p0301
Moderate
Toyota · Sedans
Cylinder 1 Misfire Detected
Quick Answer
Error code P0301 on your Toyota Sedans means: Cylinder 1 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
Remove and inspect the spark plug on cylinder 1 for fouling or wear
2
Swap the ignition coil from cylinder 1 with another cylinder and recheck codes
3
Test the fuel injector on cylinder 1 for proper operation
4
Perform a compression test on cylinder 1 and compare to adjacent cylinders
5
Inspect the wiring harness and connector to the coil and injector on cylinder 1
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 plug
Ignition coil
Fuel injector
Spark plug wire or boot
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