Cylinder 10 Misfire Detected
The P0310 code means the vehicle's onboard diagnostic system has detected: Cylinder 10 Misfire Detected. This is a critical severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $100 - $800 (parts and labor)
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Read and clear misfire codes. Shows which cylinder is misfiring so you know exactly what to replace.
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Common Symptoms
- Engine misfire on cylinder 10
- Rough idle and vibration
- Check Engine Light flashing
- Reduced power output
- Strong exhaust odor or unburned fuel smell
Probable Causes (Ranked by Likelihood)
- Faulty spark plug or ignition coil on cylinder 10 Very High
- Fuel injector failure on cylinder 10 High
- Low compression in cylinder 10 Moderate
- Vacuum leak near cylinder 10 intake Moderate
- Worn camshaft lobe or timing chain issue Low
Frequently Asked Questions
Can I drive with code P0310?
You can drive short distances if the Check Engine Light is steady. If it is flashing, stop driving immediately as catalytic converter damage can occur rapidly.
What vehicles have a cylinder 10?
Only V10 engines have a cylinder 10. Common examples include the Ford Triton 6.8L V10, Dodge Viper V10, and Lamborghini V10 engines.
Should I replace all spark plugs if only cylinder 10 misfires?
While you only need to replace the failed plug, it is good practice to replace all spark plugs as a set if they are near their service interval, especially on V10 engines where labor is significant.
What actually makes the computer set a misfire code?
The OBD II regulation defines two separate misfire thresholds (Title 13 CCR 1968.2, section (e)(3.2)). One is misfire severe enough to damage the catalyst, evaluated in 200-revolution increments — and where the damaging rate would be under five percent, the manufacturer may simply set the limit at five percent. The other is misfire causing emissions to exceed 1.5 times the FTP standards. That is why a flashing light (catalyst-damage rate) means stop driving while a steady light for the same code does not. This is the threshold the monitor is designed around, not a description of your specific fault — the regulation says what the system must detect, not how to find it on your vehicle.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Inspect and replace spark plug on cylinder 10 -- check gap and electrode condition
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Swap ignition coil from cylinder 10 with a known-good cylinder and retest
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Check fuel injector resistance and operation using a noid light and multimeter
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Perform a compression test on cylinder 10 -- should be within 10% of the highest cylinder
-
Use a smoke machine to check for vacuum leaks near cylinder 10 intake runner
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- California Code of Regulations, Title 13 section 1968.2 (OBD II)malfunction criteria, section (e)
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- 2005-2015 Ford F-250 V10
- 2004-2014 Ford E-Series V10
- 2008-2018 Dodge Viper V10
- 2006-2016 Ford Excursion V10
- 2007-2017 Lamborghini Gallardo V10
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