Service Brakes Problems of Hyundai Sonata Hybrid - part 1

• the engine hybrid electrical network & anti lock braking system (abs) failed. The independent scan confirmed codes p136 (engine knock signal) u2093/u1004 ( hybrid control module communication loss) and c1614 (abs can timeout). The vehicle is fully available upon request. • while driving at highway speeds on the freeway every single light on the dashboard suddenly lit up all at once & the vehicle immediately starting loading acceleration & propulsion power. This sudden loss of speed on a active freeway created a immediate severe hazard of a of a high speed for myself & other motorists. • yes, the electronic faults components have been confirmed & documented by an independent service center (oreilly auto parts veriscan diagnostic report. 05621260920003155). • no the vehicle hasn’t been inspected by the manufacturer, police , or the insurance representatives. • there were no symptoms or warning lamps prior to the failure everything happened instantly while driving on the freeway when the entire dashboard illuminated at once & the power was lost the physical odometer reads exactly 138,764( (note the third party scanner printout manually estimated 152,000 due to a tool discrepancy but the true mileage is 138,764.

See all problems of the 2014 Hyundai Sonata Hybrid 🔎.

I was driving through a high school pick-up line where traffic was moving slowly. My vehicle was operating on adaptive cruise control, and I had my foot resting on the brake in case I needed to stop. A woman was about to cross the street, so I tapped the brakes. The vehicle did not slow down as it should have and instead began accelerating. I immediately pressed down on the brakes as hard as I could, but the vehicle continued accelerating and did not respond to my braking. There were vehicles stopped in front of me, so I attempted to steer around the vehicle directly in front of me to avoid a direct collision. The vehicle continued forward and collided with two other vehicles before coming to a stop after striking a wall. Based on what I experienced, both the adaptive/assistive cruise control and the vehicle’s braking response failed during this incident. Prior to the incident, the vehicle had been operating normally, with no warning lights, error messages, or other symptoms indicating a problem. Police and paramedics responded to the scene. I was not issued a citation. A police report was completed, and my insurance company, dealership, and lien holder have been notified. There were multiple witnesses to the incident. The vehicle remains available for inspection at the tow yard listed above.

The contact owns a 2013 Hyundai sonata. The contact stated that while driving 40 mph, the malfunction indicator and coolant temperature warning lights illuminated, and the engine overheated and shuddered abnormally. There was smoke and an abnormal ticking sound coming from underneath the hood of the vehicle. The contact was able to pull into a parking lot, and the vehicle was turned off. The contact became aware that the VIN was included in NHTSA campaign number: 23v651000 (service brakes, hydraulic). The vehicle was not diagnosed or repaired by a dealer or an independent mechanic. The manufacturer was not notified of the failure. The failure mileage was approximately 147,000.

See all problems of the 2013 Hyundai Sonata Hybrid 🔎.

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.

See all problems of the 2012 Hyundai Sonata Hybrid 🔎.

While traveling 40 mph, car flashes a warning, "check hybrid system", and then the car shuts off. No power steering and brakes are difficult. The warning is only 3-5 seconds before everything shuts down. This is definitely a hazard to myself and others. If in traffic at higher speeds, there would certainly be an accident with devastating results.

See all problems of the 2017 Hyundai Sonata Hybrid 🔎.

The vehicle’s abs system is engaging autonomously, causing the car to brake without any driver input. The dealer stated it was: brake actuation unit and hydraulic power unit bleeding and programing.

The contact owns a 2015 Hyundai Sonata Hybrid. The contact stated that while driving 5 mph and making a left turn, the vehicle made an abnormal knocking sound. The contact stated that upon pulling into an apartment complex parking lot, the contact noticed that there was smoke coming out from underneath the hood. There was no warning light illuminated. The contact immediately parked and exited the vehicle. The contact stated that upon opening the hood, the contact noticed a small fire and was able to extinguish the fire with a water bottle. The contact was able to push the vehicle into a parking space with the assistance of her son. There was no injury sustained. No police report was filed. The vehicle was towed to an independent mechanic, where it was diagnosed that a fluid leak from an unknown hose had caused the fire, and there was a hole in the engine block. The contact also stated that there was a puddle of fluid on the ground. The vehicle was not repaired. The contact became aware that the VIN was included in NHTSA campaign number: 23v651000(service brakes, hydraulic), which the contact related to the failure. The dealer and the manufacturer were not notified of the failure. The failure mileage was approximately 115,395.

See all problems of the 2015 Hyundai Sonata Hybrid 🔎.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact stated while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. Additionally, the abs warning light was illuminated. The contact stated that the vehicle had to be turned off and restarted every ten minutes. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The contact stated that the vehicle was recently serviced by the dealer and NHTSA campaign number: 23v651000 (service brakes, hydraulic) was completed. The contact stated that the failure was present prior to the recall repair being performed. In addition, the contact stated that the failure reoccurred a week after the recall repair was completed. The manufacturer was not made aware of the failure. The failure mileage was approximately 130,000.

The contact owns a 2014 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The contact stated that while attempting to start the vehicle the brake pedal went to the floorboard. The contact replaced the brake pads; however, the failure persisted. The dealer was made aware of the failure and confirmed that parts were not yet available. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 172,453. Parts distribution disconnect.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact stated while driving at an undisclosed speed, the brakes became inoperable. There were no warning lights illuminated. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The approximate failure mileage was 155,290. Parts distribution disconnect.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact stated that while driving at an undisclosed speed, the brake warning light illuminated. The contact pulled over on the side of the road and vehicle was towed to the dealer to be diagnosed. The contact was informed that the abs and hydraulic pump needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA campaign number: 23v651000 (service brakes, hydraulic) that was previously performed. The manufacturer was made aware of the failure and informed the contact the failure was not related to the recall repair. The failure mileage was approximately 151,020.

The contact owns a 2011 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

See all problems of the 2011 Hyundai Sonata Hybrid 🔎.

The contact owns a 2016 Hyundai sonata. The contact stated that while driving 70 mph, the vehicle went into limp mode and decelerated. The check engine warning light and the battery warning light were illuminated. The failure was a recurring failure. The vehicle was towed to the first dealer, and the contact was informed that an oil change was needed. The failure persisted, and the vehicle was taken to another dealer and was diagnosed and dtc: c222908; was retrieved. The manufacturer was contacted by phone and made aware of the failure. The failure mileage was approximately 88,385.

See all problems of the 2016 Hyundai Sonata Hybrid 🔎.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) and would like to be removed from the recall distribution list because she no longer owns the vehicle. The local dealer was contacted. The manufacturer was not contacted.

The contact owns a 2014 Hyundai Sonata Hybrid. The contact received notification NHTSA campaign number: 23v651000 (service brakes, hydraulics) however, the parts to do the repair were not available. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repairs as the recall notice was received several months ago. The local dealer was notified of the recall notice and confirmed that the parts were not available for the recall remedy. The manufacturer was not notified of the issue. The contact had not experienced a failure, but did receive notice of vehicle included in the recall. VIN tool shows 0 unrepaired recalls.

The contact owns a 2011 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The local dealer was not contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2015 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue. The manufacturer was made aware of the issue and confirmed that parts were not yet available. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2015 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The local dealer was made aware of the issue and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic). The contact stated that when the vehicle was started, the check brake and hybrid system message was displayed. Additionally, the contact stated that while driving at various speeds on several occasions, the abs activated inadvertently. The vehicle was taken to a dealer where it was determined that unknown parts needed to be replaced; however, the parts were unavailable. The manufacturer was not notified of the failure. The failure mileage was approximately 126,000.

The contact owns a 2013 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The local dealer was made aware of the issue and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The contact stated that while driving at an undisclosed speed, the check brakes and hybrid system warning: safely stop and do not drive messages were displayed. The brakes then made a grinding sound while the brake pedal was depressed. Additionally, the vehicle lost motive power while driving. The contact pulled over and restarted the vehicle. The vehicle was taken to the dealer, where it was diagnosed with a faulty hcu (hybrid control unit) and ahb (active hydraulic boost). The dealer retrieved dtc codes: p1886 (inappropriate and low soc) and c1237: (primary pressure sensor signal). The dealer replaced the oil valve gasket and recalibrated the brakes. The manufacturer was made aware of the failure. The failure mileage was approximately 113,340. VIN tool confirms parts not available.

The contact owns a 2013 Hyundai Sonata Hybrid. The contact stated while driving at an undisclosed speed and attempting to stop the vehicle, he heard an abnormal sound coming from the front of the vehicle. The service brake warning light was illuminated. The vehicle was taken to the dealer, who diagnosed a failure with the hydraulic power unit. The vehicle was not repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 125,000.

The contact owns a 2015 Hyundai Sonata Hybrid. The contact stated while stopped in traffic, the vehicle independently jolted with a message indicating a hybrid system safety failure. Additionally, there was a message to stop driving the vehicle with an alarm sounding. The contact veered to the side of the road. The contact was able to continue driving. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) the following day; however, the part to do the recall repair was not yet available. The contact stated that the failure recurred while driving. The contact veered to the side of the road. The vehicle was then taken to an independent mechanic, where it was test-driven; however, the mechanic was unable to duplicate the failure. The local dealer was contacted and informed the contact that the earliest availability was on December 23, 2023. The vehicle was not diagnosed or repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the failure. The failure mileage was approximately 97,500. VIN tool confirms parts not available.

The contact owns a 2014 Hyundai Sonata Hybrid. The contact stated that while operating the vehicle, the message "brake system malfunction - vehicle will turn off for safety" was displayed on the instrument panel and the vehicle turned off. The vehicle was towed to the local dealer who determined that the abs module was faulty and needed to be replaced. The vehicle was not yet repaired. The manufacturer was notified of the failure, but no assistance was offered. The contact was informed that the VIN was included in the NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the remedy was not yet available and did not include replacement of the abs module. The failure mileage was 160,000.

The contact owns a 2013 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was contacted. The manufacturer was made not aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2014 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact called another local dealer, red mccombs Hyundai northwest, (13663 I-10, san antonio, TX 78249) who informed the contact that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.

The contact owns a 2013 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The local dealer was contacted, and it was confirmed that the part was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact stated while driving approximately 45 mph, there was smoke coming from the engine compartment before the vehicle stalled. The vehicle was towed to the local dealer. The vehicle was not yet repaired. The failure mileage was 145,000. Parts distribution disconnect.

The contact owns a 2013 Hyundai Sonata Hybrid. The contact stated while driving at an undisclosed speed, the vehicle hesitated. There was no warning light illuminated. The vehicle was taken to an auto zone where it was placed on a diagnostic machine and produced an undisclosed code indicating that the hecu was faulty. The vehicle was then taken to the dealer where it was then determined that the hydraulic electronic control unit (hecu) failed and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure and the contact was provided a case number, but no further assistance was provided. The failure mileage was approximately 90,000.

The contact owns a 2012 Hyundai Sonata Hybrid. The contact received notification of NHTSA campaign number: 23v651000 (service brakes, hydraulic) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. The contact had not experienced a failure. Parts distribution disconnect.

The contact owns a 2017 Hyundai Sonata Hybrid. The contact stated that the vehicle was taken to a kia dealer for oil change and brake fluid flush; however, upon test driving the vehicle after the service, the brake pedal was depressed but went to the floorboard, and the vehicle responded with a significant delay. The kia dealer was notified of the failure, but the vehicle was not repaired. The contact stated that the failure persisted while driving. There was no warning light illuminated. Additionally, the contact stated that the kia dealer had diagnosed that the parking brake was inoperable. The vehicle was not repaired. The manufacturer was notified of the failure. The failure mileage was approximately 52,000.

The contact owns a 2011 Hyundai Sonata Hybrid. The contact stated that upon retrieving the vehicle from the local dealer after a recall repair, the brakes were inoperable. There were no warning lights illuminated. The vehicle was taken to the local dealer, where a diagnostic test was completed. The vehicle was repaired, but the failure recurred. The manufacturer was not contacted. The failure mileage was unknown.

Year: 2011 VIN: kmhec4a49ba004191 few days ago change new part and installation 6/28/2019 changing the brake abs assy in millennium Hyundai service center but still have problems check brake warning again my Hyundai Sonata Hybrid. When driving the check brake signal comes on and shuts down the car and render it drive less until I shut off the engine and restart it . We still have the same problem check brake signal come on.