P2425 moderate

Exhaust Gas Recirculation Cooling Valve Control Circuit Open

The P2425 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Recirculation Cooling Valve Control Circuit Open. 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
  • Increased NOx emissions
  • Engine knocking under load
  • Reduced fuel economy
  • EGR cooler not regulating temperature

Probable Causes (Ranked by Likelihood)

  • Failed EGR cooler bypass valve Very High
  • Damaged wiring to EGR cooling valve High
  • Corroded connector at EGR cooling valve Moderate
  • Blown fuse for EGR cooler circuit Low

Step-by-Step Diagnostic Procedure

  1. Check the EGR cooler valve fuse

  2. Inspect wiring and connector at the EGR cooling valve

  3. Measure the valve solenoid resistance

  4. Command the valve with a scan tool to verify operation

  5. Check for coolant leaks at the EGR cooler assembly

Frequently Asked Questions

Can I drive with code P2425?

Short distances only. Without proper EGR cooling, combustion temperatures can be higher than designed, which increases wear on engine components.

What causes P2425?

Usually a failed EGR cooler bypass valve or damaged wiring. This code is most common on diesel trucks with EGR cooler systems.

Is P2425 expensive to fix?

Typically $200 to $800. The bypass valve itself is moderately priced but EGR cooler replacement on diesel engines is more labor intensive.

Sources

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

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