I have a 99 Pathfinder, and I recently had problems with the distributor, in which I replaced. Now my Check Engine light has come on. My friend looked at it, and didn't find any problems with it, so he reset it. After about a week, the light came back on again. Any suggetions to what the problem may be?? After the distributor was replaced, I still feel my car isn't running as well: it seems a bit "lazy" in changing gears when I am accelerating and the ride is a bit "shaky" at times. I don't know if I am just paranoid, but any informations would help!

Thanks in advance!!

 

BTW: First code was Knock Sensor