Check Engine Codes / P0300
P0300 Code
Random/Multiple Cylinder Misfire Detected
What it means
The engine is misfiring across multiple cylinders — fuel, spark, or air is off somewhere common to all of them.
Can you keep driving?
Limit driving, especially if the check-engine light is flashing — a flashing light means raw fuel is reaching the cat and can destroy it.
Common causes
Listed most-common first. Fix cost depends on which one it turns out to be — check your quote free below.
⚠️ Don't get ripped off
Start cheap: plugs and coils cause most P0300s. A shop quoting injectors or internal engine work without showing you plug condition or a misfire counter readout is skipping steps.
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Related codes
Informational only — codes share symptoms across vehicles, so proper diagnosis on your specific car always comes first.