P0300

Random / Multiple Cylinder Misfire Detected

P0300
Random / Multiple Cylinder Misfire Detected
Drive with caution
Ranked Possible Causes
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What You'll Notice

Rough idle, CEL flashing under load, Hesitation on acceleration, Engine shakes at stoplights

Cost Estimate
JobRange
Spark plugs + inspect coils (DIY)$40–$120
Coil pack replacement (per coil)$60–$200
Intake gasket / vacuum leak repair (shop)$150–$450
Full misfire diagnostic (shop)$90–$180
Parts You Might Need
• Spark plug set
• Ignition coil pack
• Intake manifold gasket

These percentages are general patterns, not a diagnosis for your specific vehicle. Have a technician scan your car to confirm which component is actually failing.

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