EZCarFix DIY Auto Repair

Mazda CX-5 · Diagnostic Trouble Code

P0303 — Cylinder 3 Misfire Detected

Quick overview of P0303 on your Mazda CX-5. Read the full diagnosis guide, then find the repair guides for your vehicle below.

Read the full P0303 diagnosis guide →

Repair guides that fix P0303

Mazda CX-5

2017-2026 Mazda CX-5 — Spark Plug Replacement

The most common misfire fix: a fresh set of plugs.

Mazda CX-5

2017-2026 Mazda CX-5 - Ignition Coils

How to test and replace a bad coil pack.

Mazda CX-5

2017-2026 Mazda CX-5 - 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.