2012 Hyundai Sonata Hybrid well maintained by original owner, under 130,000 miles. May of 2025 AC stopped working intermittently (Hyundai dealer replaced AC hose). Aug 2025 AC stopped working AGAIN (same dealer could NOT identify problem). Car has consistent Hybrid System Warning! Safely Stop and Do not Drive messages lights and sirens when braking. Code PA186 comes up (low state of charge code for hybrid battery). December 2025 brought car back to SAME Hyundai dealer who NOW says car suddenly needs a 10k transmission (BUT still no idea what PA186 code is related to). Got transmission drained at different shop and NO NEW TRANSMISSION NEEDED! Every repair shop OUTSIDE OF HYUNDAI who has scanned for codes gets the PA186 error and say it is related to HYBRID BATTERY LOW STATE OF CHARGE (I am the original owner THUS lifetime hybrid battery warranty). June 2026 different Hyundai dealer for repair of AC and PA186 code. NEW Hyundai dealer says AC issue is NOT related to the PA186 code. They still dont know what PA186 code is but want to charge me $5100 for engine wiring harness electrical short. SIDE NOTE!! Engine wiring harness electrical short is known issue for ABS module recall 251 for this car. Hyundai has denied the engine wiring harness electrical short repair as part of ABS recall 251 warranty and STILL cant tell me why Hybrid System Warning Lights and PA186 code is come on. Is electrical issue really harness or HYBRID battery?? Car is currently at Hyundai dealer.
2012 Hyundai Sonata Hybrid electrical problems
23 complaints (15% of all complaints for this car). Typical mileage when it fails: 70,000.
- owner complaints
- 23
- of this car's complaints
- 15%
- typical mileage
- 70,000
- crashes
- 0
- recalls
- 0
Which part fails
- 12v/24v/48v battery1
At what mileage
Complaints by mileage at the time of the problem.
Hyundai Sonata Hybrid electrical problems in other years
Specific symptoms reported on the 2012 Hyundai Sonata Hybrid electrical
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Related recalls
No recalls on record for this model year.
Related investigations
Pedestrian alert sounds
the federal safety agency received a petition on or about July 18, 2022, requesting that Federal Motor Vehicle Safety Standard (FMVSS) 141 be applied to all electric and hybrid vehicles operating in the United States. The petition can be reviewed at under ODI Number 11486072. FMVSS 141 establishes performance requirements for pedestrian alert sounds for motor vehicles. The standard applies to hybrid and electric vehicles that have a gross vehicle weight rating of 4,536 KG or less or are defined as low-speed vehicles. The standard became fully applicable to all such vehicles manufactured on or after March 1, 2021.On January 27, 2023, the federal safety agency opened Defect Petition (DP) 22-005 to evaluate the subject matter described in the petition. On June 24, 2023 and as supplemented on June 25, 2023, the petitioner notified the federal safety agency he was withdrawing his petition. The petitioner indicated that, based on his review of data, there is no justification for asserting potential benefits that could be derived from actions sought by my petition. Based on the petitioner's withdrawal, DP22-005 is closed. Closure of this DP does not represent a determination by the federal safety agency regarding the subject matter of the petition.
DP22005
Non-crash Vehicle Fires
During this Preliminary Evaluation (PE), the Office of Defects Investigation (ODI) assessed the scope, frequency and potential safety-related consequences of non-crash vehicle fires caused by both engine failures and failures of other vehicle systems/components in model year (MY) 2011-2014 Hyundai Sonata and Santa Fe vehicles equipped with Theta II and Lambda II engines (approximately 1.3 million vehicles). ODI also reviewed field data of other Hyundai vehicles equipped with Theta II, Gamma, Nu and Lambda engines (approximately 4.8 million). As a result of this PE, Hyundai has issued the federal safety agency Recalls 20V‑746 and 21V‑727 to address potential engine failures and fires in certain Hyundai vehicles equipped with various engine types. Additional information on these and other related recall actions is available in the downloadable version of this resume available at In addition, ODI has upgraded this PE to an Engineering Analysis (EA) 21-003 which will focus on potential recall scope concerns and recall remedy concerns related to the engine failure rewlated recalls mentioned above and conducted previously. See the EA21-003 Opening Resume available at for more information. Also available in the downloadable version of this resume is a list of the reference numbers for the 302 ODI reports, or Vehicle Owner Questionnaires (VOQs), cited above which ODI received through mid-November 2021. Note that the Manufacturer reports cited above are customer complaints received through March 2019.
PE19003
Non-crash Vehicle Fires
In a letter dated June 11, 2018, the Center for Auto Safety (CAS) petitioned the federal safety agency to initiate a safety defect investigation into non-collision related fires on model year (MY) 2011-2014 Kia Optima and Sorento, and Hyundai Sonata and Santa Fe vehicles. In a letter dated July 24, 2018, CAS requested that MY 2010-2015 Kia Soul vehicles be added to the petition. CAS stated that there is a higher number of complaints to the federal safety agency regarding non-crash fires on these vehicles compared to other similar vehicles. The Office of Defects Investigation (ODI) had already opened Recall Queries (RQ17-003 and RQ17-004) on all Kia and Hyundai vehicles equipped with Theta II engines for engine failures that may cause stalling and fires.The queries cover most of the petition subject Optima, Sorento, Sonata, and Santa Fe vehicles but not any of the subject Soul vehicles.On August 21, 2018, ODI opened a Defect Petition (DP18-003) to evaluate whether to grant or deny the CAS petition. ODI sent Information Request letters to Kia and Hyundai (September and October 2018) requesting information on all engine and non-engine related fires in the petition vehicles.ODI performed extensive analysis on the information obtained from Kia and Hyundai. During the DP18-003 analysis, Kia and Hyundai each initiated three additional safety recalls related to engine compartment fires on certain petitioned and non-petitioned vehicles (nearly 740,000 total vehicles: Recalls 18V‑907, 18V‑934, 19V‑101, 19V‑063, 19V‑120, and 19V‑204). Based on ODI?s review of the applicable materials, including responses to Information Requests sent to multiple manufacturers, Vehicle Owner Questionnaires (VOQ), and Early Warning Data, the federal safety agency decided to grant the petition.The CAS petition was granted on March 29, 2019. Preliminary Evaluations (PE19-003 on Hyundai and PE19-004 on Kia) have been opened to assess the scope, frequency, and potential safety-related consequences of alleged defects relating to non-collision vehicle fires in the 2011-2014 Kia Optima and Sorento, 2011-2014 Hyundai Sonata and Santa Fe, and 2010-2015 Kia Soul.Attached is a list of the reference numbers for the 404 VOQs cited above.
DP18003
What 2012 Hyundai Sonata Hybrid owners say
Most recent owner complaints, unedited.
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.
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.
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.
Takata recall: I have a 2012 hyundai sonata 2.0t se and my car stopped in the middle of the road with no warning and would not start back. Now my eps, oil, mil, battery light ate on and car will not crank. I was driving up troy highway in montgomery al when my car begin to slow down and cut off. It did make a clunk noise before it shut off.. There wasn't any fire but engine will not start and just had oil change on friday.
Was backing out of the driveway and the check brake warning started going off. The brake pedal went to the floor. The whole system of the car shut down. My hydraulic unit failed and they will not cover it under warranty. Thank god I wasn't driving when this happened.
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.
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. 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.
In september 2015 the trans. Was replaced in the car. The car was kept for 1 week for repairs.I replaced a battery 12/13/2016, and have had to have at least 12 battery problems. The radio will go out, and within a week to 2 the battery is dead, resulting in my insurance company coming out to start my car. On may 1, 2017, I had a diagnostic done, and they could not find a problem. They recommended trying to replace the radio,but were not sure it would correct the problem. A radio was purchased/replaced 8/2/17,and the problem has continued. Below are the dates of occurrences: 9/14/15-transmission- car went out while driving on highway dead battery: 1/22/16 7/30/16 10/2/16 10/13/16 12/11/16 4/30/17 7/30/17 10/16/17 1/2/18 4/18/18 I have a copy of all claim forms.
Questions about the 2012 Hyundai Sonata Hybrid electrical
Does the 2012 Hyundai Sonata Hybrid have electrical problems?
Owners have filed 23 complaints about the electrical of the 2012 Hyundai Sonata Hybrid, 15% of all its complaints.
At what mileage do 2012 Hyundai Sonata Hybrid electrical problems start?
The typical (median) mileage in owner complaints is 70,000 miles.
Was there a recall on the 2012 Hyundai Sonata Hybrid electrical?
There is no recall for this problem on this model year.
What year does the Hyundai Sonata Hybrid have the most electrical problems?
The Hyundai Sonata Hybrid model years with the most electrical complaints are 2016 (36 complaints), 2021 (25 complaints) and 2013 (24 complaints).
Other 2012 Hyundai Sonata Hybrid problems
Engine 71Transmission 31Brakes 25Acceleration 13Steering 10Fuel system 8Body 4Visibility 4Airbags 3Driver assistance 3Lights 2Seat belts 2Wheels 2Locks 1Seats 1
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