P0400

2017-10-10

Description:

  • The fault code P0400 indicates that there is a malfunction in the Exhaust Gas Recirculation (EGR) system that may cause the engine to run poorly or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Rough idle or stalling

  • Reduced engine power or acceleration

  • Increased emissions

Possible Causes:

  • Clogged or dirty EGR valve

  • Malfunctioning EGR valve

  • Failed EGR solenoid

  • Faulty wiring or connections in the EGR system

  • Loose or corroded electrical connections

  • 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:

  • Clean or replace the EGR valve

  • Replace the EGR solenoid

  • Check and repair any damaged wiring or connections

  • Tighten or clean any loose or corroded electrical connections

  • Replace the engine control module (ECM) if necessary

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