Exhaust Gas Recirculation Cooling Valve Control Circuit High
What does P2427 mean?
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.
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
Step-by-Step Diagnostic Procedure
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Check if the EGR cooler valve connector is plugged in
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Measure solenoid coil resistance (should not be infinite)
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Inspect wiring for open circuits
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Verify voltage at the valve connector with key on
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Check for engine harness damage from heat or vibration
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.