DTC P0335: Crankshaft Position Sensor Circuit: Description

WARNING: This page is about a different car, the 2002 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The Crankshaft Position (CKP) sensor produces an AC voltage of different amplitude and frequency depending on the velocity of the crankshaft. The CKP sensor works in conjunction with a 58 tooth reluctor wheel on the crankshaft. Each tooth is spaced six degrees apart with one span having a 12 degree space that is uncut. This uncut portion creates a pattern that enables the ECM to determine top dead center for cylinder No. 1 and its mating cylinder, cylinder No. 4. The Camshaft Position (CMP) sensor is then used to determine when cylinder No. 1 is on its compression stroke. With both CKP sensor and CMP sensor inputs, the ECM can properly synchronize ignition timing, fuel delivery and spark knock control. The ECM uses a pull-up voltage of 2.5 volts on each CKP sensor wire used for the reduction of noise interference from electromagnetic generating devices. DTC P0335 will set if the ECM does not detect a CKP sensor A/C voltage signal, after it has received a certain number of valid camshaft position sensor pulses. This indicates that an open or short to voltage in the CKP sensor circuit is occurring.