Exhaust Gas Recirculation Cooling Valve Control Circuit Low
The P2426 code means the vehicle's onboard diagnostic system has detected: Exhaust Gas Recirculation Cooling Valve Control Circuit Low. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $1000 (parts and labor)
Best-selling code reader on Amazon. Reads and clears check engine codes on any 1996+ vehicle. Under $30.
Essential for diagnosing sensor codes, checking voltage, and testing circuits. Under $15 and pays for itself on the first job.
Affiliate links — we earn a commission at no extra cost to you.
Common Symptoms
- Check Engine Light illuminated
- EGR cooler not functioning properly
- Elevated exhaust temperatures
- Reduced engine performance
- Possible coolant loss through EGR cooler
Probable Causes (Ranked by Likelihood)
- Short to ground in EGR cooler valve wiring Very High
- Failed EGR cooler valve solenoid (shorted) High
- Corroded connector causing low resistance Moderate
- ECM driver circuit fault Low
Frequently Asked Questions
Can I drive with code P2426?
Short distances only. Monitor coolant levels closely as EGR cooler issues on diesel engines can lead to coolant loss and overheating.
What causes P2426?
Usually a shorted EGR cooler valve or damaged wiring. On diesel trucks, check for EGR cooler leaks which are a common related failure.
Is P2426 expensive to fix?
Costs range from $200 to $1000. The valve itself is moderate but if the EGR cooler is also leaking, full cooler replacement adds significant cost.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Measure EGR cooler valve solenoid resistance
-
Check wiring for shorts to ground
-
Inspect connector for corrosion or water damage
-
Check EGR cooler for internal leaks (white smoke indicator)
-
Verify ECM output to the valve with a test light
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-350 6.4L Diesel
- 2011-2019 Ford F-350 6.7L Diesel
- 2010-2018 Ram 3500 6.7L Diesel
- 2012-2020 Chevrolet Silverado 2500 Duramax
Related Codes
Explore More
Was this helpful?
Send this to whoever is fixing the car — your mechanic, or the person asking what the light means.