Check Engine Codes / P0301
P0301 Code
Cylinder 1 Misfire Detected
What it means
One specific cylinder (number 1) is misfiring. The fix is usually whatever ignition or fuel part serves that cylinder.
Can you keep driving?
Minimize driving; a flashing check-engine light means stop — it's killing the catalytic converter.
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
The classic diagnostic move is free: swap the coil from cylinder 1 to another cylinder. If the misfire follows, it's the coil. Ask if the shop did this before approving a bigger quote.
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Related codes
Informational only — codes share symptoms across vehicles, so proper diagnosis on your specific car always comes first.