P0406

2017-10-10

Description:

  • The fault code P0406 indicates that there is an issue with the Exhaust Gas Recirculation (EGR) system. This code specifically refers to a high voltage reading in the EGR sensor circuit.

Possible Symptoms:

  • Illuminated check engine light

  • Decreased fuel economy

  • Rough idling or stalling

  • Engine knocking or pinging

  • Failed emissions test

Possible Causes:

  • Faulty EGR sensor

  • Wiring issues in the EGR sensor circuit

  • Corrosion or loose connections in the EGR sensor circuit

  • 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 faulty EGR sensor

  • Check and repair any damaged wiring or connections

  • Clean or tighten any corroded or loose connections

  • Replace the Engine Control Module (ECM) if necessary

Search