P0401

2017-10-10

Description:

  • The fault code P0401 indicates that there is an issue with the Exhaust Gas Recirculation (EGR) system. Specifically, the EGR flow is insufficient, which can cause a variety of engine problems.

Possible Symptoms:

  • Illuminated check engine light

  • Poor acceleration or reduced engine power

  • Rough idle or stalling

  • Increased emissions output

Possible Causes:

  • Failed EGR valve

  • Clogged EGR passages

  • Faulty EGR temperature sensor

  • Wiring or connection issues in the EGR system

  • Failed engine control module (ECM)

Related Parts:

  • Exhaust Gas Recirculation (EGR) Sensor: Exhaust gas recirculation (EGR) is an emissions reduction technique used in petrol and diesel engines. Problems lead to harmful emissions out of limit

Possible Solutions:

  • Replace the EGR valve

  • Clean or replace clogged EGR passages

  • Replace faulty EGR temperature sensor

  • Check and repair any damaged wiring or connections in the EGR system

  • Replace the engine control module (ECM) if necessary

Search