P2317 serious

Ignition Coil B Primary Control Circuit Low

The P2317 code means the vehicle's onboard diagnostic system has detected: Ignition Coil B Primary Control Circuit Low. This is a serious severity code.

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Keep driving?
Short distances only
DIY difficulty
moderate
Estimated cost
$150 - $350 (parts and labor)
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Common Symptoms

  • Check Engine Light illuminated
  • Engine misfire on cylinder 2
  • Rough idle and vibration
  • Reduced engine power and hesitation
  • Increased fuel consumption

Probable Causes (Ranked by Likelihood)

  • Faulty ignition coil B (cylinder 2) Very High
  • Short circuit in coil B wiring harness High
  • Corroded or damaged connector pins Moderate
  • PCM/ECM driver circuit failure Low

Step-by-Step Diagnostic Procedure

  1. Scan for codes and confirm P2317 with freeze frame data

  2. Measure resistance of ignition coil B primary winding (typically 0.4-2 ohms)

  3. Inspect wiring harness and connector to coil B for shorts to ground

  4. Swap coil B with a known good coil and recheck for misfire migration

Frequently Asked Questions

What does P2317 mean?

P2317 means the PCM has detected a low voltage condition in the primary control circuit of ignition coil B (cylinder 2). This usually indicates a short to ground or a failed coil.

Can I drive with P2317?

You can drive short distances, but the engine will misfire on cylinder 2, causing rough running, potential catalytic converter damage, and increased emissions. Get it repaired promptly.

How much does it cost to fix P2317?

Most repairs cost $150 to $350. Replacing an ignition coil is typically $75-$200 for the part plus $75-$150 in labor. Wiring repairs may cost more.

Sources

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

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