DTC P0300: Engine Misfire Detected: Description

The Crankshaft Position (CKP) sensor sends pulses to ECM as the 58 reluctor wheel teeth rotate past sensor. ECM knows acceleration and deceleration crankshaft should experience under different conditions and can constantly determine its speed of rotation. A misfire causes an unexpected change in crankshaft speed. ECM continuously calculates crankshaft position from CKP sensor signals. This information is used to determine which cylinder is misfiring so that ECM can increment the appropriate misfire counter and set the appropriate DTC. If ECM is unable to determine that a specific cylinder is misfiring or if misfire is random and on multiple cylinders, DTC P0300 will set.