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P139C - EGR Sensor C Downstream Hose Off Or Plugged

DTC DESCRIPTION P139C - EGR SENSOR C DOWNSTREAM HOSE OFF OR PLUGGED

Description:  At idle, the exhaust gas recirculation (EGR) monitor commands the EGR valve closed and checks the differential pressure across the EGR tube orifice which should be zero to indicate the hoses are connected and not restricted. This DTC sets when the differential pressure indicated by the sensor exceeds a maximum threshold or falls below a minimum threshold.
Possible Causes: 
  • The downstream hose is disconnected
  • The downstream hose is restricted
  • Restricted or damaged EGR tube
Diagnostic Aids:  Look for signs of water or icing in the hose. Verify the hose connection and routing. Check the differential pressure feedback EGR sensor for correct mounting and function.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test HE.
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