2009 Hyundai Sonata: adaptive cruise control problems

Filed Jul 21, 2021 · IL

None of my lights on my dash has changed. Areas affected: Service Brakes, Hydraulics, and exterior lighting, Failure to illuminate the stop lamps during braking or inability to engaged the cruise control could increase the risk of a crash. As mentioned in the recall from 4/1/13. 2nd recall For Suspension: control arm separation May suddenly changed the rear wheel alignment affecting the handling of the car increasing the risk of a crash. Another main common issue is The rusted out subframe, lower control arms, cam bolts, bushings, control arm, subframe, and sway bar. This is causing me to drive unstable and hold the steering wheel forcefully in order to remain straight.

Filed Oct 30, 2017 · Driver assistance · 130,000 miles · UT

Esc light illuminates once the car is started and cannot be turned off by depressing the switch, this also seems to disable the cruise control.

Filed Aug 31, 2014 · Driver assistance · 110,000 miles · FL

The ESC has turned off (dash light comes on) at various times. Previously my brake switch was an issue and my cruise control would not disconnect by tapping the brake. I had that replaced a few years ago. Now, the ESC turns off after 30 minutes of driving. If I turn the car off, it is fine for about 30 minutes. Also, periodically, I press the volume adjustment on the steering wheel and it does the opposite ... In other words, I press volume down and the volume actually goes up. The electronics seem to be very messed up...

Filed Sep 10, 2013 · Acceleration, Brakes · 62,000 miles · NH

Basically it appears that I'm having the same brake switch issue common with many hyundais. However, currently the '09 sonata is not covered under any recall. The problem began at least a year ago when the ESC off light would turn on at random times. It would normally clear upon turning the car off. A few days ago the ESC off light would not turn off. Today I could not shift into park from drive. After searching the internet I quickly found the brake switch issue. I confirmed that my brake lights were not functional. This is something occurs with absolutely no warning which is a bit scary since I drive home on a major highway. I'm not sure how long the brake lights had been out. I also noticed that the cruise control stopped functioning when the ESC off light became permanent. However, for some reason it started working again when the shift lock problem occurred. Odd. Not sure why an additional issue would make the speed control functional again.

Filed Aug 15, 2013 · Electrical, Lights · 92,323 miles · SC

My ESC off and check engine lights came on. My mechanic indicated it was due to a bad brake light switch as my rear brake lights and cruise control did not work. He replaced the brake light switch but a couple days later the check engine light came back on. The computer listed a different code, stating the brake light switch is not compatible, but the rear brake lights work off and on. Awaiting follow up with my mechanic as he was going to check with hyundai.

Filed Jul 12, 2013 · Brakes, Driver assistance · 68,500 miles · FL

Driving on the interstate, 'ESC off' light came on; at the same time, the cruise control quit working and I noticed that the brake lights all quit working at the same time.

Filed May 15, 2010 · Acceleration · 33,000 miles · NY

2009 hyundai sonata limited 4 cyl. While cruise control was on, when resuming speed after slowing down for traffic, car continued on thru set resume speed (70) to 80+. Control reestablished by shutting off cruise control. This did not happen every times but it did happen multiple times, mar. 12 - 14, 2010. It had not occurred before. We have not used cruise control since. Dealer could not replicate. Unresolved.

Filed Jul 22, 2009 · Acceleration · 16,000 miles · NY

Tl*the contact owns a 2009 hyundai sonata. While driving 50 MPH downhill with the cruise control engaged, the vehicle accelerated up to 80 MPH. The dealer test drove the vehicle and confirmed the failure, but stated that nothing could be done to correct the issue. The contact called hyundai customer support and they also could not assist. He believes that driving the vehicle would be a safety risk due to the manufacturer defect. He also believes that a recall should be issued as well as a remedy for the failure. The contact discovered other consumers that were experiencing the same issue with the same type of vehicle. The failure mileage was 16,000 and current mileage was 17,000. Updated 10/06/09. *lj updated 10/08/09.