SAVE MONEY and buy Motor Oils and Car Parts online - FREE SHIPPING!!! RECOMMENDED BY THE PEOPLES GARAGE\r \r \r \r Cylinder misfire Diagnosis, Diagnostic - P0301 - P0310 Misfire Codes Explained : P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0309, P0310 - All indicate Misfires on Particular Cylinders.