I have Mazda 3 2004 diesel. Power steering light on. When the light turns on, I turn off the engine and start again, and the light goes, but after a while, it turns on automatically again, specially when I turn the wheel al the way to the end. Do I need to change the fluid or do I need to add more fluid? I also want to know what type of fluid should I put for my car mazda 3 2004 diesel. Or is it some other issue?