What Does P0310 Mean?
The ECM has detected a misfire condition specifically in cylinder 10. This code applies to V10, V12, and W12 engines found in performance and luxury vehicles. The crankshaft position sensor detects a deceleration during the cylinder 10 power stroke, indicating it is not producing expected torque. The driver may notice rough running, vibration, reduced power, and the check engine light.
Safety Warning
A misfiring cylinder sends unburned fuel to the catalytic converter, causing overheating and potential failure. If the check engine light is flashing, minimize driving and avoid high load. On high-performance engines, continued misfires can also damage expensive exhaust components.
Common Causes
30%
Worn or fouled spark plug on cylinder 10 unable to produce adequate spark
25%
Failing ignition coil on cylinder 10 producing weak or intermittent spark
20%
Fuel injector on cylinder 10 restricted or malfunctioning
15%
Compression loss on cylinder 10 from worn rings, leaking valve, or head gasket failure
10%
Wiring harness damage to cylinder 10 coil or injector — common in tightly packaged engine bays
Diagnostic Steps
1
Swap the ignition coil from cylinder 10 with an adjacent cylinder — if the misfire follows the coil, replace it; if it stays on cylinder 10, the coil is not the cause.
2
Remove and inspect the cylinder 10 spark plug — check gap, electrode condition, and fouling pattern; access may require intake manifold or accessory removal on some V10/V12 configurations.
3
Check cylinder 10 fuel injector with a stethoscope or Noid light — verify it clicks rhythmically at idle; measure resistance (typically 11-18 ohms) and compare to other cylinders.
4
Perform a compression test on cylinder 10 — minimum is typically 100 PSI and should be within 10% of the highest cylinder; low compression requires a leak-down test.
5
Inspect the wiring harness routing to cylinder 10 for chafing, heat damage, or corroded connectors — these are common failure points in tightly packaged engine bays.
Estimated Repair Cost
$100 - $1,200
Parts + labor, varies by vehicle and location
The ECM has detected a misfire condition specifically in cylinder 10. This code applies to V10, V12, and W12 engines found in performance and luxury vehicles. The crankshaft position sensor detects a deceleration during the cylinder 10 power stroke, indicating it is not producing expected torque. Th...
The most common cause of P0310 (Cylinder 10 Misfire Detected) is: Worn or fouled spark plug on cylinder 10 unable to produce adequate spark
Typical repair costs for P0310 range from $100 to $1,200, depending on the vehicle, location, and whether you do it yourself or go to a shop.
A misfiring cylinder sends unburned fuel to the catalytic converter, causing overheating and potential failure. If the check engine light is flashing, minimize driving and avoid high load. On high-performance engines, continued misfires can also damage expensive exhaust components.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0310 to identify the root cause.
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Quick Info
Category
Powertrain
System
Ignition System
Difficulty
Type
Generic (SAE)
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