P0403

2017-10-10

Description:

  • The fault code P0403 indicates that there is an issue with the circuit that controls the Exhaust Gas Recirculation (EGR) system. This may cause the engine to run poorly or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Reduced engine power or acceleration

  • Rough idle or stalling

  • Engine hesitation during acceleration

Possible Causes:

  • Failed EGR valve

  • Wiring or connections in the circuit are damaged or faulty

  • 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:

  • Replace the EGR valve

  • 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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