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: 90,749 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, 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.
Visitor, 2007 Hyundai Sonata, 3.3L V6
Had gas pedal replaced twice. This will be the third time. Car has only 38000 miles
Visitor, 2007 Hyundai Sonata, 3.3L V6, 70,000 mi
ESL light and check engine lights keep going on and off.
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.
Visitor, 2006 Hyundai Sonata, 3.3L V6, 97,000 mi
I was in stop and go traffic and could barely accelerate. After I turned the car off and on again it was fine. The ESC light and check engine light both came on. The check engine light remained on. I am being quoted $500 to replace the gas pedal.