DTC P1408: EGR Flow Out Of Self-Test Range (Non-Mil)
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.
P1408 - EGR FLOW OUT OF SELF-TEST RANGE (NON-MIL)
| Description: | This test is performed during the KOER on-demand self-test only. The EGR system is commanded on at a fixed engine speed. The test fails and the DTC is output when the measured EGR flow falls above or below the required calibration. | ||
| Possible Causes: | See possible causes for DTC P0400. | ||
| Diagnostic Aids: | For electric EGR, use the output state control function of the diagnostic tool and monitor the MAP PID (MAP) and the EEGR PID (EGRMDSD) while commanding the EEGR on. If EGR is introduced into the engine at idle, the RPM will drop or stall out. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | - | GO to Pinpoint Test KD . | - |