Crankshaft Position Sensor
WARNING: This page is about a different car, the 1997 Infiniti I30. However, it is still accessible from the selected car via links, so may be relevant.
ECM depends upon crankshaft position sensor for RPM signals. ECM uses signals to determine triggering of power transistors and fuel injectors. Faults in CKP sensor or circuit should set a Diagnostic Trouble Code (DTC) PO335 or P1336. For testing procedure, refer to DTC PO335 OR P1336 - CRANKSHAFT POSITION (CKP) SENSOR in appropriate TESTS W/CODES article.