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Rick 1/7/2013
2002 Ford F-150 XL 8 Cyl 5.4L - Engine
P0403 code what is it?
Won't pass pa. Emissions
1 Answer
  • CVO
    CVO 1/7/2013
    Trouble Code: P0403

    EGR Solenoid Circuit Malfunction (ESM System)

    Possible Causes:

    EGR solenoid connector is damaged, loose or shorted
    EGR solenoid control circuit is open, or shorted to ground
    EGR solenoid power circuit is open (check power to relay)
    EGR solenoid is damaged or the PCM has failed.

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