Toyota Corolla · Diagnostic Trouble Code
P0301 — Cylinder 1 Misfire Detected
Quick overview of P0301 on your Toyota Corolla. Read the full diagnosis guide, then find the repair guides for your vehicle below.
Repair guides that fix P0301
Toyota Corolla
2009-2013 Toyota Corolla - Spark Plug Replacement
The most common misfire fix: a fresh set of plugs.
Toyota Corolla
2014-2019 Toyota Corolla - Ignition Coils
How to test and replace a bad coil pack.
Toyota Corolla
2014-2019 Toyota Corolla - Check Engine Light
What that light means and what to check first.
General diagnostic information, not a factory service procedure. If you're unsure, have a qualified technician confirm the diagnosis before buying parts.