how do i fix the problem with the camshaft positioning sensor in my 98 saturn sl?

What is the exact code you are getting?

Just to add to this one they dont use a cam sensor in that engine so you getting a code P0340 or a P0341?Most of the time those codes are caused by carbon tracking on the spark plugs and wire ends where they meet the plugs.Inspect inside the boot area where the spark plug goes on the plug with a bright flash light.Look and see if you see a black carbon powder?Also inspect the outside of the spark plug for black carbon or carbon tracking where the spark is firing down the side of the plug leaving a burn mark.Also if you replace the spark plugs dont get the platnuim ones they carbon foul in those engines.Use stock copper ngk plugs also get some good wires like ac delco bosch or nipon desno wires.Let us know what you find and what codes you have.