DTC P1408: Exhaust Gas RECIRCULATION (EGR) Flow Out Of Self-Test Range (Non-Mil)
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Mariner, and 2006 Mercury Grand Marquis. 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 diagnostic 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 will drop or stall out. For vacuum systems see diagnostic aids for P0401. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Vehicles With an Electric EGR (EEGR) | - | GO to Pinpoint Test KD . | - |
| Vehicles with an EGR system module (ESM) | - | GO to Pinpoint Test HH . | - |
| All others | - | GO to Pinpoint Test HE . | - |