P0310 - Cylinder 10 Misfire Detected

Cylinder 10 is misfiring often enough for the ECM to detect it.

Code Overview

Cylinder 10 is misfiring often enough for the ECM to detect it.

Common Causes

• Worn or fouled spark plug on cylinder 10
• Weak ignition coil, boot, or plug wire for cylinder 10
• Fuel injector issue on cylinder 10
• Vacuum leak affecting the cylinder 10 runner
• Low compression or valve sealing problem on cylinder 10

Symptoms

• Rough idle or uneven engine note
• Weak pull or stumble during acceleration
• Fuel smell or flashing MIL if the misfire gets severe

Diagnostic Steps

1. Swap the coil or plug with another cylinder and see whether the misfire follows
2. Inspect the cylinder 10 spark plug, boot, and plug well for wear or oil intrusion
3. Check injector operation and connector condition on cylinder 10
4. Perform compression or leak-down testing if the misfire stays on the same hole

Repair Difficulty

Moderate

General difficulty estimate for the most common repair path.

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

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Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.