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.
- 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
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.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Check the EGR cooler valve fuse
-
Inspect wiring and connector at the EGR cooling valve
-
Measure the valve solenoid resistance
-
Command the valve with a scan tool to verify operation
-
Check for coolant leaks at the EGR cooler assembly
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- 2008-2016 Ford F-250 6.4L Diesel
- 2011-2019 Ford F-250 6.7L Diesel
- 2010-2018 Ram 2500 6.7L Diesel
- 2012-2020 Chevrolet Silverado 6.6L Duramax
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