Cylinder 10 Misfire Detected
The Powertrain Control Module (PCM) has detected a misfire originating specifically from cylinder number 10. This is determined by monitoring variations in the crankshaft rotational speed that indicate a lack of combustion in that specific cylinder.
A misfire can cause severe damage to the catalytic converter if unburned fuel enters the exhaust. It should be diagnosed and repaired as soon as possible, especially if the check engine light is flashing.
Common symptoms
- Illuminated or flashing Check Engine Light
- Rough idle or engine hesitation during acceleration
- Noticeable lack of engine power
- Decreased fuel efficiency
- Smell of unburned fuel from the exhaust
Likely causes
- Faulty or worn spark plug in cylinder 10
- Defective ignition coil or spark plug wire for cylinder 10
- Clogged or failing fuel injector at cylinder 10
- Vacuum leak or intake manifold gasket leak near cylinder 10
- Low engine compression in cylinder 10 due to internal wear or valve issues
What to check before replacing parts
Read freeze frame data and clear codes, then test drive.
Look for: Verify if the P0310 code returns immediately and check if the misfire occurs under specific engine load or temperature conditions.
Inspect the spark plug and ignition coil for cylinder 10.
Look for: Look for worn electrodes, carbon tracking, cracked porcelain, or oil/coolant contamination in the spark plug well.
Swap the cylinder 10 ignition coil with a known good coil from another cylinder.
Look for: If the misfire code moves to the new cylinder, the ignition coil is faulty. If it stays P0310, the coil is likely good.
Test the fuel injector for cylinder 10 using a noid light or by swapping it.
Look for: A noid light should pulse steadily, indicating the PCM is commanding the injector. If swapping the injector moves the misfire, the injector is clogged or failed.
Perform a cylinder compression and leak-down test on cylinder 10.
Look for: Compression readings significantly lower than other cylinders indicate mechanical issues like worn piston rings, a burnt valve, or a blown head gasket.
This page explains the generic P0310 definition and is general reference information, not a diagnosis for your specific vehicle. Actual causes, severity, and repairs vary by make, model, engine, and mileage — always confirm with a scan tool and a qualified technician before replacing parts.
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