Battery problems of the 2011 Hyundai Sonata

Nine problems related to battery have been reported for the 2011 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Hyundai Sonata based on all problems reported for the 2011 Sonata.

car   Battery problem 1
Failure Date: 03/04/2012

From: consumeraffairs@hmausa. Com subject: Hyundai Sonata 2011 date: tue, 6 Mar 2012 18:01:34 -0700 dear javier rivera: thank you for contacting Hyundai motor America. We appreciate the opportunity to assist you, but we apologize for the circumstances that prompted your contact. We would like to refer you to your servicing dealership for the diagnosis of your battery concern prior to any decisions being made about a buyback situation. We apologize for any inconvenience this may cause you but we need additional information regarding your situation to review your case further. Once you have contacted your dealership for the repair details, please contact us with the dealership contact information that includes who is working with you and what they are offering to do to address your concerns. We have documented your comments. Your case number 4751061 can be referenced if we can provide further assistance. Thank you for contacting Hyundai motor America. Consumeraffairs@hmausa. Com sent: mon, 05 Mar 2012 20:55:27 -0700 subject: Hyundai Sonata 2011 to whom it may concern, I am the owner of a Hyundai Sonata hybrid 2011. I recently bought the car in November 2011. I was very excited of buying my first hybrid and the significant savings in gas. I have been happy with the car, although I have realized that the savings in gas were good in the beginning, but have dramatically decrease lately. I thought it was our driving and had not paid too much attention to this until yesterday when the following incident occurred. Yesterday, Sunday March 4, 2012, around 9:00 am on our way to church with the entire family, while my son, 15 years old with a learners permit. Out of the blue the car jerked, stalled and completely lost power on southwest parkway. My son, an inexperience driver, totally panic and almost crashed into a passing car. The car was towed to the dealer, round rock Hyundai in TX. Today the dealer was unable to give additional in.

car   Battery problem 2
Failure Date: 12/17/2011

After having 3 of 5 recall fixes performed, battery charging system warning light and sounds activated. Car lost power at low revs. Required giving full throttle to enable gas engine to kick in and gain enough speed to safely stay with traffic. After pulling over and turning engine off/on, problem seemed to resolve itself. Happened again in highway traffic while entering exit ramp resulting in a dangerous loss of power. Returned vehicle to dealership for repair. Dealership assured me that they knew what the issue was and that it would be repaired. 2 days later issue happened 3 times. Each time on the highway at approx. 65mph with nowhere safe to conveniently pull over.

car   Battery problem 3
Failure Date: 10/28/2011

The "check charging system" light appeared the 1st week that we had this new( Hyundai 2011 Sonata hybrid) car while my wife was driving the car. She lost power to the vehicle and had to stop and restart. I returned it to the dealer that afternoon and they stated that the battery terminal was loose and needed adjustment. The car had about 200+ miles on it. Today, November 6, 2011, I was with my wife and she was driving and the " check charging system' light again came on with an audible alarm. ( about 400+ miles). We lost power at a traffic light and had to stop and the car was difficult to restart. After checking the Hyundai forums, this appears to be a frequent occurrence with numerous drivers around the country. Many registered forum users are concerned that this is a major safety issue and needs to be addressed immediately. I am taking the car back to the dealer on Monday morning and wanted to have this documented. My wife does not feel safe in this vehicle ( and neither do I at this time).

car   Battery problem 4
Failure Date: 09/22/2011

I drive the Hyundai Sonata hybrid. The first time the problem occurred at approx 9800 miles, I was driving 60 mph on a highway when the vehicle lost battery power and an alarm sounded, and then a signal indicating to "check charging system. " I immediately took the vehicle to my Hyundai dealership where they were aware of the issue, but did not know how to fix it and suggested I just simply turn off and then restart my car. It happened two additional times, one while approaching a stop light, and another time while I was stopped at a stop light. The last time it happened, I could not get my vehicle to reset by restarting once. I had to shut the vehicle off, then attempted several times to restart. The 4th time I tried to start it, I was able to do so sucessfully. I did notice the last time it happened, the engine light remained on even after battery power was restored. I am taking it back to the dealership tomorrow and demanding a solution. This is just too dangerous to lose power in high-speed traffic, and the problem seems to be occuring at all speeds.

car   Battery problem 5
Failure Date: 09/22/2011

2011 Hyundai Sonata hybrid stops loses power comes to complete stop - for the third time in two months when I started my car the service indicator light came on and stayed on. I noticed this time that the car would not go faster than 40 mph and the engine is not running the car appears to be running just off the electric motor and the battery. The car went for about 2 miles and the car lost power and came to complete stop. I had to completely shut off the car and restart it before it would move again - this is a re-occurring and very dangerous situation.

car   Battery problem 6
Failure Date: 09/06/2011

Upon pu;;ing out from a stop sign the engine stalled, after coasting to a stop and placing in park I tried to restart engine. All lights went off and motor did not turn. Attempted again, same thing then passenger compartment filled with smoke. Fire dept arrived and determined somewhere in dash a component had fried. They then disconnected battery. Vehicle was towed to dealer, per dealer engine locked up and they have to disassemble dash to determine what had fried.

car   Battery problem 7
Failure Date: 09/01/2011

Sonata hybrid. Driving on the freeway at 60 mph on cruise control. Exit ramp with cruise control off and car gliding to stop light in ev mode. Stopped at red light for 3-5 seconds. Then pushed the accelerator . . . The car lost power, would not move, instrument panel lights flashed, audible ding warning sounded. Display screen showed "check charging system" then screen showed to put car in park. I then placed car in park and pushed the ignition button and car had power to drive off the street and out of the flow of traffic. I then looked over the car, no warning lights or sounds. I test drove it in a parking lot to make sure it would not stop again. Conditions at time of event: blue driving mode, gas tank level at 1/2, hybrid battery charge at 1/2 radio on, headlights on, air conditioner off, and the outside temp. About 77f. I'm not sure which component failed. Electrical, engine or the hybrid power control unit.

car   Battery problem 8
Failure Date: 08/07/2011

My 2011 Hyundai Sonata hybrid "check charging system" lamp illuminated with chime alarm activation while driving, causing loss of engine power. Hybrid battery charge level was at 1/2, which is where it normally is. I pressed on gas pedal and got no response, and vehicle came to a stop as if I applied the parking brake. I placed vehicle in park, shut off engine and re-started it and it ran normally. This is the second time it happened in the past 4 weeks or so. On a Hyundai forum website, there is at least 1 other customer which has had the same problem with their hybrid as myself. It is very dangerous situation if you are on the highway and you are forced to stop while in flow of traffic.

car   Battery problem 9
Failure Date: 08/30/2010

My 2011 Sonata has 7600 miles on it. The problem began around 5000 miles, but has gotten progressively worse. Upon trying to turn the car off, the engine shuts off, but the key is stuck in the accesory position. I can restart the car and drive, but I can't get the key out. It just stays either in the accesory or the on position. I've had to unhook my battery to keep it from dying because I can't get the key out. At first, I could just move the gearshift out of park and back into park, and that would usually unlock the key. As time went by, the problem went from happening once a week, to once a day, to nearly every single time I drive the car. Also, once it started happening more frequently, I couldn't troubleshoot to get the key out. I would just have to wait, sometimes up to two hours, and try again. Eventually, the key would just pop right out as if nothing had been wrong in the first place. Very frustrating and time consuming. The car is currently at the dealership getting a new ignition. We'll see how it works.

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