P2311 moderate

Ignition Coil F Primary Control Circuit High

What does P2311 mean?

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.

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

  1. Check spark plug well for fluid contamination

  2. Swap coil F with another coil to verify the fault

  3. Inspect wiring for heat or abrasion damage

  4. Measure coil resistance values

  5. 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.

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