P0408

2017-10-10

Description:

  • The fault code P0408 indicates that there is an issue with the circuit that controls the EGR sensor B. This may cause the engine to run poorly or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Engine runs poorly or not at all

  • Reduced engine power or acceleration

  • Rough idle or stalling

Possible Causes:

  • Faulty EGR sensor "B"

  • Corroded or damaged wires or connections in the circuit

  • Failed engine control module (ECM)

  • Malfunctioning EGR valve

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 sensor "B"

  • Check and repair any damaged or corroded wires or connections in the circuit

  • Replace the engine control module (ECM) if necessary

  • Clean or replace the EGR valve if it is malfunctioning

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