Toyota 4Runner · Diagnostic Trouble Code
P0300 — Random/Multiple Cylinder Misfire Detected
Quick overview of P0300 on your Toyota 4Runner. Read the full diagnosis guide, then find the repair guides for your vehicle below.
Repair guides that fix P0300
Toyota 4Runner
2010-2024 Toyota 4Runner - Spark Plug Replacement
The most common misfire fix: a fresh set of plugs.
Toyota 4Runner
2010-2024 Toyota 4Runner - Ignition Coils
How to test and replace a bad coil pack.
Toyota 4Runner
2010-2024 Toyota 4Runner — Check Engine Light / OBD2 Diagnosis
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.