Location: The Crankshaft Position Sensor may be located behind the harmonic balance on the front of the crankshaft, inserted into the transmission bell housing or directly into the engine block at the crankshaft level What It Does: The Crankshaft Position Sensor is required by the computer to locate the crankshaft position which is used by the computer for ignition timing and fuel injection timing control Failure Symptoms: Malfunction Indicator Light illumination, engine no-start/no-spark condition, occasional cylinder misfire, engine die-out or no-start after extended driving condition with an engine re-start after a cool down period