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.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $200 - $800 (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 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
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.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Check if the EGR cooler valve connector is plugged in
-
Measure solenoid coil resistance (should not be infinite)
-
Inspect wiring for open circuits
-
Verify voltage at the valve connector with key on
-
Check for engine harness damage from heat or vibration
Sources 2
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)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Commonly Affected Vehicles
- 2011-2019 Ford F-250 6.7L Powerstroke
- 2010-2018 Ram 2500 6.7L Cummins
- 2012-2020 GM 2500HD 6.6L Duramax
- 2013-2021 Nissan Titan XD Diesel
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.