DTC P1408: Exhaust Gas RECIRCULATION (EGR) Flow Out Of Self-Test Range
WARNING: This page does not describe the selected car, but rather 33 other vehicles, including the 2010 Mercury Mountaineer, 2010 Mercury Milan, 2010 Mercury Mariner, 2010 Mercury Grand Marquis, and 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
DTC 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: | |||
| 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 |
| Escape/Mariner, Focus, Fusion 2.5L, Fusion 3.0L, Milan, Ranger 2.3L, Transit Connect |
- | GO to PINPOINT TEST KD . | - |
| Crown Victoria, E-Series, Explorer 4.0L, Explorer Sport Trac 4.0L, F-150 4.6L 2V, F-Super Duty 6.8L, Grand Marquis, Mountaineer 4.0L, Mustang 4.0L, Mustang 5.4L, Town Car |
- | GO to PINPOINT TEST HH . | - |
| All others | - | GO to PINPOINT TEST HE . | - |