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DTC DATABASE • OBD-II
P0300

Random/Multiple Cylinder Misfire Detected

This page explains common reasons this code appears and what should be checked before parts are replaced.

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Common causes

What can trigger P0300?

  • Ignition coils / plugs
  • Injector or fuelling issue
  • Compression / timing problem
  • Air leak
Typical symptoms

What you may notice

  • Rough idle
  • Hesitation
  • Flashing or steady engine warning light

Do not diagnose from the code alone

The code alone does not identify the failed part. Live data, wiring checks and manufacturer-specific subcodes may be required before replacing components.

Full scanLive dataWiring checksSensor plausibilityECU / module communication
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