P04D8

2017-10-10

Description:

  • Excessive Time To Enter Closed Loop EGR Control

Possible Symptoms:

  • Check and clean the EGR valve and passages

  • Inspect and repair any vacuum leaks in the EGR system

  • Replace the EGR valve if necessary

  • Perform a thorough engine tune

  • up, including spark plug replacement and fuel system cleaning

  • If all else fails, check the engine control module (ECM) for any error codes or malfunctions

Possible Causes:

  • Faulty EGR valve

  • Clogged EGR passages

  • Malfunctioning EGR control solenoid

  • Engine vacuum leak

  • Dirty or malfunctioning mass airflow sensor

Related Parts:

Possible Solutions:

  • Engine hesitation or rough idle

  • Decreased fuel efficiency

  • Engine stalling or misfiring

  • Reduced engine power or acceleration

  • Check engine light illuminated

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