Code Definition

P0300 — Random/Multiple Cylinder Misfire Detected

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0300

P0300 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0300 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0300 fault code is set when the powertrain control module (PCM) detects random or multiple cylinder misfires that cannot be attributed to a specific cylinder. Misfires occur when the air-fuel mixture in the combustion chamber fails to ignite properly, which can result from a wide range of mechanical, electrical, or fuel-related issues.

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