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P0305

High Severity

Cylinder 5 Misfire Detected

Ignition System

What Does P0305 Mean?

Cylinder 5 is misfiring. Only on 5+ cylinder engines.

Common Fix

Replace spark plug or coil

Estimated Cost (DIY)

$5 - $80

Symptoms

  • ⚠️Rough idle
  • ⚠️Power loss
  • ⚠️Vibration

Common Causes

Bad spark pluglikely
Faulty coillikely
Bad injectorpossible

How to Diagnose P0305

  1. 1Swap plug/coil
  2. 2Check injector
  3. 3Compression test

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Related Codes

Frequently Asked Questions

Do V6 engines often misfire on cylinder 5?
No specific cylinder is more prone. However, rear cylinders can be harder to service, leading to deferred maintenance.
What if multiple specific cylinders misfire?
If cylinders on the same bank misfire, check for a bank-specific issue like a failed coil pack, intake leak, or head gasket.

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