P0307High urgency
Cylinder 7 Misfire Detected
Powertrain · Ignition System
⛔ Stop driving if the check engine light flashes. Serious misfire risk to catalytic converters. Service immediately.
What this means
Cylinder 7 misfire detected — specific to V8, V10, and V12 engines.
Likely causes
- Worn Cylinder 7 spark plugMost common
- Failed Cylinder 7 ignition coilMost common
- Cylinder 7 injector faultCommon
Estimated repair cost
Spark plug$20 – $80
Ignition coil$60 – $200
Fuel injector$150 – $400
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Frequently asked questions about P0307
What does P0307 mean?
Cylinder 7 misfire detected — specific to V8, V10, and V12 engines.
Is P0307 serious?
Stop driving if the check engine light flashes. Serious misfire risk to catalytic converters. Service immediately.
How much does it cost to fix P0307?
Repair costs for P0307 range from $20 – $80 depending on the root cause and your vehicle.
Can I drive with P0307?
No — this code indicates a serious issue. Stop driving and have the vehicle inspected immediately.