Material In Cylinder
WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Some causes of this include broken valve, piston material, foreign material, or cracked cylinder wall.
Inspect cylinder for damaged components and/or foreign materials. Inspect for fallen cylinder wall. Repair or replace as required.