P0310
UniversalCylinder 10 Misfire Detected
The engine computer detected uneven combustion associated with cylinder 10, commonly by monitoring changes in crankshaft speed. A misfire can reduce power and fuel economy, cause rough running, and allow unburned fuel into the exhaust. The code does not identify the cause, and cylinder numbering and applicability depend on the vehicle's engine.
⚠️ Before You Begin (Safety First)
If the check-engine light is flashing, the engine is shaking badly, power drops significantly, or you smell fuel, stop driving when safe and arrange prompt inspection. A continuing misfire can overheat and damage the catalytic converter. If the vehicle runs normally and the light is steady, avoid heavy loads and have it diagnosed soon.
Common Symptoms
- Rough idle or vibration may occur if cylinder 10 is misfiring at idle.
- Hesitation, reduced acceleration, or loss of power may occur because the cylinder contributes less power.
- Fuel economy may worsen as combustion becomes less effective.
- The check-engine light may turn on; it may flash when a misfire is severe enough to risk exhaust-system damage.
- There may be no obvious symptoms if the misfire is intermittent or mild.
Common Causes
- A worn or damaged spark plug, ignition coil, or related ignition connection may prevent reliable combustion, if the engine uses those components.
- A fuel injector or its electrical connection may not deliver fuel correctly to the cylinder.
- Damaged wiring or a poor connection in a relevant ignition or fuel-control circuit may interrupt operation.
- An air leak or other condition affecting the cylinder's air-fuel mixture may contribute to misfire.
- Low compression or an internal mechanical problem may prevent the cylinder from combusting normally.
- Intermittent operating conditions or a fault elsewhere may affect misfire detection; further testing is needed to determine the cause.
Diagnostic Steps
- Check whether the check-engine light is flashing and note rough running, power loss, or fuel odor; stop driving if symptoms are severe.
- Record all diagnostic codes and available freeze-frame information before clearing anything, since related codes and operating conditions can help guide diagnosis.
- Use vehicle-specific service information to confirm whether the engine has a cylinder 10 and identify its location; do not assume cylinder numbering.
- With the engine off and cool, visually check accessible ignition and engine wiring connectors for looseness or obvious damage. Avoid touching hot or moving parts.
- If the vehicle's service information describes an accessible inspection, check the relevant spark plug and ignition component for obvious damage or contamination; do not replace parts solely because this code is present.
- If basic checks do not reveal a cause, arrange testing of fuel delivery, wiring, and engine compression by a qualified technician.
When to Call a Professional
Confirm that the vehicle has a cylinder 10 and check model-, year-, and engine-specific service information for cylinder numbering. Review stored and pending codes and available misfire data, then inspect the cylinder's ignition, fuel delivery, wiring, and mechanical condition as appropriate. Use diagnostic results to identify the cause before replacing parts.
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Commonly Asked Questions
Does P0310 prove that the ignition coil is faulty?
No. It reports a misfire detected on cylinder 10, not a confirmed failed part. Ignition, fuel delivery, wiring, air-fuel mixture, and mechanical condition may all need consideration.
Does every vehicle have a cylinder 10?
No. Applicability depends on the engine and vehicle. Confirm the engine configuration and cylinder numbering using model-specific service information.
Can I keep driving with P0310?
A mild or intermittent fault with a steady warning light may allow cautious travel to a repair facility, but prompt diagnosis is advisable. Stop when safe if the light flashes, the engine runs very roughly, power drops substantially, or fuel odor is present.
Why should related codes and freeze-frame data be checked?
They can show whether other faults are present and what conditions existed when the misfire was detected. This helps distinguish possible causes before parts are replaced.
Browse Available Code Guides
Previous and next available guides in database record order, across makes. Adjacent entries may share a code number and do not necessarily describe related faults.