Power steering randomly fails while driving. this happened while turning into a parking space, on residential street and the expressway. the car has been at the dealership 4 times since june 3 for the same issue. the first time the following repairs were performed: replaced complete rack & pinion gear with power steering control module reinstalled, download for power steering module. did not fix the problem. second time the following repairs were performed: downloaded power steering control module before replacing module. replaced rack & pinion, re-download power steering control module. this did not fix the problem. in addition to the power steering failing, the car also shut off twice, once while in park and the second time while in drive at an intersection. third time the car was at the dealership a configuration error fault code in pscm was found. following repairs were performed: reset steering angle sensor values, several times. power steering went out, took the car back to the dealership. the fourth time the scan test only showed a radio code, u150k 00 (there is nothing wrong with the radio). the dealership test drove the car for 66 miles and could not get the car to mimic the steering problem. because a lack of steering light and couldn't mimic the problem, no repairs were made.