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P0303 — Cylinder 3 Misfire Detected

Cylinder 3 is misfiring.

Severity: HighRepair: $20-$800Difficulty: Easy

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Common symptoms of P0303

Common causes of P0303

Repair cost & difficulty

Typical cost to fix P0303: $20-$800 · Difficulty: Easy

Pro tip: Same coil/plug swap diagnosis. Cylinder 3 on V6 engines may be harder to access on rear bank.

Vehicles commonly affected

All makes

Related trouble codes

P0300P0203

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ScanFixAI is a diagnostic aid, not a substitute for professional repair. Cost estimates are typical ranges and vary by vehicle and region.