P0300: Random/Multiple Cylinder Misfire Detected
System: Engine misfire · Priority: high
What P0300 means
The control module detected a condition matching the generic definition Random/Multiple Cylinder Misfire Detected. A trouble code identifies what the module detected; it does not automatically identify the failed part.
Useful next checks
- Check freeze-frame data and misfire counters if available.
- Inspect ignition, fuel delivery, vacuum leaks and mechanical condition.
- Do not replace coils or plugs only from the code without identifying the failing cylinder or condition.
Why vehicle context matters
The same generic code can have different diagnostic paths depending on engine, calibration, wiring layout, service bulletins and related codes. Freeze-frame and live data can help establish when the fault occurred.
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