11 problems related to other fuel system have been reported for the 2009 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Hyundai Sonata based on all problems reported for the 2009 Sonata.
Stalls randomly and intermittently anytime and at any speed without warning. It happens while cruising on a freeway or stopped on a light.
While driving on a freeway at approximately 70mph, my Sonata stopped accelerating. I had to pull off the road in the middle of traffic as my car was rapidly decelerating. I turned off the ignition, and after letting it set for a few minutes, I was able to start up again and proceed without trouble. This has happened three times in since, both on a freeway and once on a side street. I am on my way to my dealer today to check this out. Also, I have checked the internet, and found that this is a common occurrence among these models.
!) check engine light has been on for almost a year. . Shop said it was a gas cap problem. . Bought new cap, not fixed. . Still on 2) filling car up with gas. . . . Very difficult to fill. . . Knob keeps shutting off gas flow. . . . Once again shop has no good answer. . . . . .
After I start my car and drive it for less than one mile, my car will stall when I take my foot off of the gas pedal to slow down or stop. This usually happens when I slow/stop the car for the first time after starting.
Some times when starting the car with my foot on the brake the rpms go up to about 1200 and then down to 800 rpms. When my foot is removed from the brake the car wants to accelerate and go on its own often. While stoped at a stop sign or stoped with my foot on the brake the car will lurch forward when released, some times spinning the tires. It is progressively getting worse after returning from a 5000 mile trip in June, 2013. The car purchased new and has a automatic transmission with aprox. 65000 miles total on the car. This is a accident waiting to happen and should have a recall.
The check engine light came on. When this happened,it became very difficult to pump gas. When I am pumping the gas it backs up and splashes back out the opening. I have to pump very slowly and a little at the time. At times it can take over 15 minutes must to get 10 gallon. I've run into other people at the pump that have told me that they had the experience.
Strange gas smell when car is turned on and off. Specially after ridding vehicle and stopping car for a few and restarting. The smell comes thru air vents. Took vehicle to dealer and they stated nothing shows up in their computer. Mpg has dropped to around 24 on highway and city to around 16 mpg and this is a 4 cylinder vehicle. Have been doing some research and have located several sites stating same problem.
While driving on the interstate in traffic, the check engine light and esc light came on and it was like the gas doesn't want to go to the engine but the car didn't die and moved at no more than 5 miles an hour. This has happened several times over the past4 months and it really hasn't been an issue because normally you can shut the car off for about an hour and turn it back on and it's fine, however it is a major issue if you are unable to get your vehicle to the side of the freeway and out of harms way. It has occurred over 4 times and it has recently happened twice in one week. I took it to the dealership and they stated that Hyundai is aware of this issue and owners can either pay to get the sensor "box" cleaned out, or repaired which costs in the area of $500. 00. They know it is the sensor "box", and that is is flawed. Why should the consumer have to pay for a defect from the manufacturer.
Noticed the car does not pull up the steep hill very well. Took to dealer who said transmission oil is dirty and smells bad and it needs transmission flush, resetting of transmission shift points, and fuel system clean . I pointed out these are not per scheduled maintenance requirement and was concerned the car was causing these problems so early in its usage . Will take it for the transmission flush as that is what dealer insists on before they inform me if there is a safety issue present.
The contact owns a 2009 Hyundai Sonata. The contact stated that while refueling, fuel started to spew out of the filler neck. The vehicle was taken to an independent mechanic where the technician diagnosed that the vent valve canister and filter needed to be replaced. The vehicle was repaired however, two years later the failure recurred. The manufacturer was made aware of the failure. The vehicle was not repaired. The failure mileage was 102,000 and the current mileage was 125,000.
When filling the vehicle with gas it always spills out as if something is blocking the input of gasoline. I would consider this a hazard/safety issue. Many gas station attendants have told me this is a problem they see with most Hyundai Sonatas possibly of the same year? I've contacted Hyundai and they want nothing to do with this. They want you to jump through hoops to have it repaired.