2009 Hyundai Sonata electrical problems

Filed Feb 3, 2026 · Acceleration, Electrical · MO

Passenger seat belt doesn’t click in. Miss fire Poor acceleration Exhaust leak Power lost Mechanic can’t find the problem Check engine light on

Filed Jan 6, 2026 · Brakes, Electrical · NC

Brakes seize up while driving and then cannot move the vehicle. This causes a dangerous situation while driving and then breaks lock up and cannot move car even though vehicle is on and then stopped for a stop light. Car must then be turned off and sit for about 30 minutes so it can unseize and when that happens, you can then resume driving and then check engine light comes on. Brake lights were staying on even when vehicle is shut completely off. ABS and ESC lights stay on consistently and never turn off. Vehicle brake switch was replaced at Carolina Hyundai of high point, NC. So break lights have been repaired. They had to order the stop switch lamp replacement for recall as it was never done and will be fixed in next week. 3 door handles fell off and cannot open the rear driver side door at all. Window electric system won’t let windows go up and down and had to make a latch pull string to open driver door. Passenger door will not open at all and no handle and is a dangerous situation. Break switch not being replaced would have cause an electrical fire and is a complete dangerous vehicle even after being inspected less than a week ago

Filed Sep 3, 2025 · Electrical, Engine · MD

Oil Leak on Alternator Engine leaking oil from the front cylinder bank’s valve cover or from the valve cover’s gasket onto the alternator. An unknown amount of oil damaged the alternator resulting in illumination of the charging system warning lamp and disablement of the charging system. If the vehicle is continually driven with a disabled charging system, the engine can shut off, increasing the risk of a crash.

Filed Sep 3, 2025 · Electrical, Engine · MD

Engine leaking oil from the front cylinder bank’s valve cover or leaking from the valve cover’s gasket onto the alternator. A sufficient amount of oil could damage the alternator resulting in illumination of the charging system warning lamp and disablement of the charging system. If the vehicle is continually driven with a disabled charging system, the engine can shut off, increasing the risk of a crash.

Filed Sep 11, 2023 · Electrical · 184,500 miles · MN

The contact owns a 2009 Hyundai Sonata. The contact stated that while her daughter was driving 60 MPH, the vehicle lost motive power. The contact was able to pull to the shoulder of the roadway, where the vehicle failed to restart. After calling AAA, the technician determined the vehicle had run out of gasoline however, the instrument panel was reading a half tank. No warning lights were illuminated. The vehicle was towed to the dealer, who diagnosed a failure with the instrument panel. The vehicle was not repaired. The manufacturer was notified of the failure but offered no assistance. The failure mileage was 184,500.

Filed Jul 21, 2023 · Electrical · LA

I see that the manufacturer has an "Open Service Campaign" on their Sonata's shark fins. I've taken mine to the local dealership and they want a min. $700 to replace the shark fin. It just came off somewhere (a couple of years ago) and, now, my car has to be jumped off if I let it sit more than two days. I have had it inspected by the dealer and an individual garage. No one would tell me what was draining my battery. I am a senior citizen and fear I will get stranded on the road somewhere. The missing fin lets water into my car, soaking the carpets, etc. Finally, it was suggested that the car cover I keep on it touches the exposed fin components and that's what was draining my battery. It seems that the manufacturer was aware enough of this faulty part to want to prevent complaints by voluntarily replacing problematic parts (thus the service campaign). And, there are a lot of videos on YouTube from DIY folks who've suffered through replacing the shark fins (many different models) themselves. It seems, however, the manufacturer only notified dealers with said "open service campaign," not the public, as in a proper Recall process. That way, they get to make more money off the public when the part falls off? Please advise how one might get the dealers to do the right thing. Thank you.

Filed Mar 26, 2023 · Electrical, Engine · IL

Valve cover gasket leaks and oil leaks on to the alternator which can cause the alternator to fail and the battery to not maintain a charge and the car can stall and then not start. This is the same exact problem problem that is in your recall on 2007-2012 Veracruz Recall number 20V705000 & 14V415000 And 2007-2009 Santa Fe vehicles have the same issue and Service Campaign 936 SB-10058931-4495 (TSB# 15-01-031).

Filed Jul 3, 2022 · Electrical, Transmission · IL

We purchased this vehicle used 9/2022. A week later it began to jump upon accelerating and slowing down. We took it in and they said it was the power train control module and our warranty would not cover it. So it would cost us around $1600. We can’t afford that. We have only driven it a few times since. We were parked in front of a curb and the car accelerated us into a curb. Now, the ESC OFF, ABS, and engine light are illuminated. This is not a. It also wear and tear issues, as I’ve seen many others posting similar experiences. Our car is an ‘09 with almost 90,000 miles on it.

Filed May 26, 2021 · Electrical · CT

All car systems flashed and car went completely dead. Nothing worked. First time it happened mechanic said alternator and battery had to be changed. A year and a half later exact same thing happened and again new mechanic says the alternator needs to be changed. BIG SAFETY ISUUE AS CAR DIED IN THE MIDDLE OF HIGHWAY WITH CARS GOING ALL AROUND ME TRYING TO AVOID ME. This is Second time the alternator has to be replaced with only 2000 miles on the car after the alternator was replaced the first time.

Filed Oct 16, 2020 · Driver assistance, Electrical · 152,000 miles · TX

Was driving on access road and the ESC off light came on and the car started to stall- unable to accelerate. Had to pull to side of the road on wurzbach parkway. Took it to shop and had cam shaft, crankshaft sensors removed and replaced. Had $700 of other work done and car worked great for 2 weeks. Unfortunately today while driving home from ESC off light came on and car was unable to accelerate. Luckily I got to safety but could've been killed if I wasn't so lucky... Pretty ridiculous problem to have especially as so many people are reporting the same problem...