P2427 moderate

Exhaust Gas Recirculation Cooling Valve Control Circuit High

The P2427 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Recirculation Cooling Valve Control Circuit High. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$200 - $800 (parts and labor)
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Common Symptoms

  • Check Engine Light illuminated
  • EGR cooler bypass not functioning
  • Engine running hotter than normal under load
  • Increased NOx emissions
  • Failed emissions inspection

Probable Causes (Ranked by Likelihood)

  • Open circuit in EGR cooler valve wiring Very High
  • Disconnected EGR cooler valve connector High
  • Failed solenoid with open coil winding Moderate
  • Broken wire in engine harness Moderate

Step-by-Step Diagnostic Procedure

  1. Check if the EGR cooler valve connector is plugged in

  2. Measure solenoid coil resistance (should not be infinite)

  3. Inspect wiring for open circuits

  4. Verify voltage at the valve connector with key on

  5. Check for engine harness damage from heat or vibration

Frequently Asked Questions

Can I drive with code P2427?

Short distances at moderate load. Avoid heavy towing until the EGR cooler valve is repaired to prevent elevated engine temperatures.

What causes P2427?

Usually a disconnected connector or open wiring. Check the connector first. Diesel engine vibration can loosen connections over time.

Is P2427 expensive to fix?

Typically $200 to $800. A disconnected connector is free to fix. Solenoid and wiring repairs are moderate. Full EGR cooler work is more expensive.

Sources

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

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