P1408 - Exhaust Gas RECIRCULATION (EGR) Flow Out Of Self-Test Range (Non-Mil)
WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2007 Mercury Mountaineer, 2007 Mercury Monterey, 2007 Mercury Montego, 2007 Mercury Milan, and 2007 Mercury Mariner. 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 (NON-MIL)
| 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: | For EEGR, use the output state control function of the scan tool and monitor the manifold absolute pressure (MAP) PID and the EEGR PID (EGRMDSD) while commanding the EEGR on. If EGR is introduced into the engine at idle, the RPM drops or stalls out. For vacuum systems see diagnostic aids for DTC P0401. | |||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory | |
| Vehicles With an Electric EGR (EEGR) | - | refer to PINPOINT TEST KD . | - | |
| Vehicles with an EGR system module (ESM) | - | refer to PINPOINT TEST HH . | - | |
| All others | - | refer to PINPOINT TEST HE . | - | |