p0300
Moderate
Toyota · Sedans
Random/Multiple Cylinder Misfire Detected
Quick Answer
Error code P0300 on your Toyota Sedans means: Random/Multiple Cylinder Misfire Detected. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Avalon XLE 2022Camry XSE 2024Camry Hybrid SE 2024Corolla SE 2024Corolla Hybrid LE 2024Crown Platinum 2024Mirai Limited 2024Prius XLE 2024Camry LE 2023Camry LE 2024Camry SE 2023Camry SE 2024Camry TRD 2024Camry XLE 2024Corolla LE 2023Corolla LE 2024Corolla XSE 2024Crown Limited 2024Crown XLE 2024Prius LE 2024Prius Limited 2024
Likely Causes
How to Fix It
1
Pull and inspect all spark plugs for wear, fouling, or incorrect gap
2
Test ignition coils individually by swapping between cylinders
3
Check fuel pressure and inspect injectors for blockage
4
Perform a vacuum leak test using smoke machine or carb cleaner
5
Run a compression test on all cylinders to rule out internal engine issues
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Spark plugs
Ignition coils
Fuel injectors
Intake manifold gasket
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