Problems with the accelerator pedal position switch may cause the Check Engine Light to illuminate; an improved switch is available to fix this problem.Google+
Car Problem Reports
Hyundai Sonata Check Engine Light Due to Faulty Accelerator Pedal Position Switch
Hyundai Sonata Problem
Engines Affected: 2.0L 4 Cylinder, 2.4L 4 Cylinder, 2.7L V6, 3.3L V6
Average Mileage: 91,548 mi (12,000 mi - 178,000 mi)
Visitor, 2005 Hyundai Sonata, 2.4L 4 Cylinder, 120,000 mi
Pedal will be all the way down to the floor and still only going 20mph and creeping. Every now and then the transmission doesn't know what gear to be in so sometimes it doesn't go to first of 4th gear.
Visitor, 2007 Hyundai Sonata, 3.3L V6, 106,000 mi
I've been having the same problem with the accelerator pedal. I was driving on the parkway, going about 60 MPH, and suddenly the ESC OFF light came on and I couldn't get the car to go above 20 MPH. Very dangerous when driving on a crowded highway. I pulled off to the side and restarted the car. It happened several more times on my drive to work. Taking it to the dealer today.
Visitor, 2006 Hyundai Sonata, 3.3L V6, 50,000 mi
Car won't accelerate faster than 30 mph. Haven't had it fixed yet.
Visitor, 2007 Hyundai Sonata, 3.3L V6, 49,850 mi
while driving, the accelerator pedal suddenly stopped working and the 'check engine' light came on. the engine was still on at idle. i coasted to a stop, turned it off, and restarted. the accelerator started working, but the 'check engine' light is still on. not yet fixed.
Visitor, 2006 Hyundai Sonata, 3.3L V6, 79,000 mi
CEL and ESC light on codes were throttle position sensor. Dealer replaced sensor cost $148.00 total.
Visitor, 2009 Hyundai Sonata, 3.3L V6
While driving the engine malfunction and ESC lights came on and the car lost all power. I coasted to the side of the road and turned the car off, then on. The ESC light went off, but the malfunction light stayed on and continues to stay. The car seems to drive OK.
the car wants to quit every time that we made a stop, and we run a diagnostic and the computer said that was the coil #1 that is wasn't working and also the cap of the gas wasn't good, so we change the coil for a new one, but keeps doing the same thing, also we change the spark plugs, and cables and it keeps doing the same thing, when we stop and want to continue the car startle an it feels that the vehicle is going to quit or when it start moving it fells like it doesn't want to run..
Visitor, 2009 Hyundai Sonata, 2.4L 4 Cylinder, 95,000 mi
Esc light comes on. Car looses power have to turn car of and back on then ok. Dealer says the whole engine needs to be changed.
Check engine light came on; no acceleration; car would not go faster than 20mph; turned it off, waited a while, and it drove normally, but check engine light was still on. Have not had it repaired yet.
Visitor, 2007 Hyundai Sonata, 3.3L V6, 71,000 mi
check engine light comes on. Trouble code (p2135) No power, engine just idles. Turn off the ignition and back on it works fine. Check engine light stays lit for awhile then goes out.