P0401Restriction in the EGR passages usually caused by carbon buildup, The EGR Valve is defective, Lack of proper vacuum or electrical signal to the EGR valve, Malfunctioning EGR Vacuum supply sol
El sistema EGR no circula suficientes gases de escape. Aumenta las emisiones de NOx.
View on another brand:
Can I keep driving? With caution
You can drive to the shop, but do not postpone the repair. The problem may worsen and damage other components.
Sistema Afectado
Sistema de Escape · Catalizador y sensores O₂
La falla se localiza en la línea de escape: catalizador, sondas lambda (O₂) o sistema EGR.
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Symptoms You Will Notice
What you may observe when this code appears
- Golpeteo del motor
- Aumento de emisiones
- Rendimiento reducido a baja velocidad
Possible Causes
The components or conditions that trigger this code
- 1Válvula EGR obstruida con carbón
- 2Conductos de EGR tapados
- 3Sensor de posición EGR defectuoso
- 4Solenoide EGR dañado
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Limpiar válvula EGR con limpiador de carburador.
- 2Limpiar conductos de recirculación.
- 3Verificar funcionamiento del solenoide.
- 4Reemplazar válvula si es necesario.
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Varies by diagnosis
* Diagnosis only: $50–$150
Quick Info
Dig Deeper
Videos, images and service manuals
Have Another Code?
Look it up directly: