One problem related to software has been reported for the 2009 Hyundai Elantra. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Hyundai Elantra based on all problems reported for the 2009 Elantra.
There were no issues with the car until eps (red) and esc off (yellow) lights came on when the car was started one evening, and in turn the power steering was lost. Vehicle was driven earlier in the day without any problems. It was parked for about 30 minutes or so, and when it was turned on again the lights came on and the steering wheel felt like it was locked. It is very difficult to turn the steering wheel at low speeds. Vehicle was taken to a local Hyundai dealer where error codes c1260, c1604, and c1513 were diagnosed. The dealer performed the steering angle re-calibration and the ecu software update, but the errors persisted. The dealership stated that electronic power steering column and the stop lamp switch needed to be replaced. These exact two parts were a subject of two separate recalls for this vehicle (campaigns # 110 and 127) and were repaired/serviced in 2015 and the recall was closed. It is very strange that both of these parts would fail again without any notice, particularly the electronic power steering column, considering that the car only has 47000 miles and this part was repaired in 2015.