This code can be set for a couple different reasons. If the distributor has been removed, chances are it was not reinstalled properly. If it has not been removed then it it could be a worn distributor gear. This can be checked by taking of the distributor cap and turning the rotor back and forth, it should have very little play. The cam sensor is on the distributor, this is what the plug on the back goes to. Here is the diagnosis procedure for this code. If you need more info, just ask.
The procedure is easy but you need a scanner that will display the cam retard offset. You basically start the engine and hold it at 1000 rpms. If the cam retard offset is more than +2 or -2 degrees, turn the engine off, loosen the distributor hold down bolt, and turn the distributor a little. Then recheck the cam retard offset. Keep repeating this until you get it as close to 0 as possible. Here is the procedure.
Camshaft Retard Offset Adjustment Test Procedure
You cannot adjust the ignition timing. You may need to adjust the distributor in order to prevent crossfire. To insure proper alignment of the distributor, perform the following:
Important: The Cam Retard Offset reading will not be accurate below 1,000 RPM.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten Tighten the bolt to 3 N·m (25 lb ft).