P0306High urgency
Cylinder 6 Misfire Detected
Powertrain · Ignition System
⛔ Stop driving if the check engine light flashes. Steady light: drive cautiously directly to a shop.
What this means
The ECU has detected a misfire occurring specifically in Cylinder 6. Common on V6 and V8 engines where Cylinder 6 is on the rear bank.
Likely causes
- Worn Cylinder 6 spark plugMost common
- Failed Cylinder 6 ignition coilMost common
- Clogged Cylinder 6 injectorCommon
Estimated repair cost
Spark plug$20 – $80
Ignition coil$60 – $200
Fuel injector$150 – $400
🏪
Sponsored · Local Shop
Find shops near you specializing in this repair
Get quotes from certified mechanics · Free estimates
📦
Sponsored · Parts (Amazon affiliate)
Shop parts commonly used for this repair
Amazon search results for this code · prices and availability vary
Sponsored: MyOBDCode may earn compensation when you click partner links on this page.
Frequently asked questions about P0306
What does P0306 mean?
The ECU has detected a misfire occurring specifically in Cylinder 6. Common on V6 and V8 engines where Cylinder 6 is on the rear bank.
Is P0306 serious?
Stop driving if the check engine light flashes. Steady light: drive cautiously directly to a shop.
How much does it cost to fix P0306?
Repair costs for P0306 range from $20 – $80 depending on the root cause and your vehicle.
Can I drive with P0306?
No — this code indicates a serious issue. Stop driving and have the vehicle inspected immediately.