P2314 moderate

Ignition Coil H Primary Control Circuit Low

The P2314 code means the vehicle's onboard diagnostic system has detected: Ignition Coil H Primary Control Circuit Low. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
moderate
Estimated cost
$50 - $350 (parts and labor)
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Common Symptoms

  • Misfire on cylinder 8
  • Check Engine Light flashing or steady
  • Rough running engine especially at idle
  • Reduced engine power
  • Unburned fuel odor from exhaust

Probable Causes (Ranked by Likelihood)

  • Failed ignition coil H Very High
  • Damaged wiring to coil H High
  • Corroded coil H electrical connector Moderate
  • Worn or gap-too-wide spark plug on cylinder 8 Moderate

Step-by-Step Diagnostic Procedure

  1. Swap coil H with another coil to confirm the fault

  2. Replace spark plug on cylinder 8

  3. Check coil H connector for corrosion

  4. Measure coil H primary winding resistance

  5. Inspect wiring routing for heat damage near exhaust

Frequently Asked Questions

Can I drive with code P2314?

Short distances only. Cylinder 8 misfire should be repaired quickly to prevent catalytic converter overheating.

What causes P2314?

A failed ignition coil on cylinder 8. Hemi V8 engines are particularly known for coil failures due to heat exposure.

Is P2314 expensive to fix?

Typically $50 to $350. Coil replacement is straightforward. Hemi engines benefit from replacing all 16 spark plugs (dual plug) during coil service.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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