Circuit Description
WARNING: This page is about a different car, the 2003 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
The DTC P0335 Crankshaft Position (CKP) sensor circuit diagnostic monitors the signal from CKP sensor. CKP sensor is a magnetic generator type sensor, producing an alternating current signal. CKP sensor signal increases in both frequency and amplitude as engine RPM increases. CKP sensor sends this reference signal to the Powertrain Control Module (PCM) to indicate crankshaft RPM and position. This reference signal is used by PCM to calculate fuel injection pulse, establish Top Dead Center (TDC) for ignition timing and where to start ignition coil and injection sequencing. There will be no spark or fuel delivery if there is no CKP sensor signal.