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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1341 (Engine Controls - Powertrain DTC Charts & Descriptions - (Hybrid)) >> DTC Diagnosis >> DTC P0400: EGR Flow Failure (Outside Minimum Or Maximum Limits)

DTC P0400: EGR Flow Failure (Outside Minimum Or Maximum Limits)

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
P0400 - EGR FLOW FAILURE (OUTSIDE MINIMUM OR MAXIMUM LIMITS)

Description:  The EEGR system is monitored once per drive cycle during steady state conditions above 77 km/h (48 mph). The test fails when a malfunction is detected by PCM calculations indicating the EGR flow is less or greater than expected.
Possible Causes: 
  • EEGR valve stuck open or closed.
  • Connector to EEGR not seated.
  • EEGR motor windings shorted or open circuit.
  • No power to the EEGR.
  • Harness open or shorted to power or ground.
  • Vacuum signal to MAP restricted or leaking.
  • Mass air flow (MAF) sensor signal erroneous.
  • Damaged PCM.
  • Carbon build up in the EEGR valve seat area.
  • One or more sensors is not responding or is out of range.
Diagnostic Aids:  All of the following sensors input data to the PCM for proper operation of the EEGR system: CHT, IAT, MAF, TP, MAP. Any DTC relating to these sensors must be resolved prior to addressing code P0400.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test KD .
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