P2687 moderate

Glow Plug 5 Circuit Open

The P2687 code means the vehicle's onboard diagnostic system has detected: Glow Plug 5 Circuit Open. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
moderate
Estimated cost
$100 - $400 (parts and labor)
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Common Symptoms

  • Check Engine Light on
  • Cold-start issues becoming more noticeable
  • Rough running for first 30-60 seconds
  • Multiple glow plug codes may be present
  • Reduced cold-weather performance

Probable Causes (Ranked by Likelihood)

  • Burned out glow plug in cylinder 5 Very High
  • Wiring fault to glow plug 5 High
  • Glow plug carbon fouling Moderate
  • Control module channel degradation Low

Step-by-Step Diagnostic Procedure

  1. Read freeze frame data and confirm P2687 is present

  2. Test resistance of all glow plugs and compare

  3. Check wiring from module to glow plug 5

  4. Consider replacing all glow plugs if multiple have failed

Frequently Asked Questions

What does P2687 mean?

P2687 indicates a problem with the glow plug 5 circuit open. Glow plugs are essential for cold-starting diesel engines by preheating the combustion chambers.

Can I drive with a P2687 code?

You can drive short distances once the engine is running. The main issue is cold starting difficulty. In warm weather, the effect is minimal, but cold weather starting will be significantly impacted.

How much does it cost to fix P2687?

Repairs typically cost $100 - $400. Individual glow plugs are $20 to $50 each, but labor can be significant if they are seized in the cylinder head.

Sources

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

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