What does OBD2 code P0300 mean?+
P0300 stands for Random/Multiple Cylinder Misfire Detected. The ECM has detected misfires occurring in multiple cylinders or cannot identify which cylinder is misfiring. This is often caused by a systemic problem affecting all cylinders.
What causes code P0300?+
Worn or fouled spark plugs on multiple cylinders; Faulty ignition coil(s); Low fuel pressure or clogged injectors; Vacuum leak causing lean condition; Low engine compression
How do I fix code P0300?+
Inspect and replace all spark plugs; Test each ignition coil with swap method; Check fuel pressure at rail; Smoke test for vacuum leaks; Perform compression test on all cylinders
How much does it cost to fix P0300?+
Estimated repair cost for P0300 is $50–$400.
Is P0300 DIY-friendly?+
Yes — P0300 is generally DIY-friendly with basic tools.