P0402

2017-10-10

Description:

  • The fault code P0402 indicates that the Exhaust Gas Recirculation (EGR) flow is excessive. This may cause the engine to run poorly or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Poor engine performance

  • Rough idle or stalling

  • Engine knocking or pinging

  • Reduced fuel efficiency

Possible Causes:

  • Clogged or dirty EGR valve

  • Faulty EGR solenoid

  • Malfunctioning EGR temperature sensor

  • Leaks in the EGR system

  • Faulty 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

  • Test and replace the EGR solenoid if faulty

  • Replace the EGR temperature sensor if necessary

  • Check and repair any leaks in the EGR system

  • Replace the engine control module (ECM) if required

Search