P0305
High SeverityCylinder 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
- β οΈRough idle
- β οΈPower loss
- β οΈVibration
Common Causes
Bad spark pluglikely
Faulty coillikely
Bad injectorpossible
How to Diagnose P0305
- 1Swap plug/coil
- 2Check injector
- 3Compression test
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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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