Ignition Coil F Primary Control Circuit High
The P2311 code means the vehicle's onboard diagnostic system has detected: Ignition Coil F Primary Control Circuit High. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $50 - $400 (parts and labor)
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Common Symptoms
- Cylinder 6 misfire detected
- Check Engine Light illuminated
- Engine running unevenly
- Power loss during acceleration
- Increased exhaust emissions
Probable Causes (Ranked by Likelihood)
- Short circuit in coil F wiring Very High
- Internally shorted ignition coil F High
- Oil or water in cylinder 6 spark plug well Moderate
- ECM coil driver circuit fault Low
Step-by-Step Diagnostic Procedure
-
Check spark plug well for fluid contamination
-
Swap coil F with another coil to verify the fault
-
Inspect wiring for heat or abrasion damage
-
Measure coil resistance values
-
Check valve cover gasket if oil is found in the plug well
Frequently Asked Questions
Can I drive with code P2311?
Short distances only. Repair the misfire promptly to avoid catalytic converter damage.
What causes P2311?
Usually a shorted ignition coil or fluid in the spark plug well. Oil leaks from the valve cover gasket are a common root cause on V6 engines.
Is P2311 expensive to fix?
Typically $50 to $400. Coil replacement is inexpensive. Valve cover gasket replacement adds cost if needed.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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