DTC P1408: Exhaust Gas RECIRCULATION (EGR) Flow Out Of Self-Test Range
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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 this DTC sets 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 |
| E-Series 4.6L, Mustang 5.8L |
GO to PINPOINT TEST HH . | ||
| All others | GO to PINPOINT TEST KD . | ||