2010, 2009 Toyota Corolla setting correct timing chain marks clears P0017 or P0016 engine code.

this video shows the correct timing chain position on the intake and exhaust cams. The end of the video I tried to show the crankshaft position at TDC at 0 degrees. If one tooth is out on the timing chain the timing will be out and you can get a P0017 or P0016 code.