor was in the "cool" half, the battery gage showed no power. Battery so low key would not start car. I had the car towed. "tech found that elbow and radiator have holes in them vehicle overheated causing engine to blow." tiffany richardson said "tech believe vehicle was driven with low coolant level causing vehicle to run hot melting sensors in the valve train and the pipes to fail." the tech is wrong, the coolant system was inspected and flushed at 65,000 miles, and was not due for another inspection. I had had coolant levels checked less than 1000 miles ago, and the heating sensor on dash did not read hot, at the point of breakdown or after a road trip 500 miles ago. Others had the problem at 3000 miles! It's the hpcu. The power for both electric motors is routed through hpcu. The inverters allow the A/C motors to be driven by d/c batteries. This caused the "check charging system" error. This is $15,000.00 and I owe $4000 on the car - 100,000 warranty has denied it & I am original owner.

Filed May 4, 2017 · Driver assistance, Electrical · 76,919 miles · FL

Charging system malfunctioned, sensors melted in valve trane, radiator elbow and fill neck blew off, complete engine failure and battery failure. I have had a problem with the "check brake" light and an alarm going off. However, when I stopped driving and had it towed to the dealership they could find nothing. Prior to this incident, I took a photo of my dash, I had 76,499 miles and the coolant meter did not read hot. I had had the coolant system flushed at 65,000 miles, and I had all oil and fluids checked again after this incident. The breakdown: three hours into a roadtrip, the A/C began blowing warm, simultaneously - the "the check brake" light and alarm came on, and the "check charging system" light came on. I lost power to accelerate (or brake well) and immediately pulled over and took a photo of my dash warnings (76919 miles). The heat sensor was in the "cool" half, the battery gage showed no power. Battery so low key would not start car. I had the car towed. "tech found that elbow and radiator have holes in them vehicle overheated causing engine to blow." tiffany richardson said "tech believe vehicle was driven with low coolant level causing vehicle to run hot melting sensors in the valve train and the pipes to fail." the tech is wrong, the coolant system was inspected and flushed at 65,000 miles, and was not due for another inspection. I had had coolant levels checked less than 1000 miles ago, and the heating sensor on dash did not read hot, at the point of breakdown or after a road trip 500 miles ago. Others had the problem at 3000 miles! It's the hpcu. The power for both electric motors is routed through hpcu. The inverters allow the A/C motors to be driven by d/c batteries. This caused the "check charging system" error. $15,000.00 fix. I owe $4000. 100,000 warranty has denied it & I am original owner. Hpcu recalled b4? .

Filed May 4, 2017 · Airbags, Driver assistance · 76,919 miles · FL

Charging system malfunctioned, sensors melted in valve trane, radiator elbow and fill neck blew off, complete engine failure and battery failure. I have had a problem with the "check brake" light and an alarm going off. However, when I stopped driving and had it towed to the dealership they could find nothing. Prior to this incident, I took a photo of my dash, I had 76,499 miles and the coolant meter did not read hot. I had had the coolant system flushed at 65,000 miles, and I had all oil and fluids checked again after this incident. The breakdown: three hours into a roadtrip, the A/C began blowing warm, simultaneously - the "the check brake" light and alarm came on, and the "check charging system" light came on. I lost power to accelerate (or brake well) and immediately pulled over and took a photo of my dash warnings (76919 miles). The heat sensor was in the "cool" half, the battery gage showed no power. Battery so low key would not start car. I had the car towed. "tech found that elbow and radiator have holes in them vehicle overheated causing engine to blow." tiffany richardson said "tech believe vehicle was driven with low coolant level causing vehicle to run hot melting sensors in the valve train and the pipes to fail." the tech is wrong, the coolant system was inspected and flushed at 65,000 miles, and was not due for another inspection. I had had coolant levels checked less than 1000 miles ago, and the heating sensor on dash did not read hot, at the point of breakdown or after a road trip 500 miles ago. Others had the problem at 3000 miles! It's the hpcu. The power for both electric motors is routed through hpcu. The inverters allow the A/C motors to be driven by d/c batteries. This caused "check charging system" error. This is $15,000.00 and I owe $4000 on the car - 100,000 warranty has denied it & I am original owner. Airbag to

Filed Nov 21, 2016 · Engine, Steering · 78,880 miles · NJ

Metal shavings in engine oil pan causing engine failure, knocking, lose of power while driving, manufacturing defect on small block engine but not on the small block hybrid... We were told by the dealer but the hybrid still has the same defect as the none hybrid same exact issues metal shaving in oil pan defects from manufacturer. The none hybrid was recalled but a recall was never issued for the hybrid stated by employees at global auto mall in new jersey.

Filed Sep 9, 2015 · Electrical, Engine · 53,060 miles · PA

We were driving on i81n in virginia when it sounded like we were driving over gravel.I thought it could have been a tire. Found tires were ok. Waited to pull out safely. Seconds after we entered i81n, we began to lose power, A/C and a warning light indicating to check hybrid system came on in message board. We pulled off at exit 277n and had enough power to find a safe place to pull over.I discovered that the serpentine belt was shredded. We were towed to a hyundai dealer where the car sat overnight on 9/6/15 until service opened on 9/8/15. The serpentine belt was replaced as well as the water pump belt which was also damaged. The mechanic informed me the new belt was not running true on the tensioner and a ridge had formed on the outside surface of the tensioner. My opinion is that the part was defective because the belt was not running true.

Filed Apr 14, 2014 · Engine · 65,000 miles · OH

The car suddenly started chiming loudly, the check engine light lit up, a second light lit on the dash and a warning message that said to check the charging system appeared on the console. The car became near impossible to operate: limited acceleration, jerked repeatedly trying to stop in a safe location, lost power to AC system....dangerous situation if other traffic had been nearby. The car is now inoperable as we wait for a tow to take it to the nearest dealer.