I have been having troubles with my EPS and the problem has been very intermittent. It will be working one day - then later in the day if i turn the car on/off it will shut off. After it shuts off and turns back on it will then go crazy - like it is trying to calibrate. The previous owner had the alternator replaced. What should be my line of attack for this problem? Starting with the easiest/cheapest then progressive to replacing the module/motor. The car is amazing otherwise. I just am not sure where to start then where to go after that. Battery first? Thank you.