I have a 2003 nissan sunny motorcar, the problem i am having is that, at times the engine check light comes on, and when this happens it barely moves, doesnt rev out and the transmission jumps into the first change, but doesnt change any more time after the first change. i had recently done some repairs on the said transmission. i also notice that the transmission fluid was very low when i started having this problem. when the car starts also i notice that the od/off light blinks for sometime before it goes out.could you kindly assist me as to what might be the problem with my car.