2004-2005 Kawasaki STX-15F Jet Ski Factory Service Manual., Page 91Get this manual

FUEL SYSTEM (DFI) 3-43 Camshaft Position Sensor (Service CodeCharacter-23CAAg)
C Po Se ns Ren
The camshaft position sensor detects the position of the camshaft, and distinguishes the cylinderSee the Ignition system section in Electric System chapter

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