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P0404 - EGR A Control Circuit Range/Performance

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DTC DESCRIPTION P0404 - EGR A CONTROL CIRCUIT RANGE/PERFORMANCE

Description:  This DTC sets when the exhaust gas recirculation (EGR) valve is at a position other than commanded.
Possible Causes: 
  • EGRVCL circuit open
  • EGRVCH circuit open
  • EGRVCL and EGRVCH circuits are cross wired
  • EGRVCL and EGRVCH circuits are shorted together
  • Debris restricting the EGR valve movement
  • Binding or stuck EGR valve
  • Damaged EGR valve
Diagnostic Aids:   
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test KD.
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