What is the meaning of OBD-II code P0305, and what are the possible causes and solutions for this code to be generated?

The P0305 code is a fault indication from the engine control module that there is a misfire occurring in the fifth cylinder of the engine. There are several possible causes for a P0305 code, such as: -Fouling or cracks in insulation -Stopped firing ignition coil -Leaking spark plug wire or boot -Oil leakage from valve cover into spark plug holes To diagnose the problem, a mechanic will typically scan codes, clear codes, road test, remove the ignition coil/plug wire, check the spark plug, and check cylinder compression. The resolution to the P0305 code will vary depending on the cause but could involve replacing a faulty spark plug or all spark plugs if they are worn out. In case of a leaking valve cover gasket, replacing it along with the failed coil, plug wires, and plugs may be necessary. The P0305 code is activated when the crankshaft sensor does not detect acceleration from the power stroke in cylinder 5, indicating a lack of contribution to engine power.