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P0403 - EGR A Control Circuit/Open

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DTC DESCRIPTION P0403 - EGR A CONTROL CIRCUIT/OPEN

Description:  The exhaust gas recirculation (EGR) system is continuously monitored to check the four electric EGR motor coils, circuits, and the PCM for opens, shorts to voltage and ground. If a concern is detected, the EGR system is disabled and additional monitoring is suspended for the remainder of the drive until the next drive cycle.
Possible Causes: 
  • Electric EGR stepper motor windings open
  • Electric EGR connector not seated correctly
  • EGRMC circuit open
  • EGRMC circuit short to voltage
  • EGRMC circuit short to ground
Diagnostic Aids:   
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test KD.
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