P0310 - Cylinder 10 Misfire Detected

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

Treat the code as the starting point: compare symptoms, likely causes, and repair paths before pricing parts or moving into an estimate.

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 symptoms, scan data, and quick checks to confirm the likely repair path before pricing parts. The estimator helps compare repair paths before replacing anything unnecessarily.

Related OBD Codes

Browse nearby code-family pages when the same fault pattern overlaps across systems, such as misfire, lean fuel trim, EVAP sealing, cooling, or charging faults.

Next Steps

Move from code lookup to diagnosis, then estimate the likely repair only after symptoms, causes, and checks point to the same path.