P1408 - Exhaust Gas RECIRCULATION (EGR) Flow Out Of Self-Test Range
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2007 Ford RV Cutaway, 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Econoline. 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: |
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| Diagnostic Aids: | Use the output state control function of the scan tool and monitor the EGRVP PID while commanding the EGR actuator 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 | refer to PINPOINT TEST W . | |||