DTC P0300: Multiple Cylinder Misfire: Description

Cylinder misfire is monitored with engine running, after successfully performing Crankshaft Position (CKP) sensor learn procedure. DTC will set in Powertrain Control Module (PCM) memory when PCM senses more than 2 percent misfire rate is measured during 2 trips or with a 10-30 percent misfire rate during one trip. Possible causes for DTC to set are: defective Camshaft Position (CMP) or CKP sensor, improper valve timing, vacuum leak, defective ignition system, engine mechanical problem, fuel contamination, improper fuel pressure or capacity, or defective fuel pump.