Crankshaft Position (CKP) Sensor
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. However, it is still accessible from the selected car via links, so may be relevant.
The CKP sensor detects crankshaft speed and is used by the PCM to determine ignition timing, timing for the fuel injection of each cylinder, and engine misfire detection.
Courtesy of AMERICAN HONDA MOTOR CO., INC.