Here is the problem. As I am cruising along and have to slow down for a stop sign or stop light or for the grandma crossing the street, I let off the gas and let it coast for a little bit. As I do that, the car sometimes jerks back and forth a little. Not too violently but enough to get me angry. I am wondering if this could be caused by the O2 sensor, as the sensor light came on last week. Any ideas? I dont know how to describe it better.