DTC P1408: Exhaust Gas RECIRCULATION (EGR) Flow Out Of Self-Test Range

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, 2011 Ford Fusion, 2010 Mercury Milan, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

P1408 - EXHAUST GAS RECIRCULATION (EGR) FLOW OUT OF SELF-TEST RANGE

Description:	This test is carried out during the key ON engine running (KOER) on demand self-test only. The EGR system is commanded on at a fixed engine speed. The test does not pass and the DTC is set when the measured EGR flow falls above or below the required calibration.
Possible Causes:	Electric exhaust gas recirculation (EEGR) valve stuck open or closed EEGR connector not seated correctly EEGR motor windings short or open No voltage to the EEGR Harness open or short to voltage or ground Vacuum signal to manifold absolute pressure (MAP) restricted or leaking Mass air flow (MAF) sensor signal erroneous Carbon build up in the EEGR valve seat area One or more sensors is not responding or is out of range
Diagnostic Aids:	Use the scan tool to monitor the MAP parameter identification (PID) and the EGRPCT PID while commanding the EGR_STEP PID on. If EGR is introduced into the engine at idle, the RPM drops or stalls out.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to PINPOINT TEST KD .