NHTSA Complaint #11242346 — 2012 HYUNDAI SONATA

2012 HYUNDAI SONATA HYBRID HAS BEEN EXPERIENCING ROUGH TRANSMISSION OPERATION AFTER SOFTWARE UPDATE SERVICE WAS COMPLETED FOR THE CAR AT A DEALERSHIP. THE SOFTWARE UPDATE TO THE CAR COMPUTER SYSTEM WAS KNOW AS "SERVICE CAMPAIGN 953" (KNOCK SENSOR DETECTION SYSTEM - ENGINE MONITORING TECHNOLOGY). EVER SINCE THE CAR COMPUTER SYSTEM WAS UPDATED, THE TRANSMISSION HAS BEEN OPERATING VERY ROUGH. THE CAR STARTED JERKING WHEN IN MOTION AND THE ENGINE WOULD RACE WHEN I STEPPED ON THE ACCELERATOR. ALSO, THE SERVICE LIGHT ON DASHBOARD ILLUMINATES. WHEN L CALLED THE DEALERSHIP AND REPORTED THE TRANSMISSION HESITATION PROBLEM, THEY TRIED TO FIX THE ISSUE BY RUNNING DIAGNOSTIC TESTS AND REPLACING THE ESC RELAY. ALL DID NOT SOLVE THE PROBLEM. LATER, L WAS TOLD THERE WAS NOTHING THEY CAN DO ABOUT ABOUT IT, UNLESS AM READY TO TAKE CARE OF THE EXPENSES (DIAGNOSIS AND MECHANICAL), BECAUSE THE CAR IS OUT OF WARRANTY DUE TO MILEAGE. I TOLD THEM THE CAR TRANSMISSION WAS OPERATING SMOOTHLY UNTIL AFTER THE SOFTWARE UPDATE WAS APPLIED TO THE CAR COMPUTER SYSTEM. AS OF RIGHT NOW, I BELIEVE THE SOFTWARE SERVICE TO THE CAR HAS CAUSED THIS CHANGES IN THE TRANSMISSION. I ALSO THINK, THE DEALERSHIP SHOULD HAVE WORKED ON FIXING THE ISSUES ON MY CAR REGARDING THE SOFTWARE SERVICE UPDATE. I WANT TO THIS ISSUE TO BE CRITICALLY LOOKED INTO, SINCE THERE MAY BE MANY OUT THERE WITH HYUNDAI SONATA TRANSMISSION PREDICAMENT.