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)
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What Are the Symptoms of P2427?
- Check Engine Light illuminated
- EGR cooler bypass not functioning
- Engine running hotter than normal under load
- Increased NOx emissions
- Failed emissions inspection
What Causes P2427? (Most Likely First)
- 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
Can I Still Drive with P2427?
Short distances only. P2427 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
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
How Do You Diagnose P2427?
-
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
Which Vehicles Commonly Get P2427?
- 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
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