Ok i am getting code 64, and if i am right that is a oxygen sensor is reading lean. sure enough i looked at my O2's on my scanmaster and the one side is reading lean while off the throttle and stays lean ( other one deosn't do that) is it just bad O2's? or is it something more serious? i recently seafoamed my engine threw the intake and in the gas tank. could this be the cause? what is my next step on fixing this? thanks........

 

Seafoam has a bad rep for frying O2 sensors, so that's probably your problem.

Just to be sure though, take the O2's out and switch them. If the problem follows the sensor, then the sensor is at fault. If it stays on the right side, then it could possibly be an exhaust leak that's causing the readings to be off.