⚡ AUTO CODE FIX
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EngineCritical✅ DIY Friendly

P0307

Cylinder 7 Misfire Detected

Misfire in cylinder 7. Found on V8 and V10 engines.

SeverityCritical
CategoryEngine
Est. Repair Cost$60–$450
Code TypePowertrain
DIY RepairYes

⚡ Common Causes

⚠️ Symptoms

✅ How to Fix — Step by Step

  • Step 1:Replace spark plug
  • Step 2:Replace coil
  • Step 3:Test injector
  • Step 4:Full compression test
💡 Pro Tip: On high-mileage V8 engines replace all plugs at once to prevent repeat misfires.

Repair Cost Estimate

Full Repair Estimate
$60–$450
DIY Possible?
YES
Severity
Critical

Frequently Asked Questions

What does OBD2 code P0307 mean?+
P0307 stands for Cylinder 7 Misfire Detected. Misfire in cylinder 7. Found on V8 and V10 engines.
What causes code P0307?+
Worn spark plug; Ignition coil failure; Injector failure; Mechanical engine issue
How do I fix code P0307?+
Replace spark plug; Replace coil; Test injector; Full compression test
How much does it cost to fix P0307?+
Estimated repair cost for P0307 is $60–$450.
Is P0307 DIY-friendly?+
Yes — P0307 is generally DIY-friendly with basic tools.

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