P0341 on Saturns is usually caused by an engine misfire (even though the code states that it is for the camshaft sensor). The first thing you need to do is check your spark plugs, wires, etc. If you haven't replaced them recently then you should just do it. It could also be caused by the spark plugs as well.
P0405 is for the EGR system. This particular code is probably caused by the EGR valve itself or a wiring problem. Be sure to check the connections to the valve and the wiring harness.
Tuesday, May 1st, 2012 AT 8:21 PM