P0300 — Random/Multiple Cylinder Misfire Detected

Q: What does fault code P0300 mean?

P0300 means: Random/Multiple Cylinder Misfire Detected. It is a Powertrain (engine/transmission) fault code defined by the OBD-II standard.

Q: Can I keep driving with P0300?

If the engine light is flashing or the car is running poorly, drive as little as possible with P0300. Book an inspection promptly.

Powertrain (engine/transmission)

P0300 indicates a random or multiple cylinder misfire has been detected by the engine control module (ECM). This means that the engine is experiencing combustion issues in various cylinders, not limited to a single cylinder.

The powertrain control module (PCM)/ECM monitors engine speed fluctuations to detect misfires across multiple engine cylinders, ensuring efficient combustion and preventing catalytic converter damage.

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Can I drive with P0300?

Drive as little as possible and book an inspection promptly.

Likely root causes

Vacuum leaks (e.g., intake manifold gasket, vacuum hoses)
Failing fuel injectors or fuel pump (leading to lean condition starvation)
Faulty mass airflow (MAF) sensor or oxygen (O2) sensor (providing incorrect air/fuel mixture data)

Common symptoms with P0300

Engine runs rough

Full symptom matching, likelihood scoring and related codes for your specific vehicle require a diagnosis.

Frequently asked questions

What does fault code P0300 mean?

P0300 means Random/Multiple Cylinder Misfire Detected.

Can I keep driving with P0300?

Drive as little as possible and book an inspection promptly.

What symptoms are common with P0300?

Engine runs rough

Related fault codes

Get a full diagnosis for P0300 with AutoUncover.