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DTC P0400: Exhaust Gas RECIRCULATION (EGR) Flow System Malfunction
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Probable Causes
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Probable Causes
EGR valve does not open.
EGR control vacuum is too low.
EGR solenoid failed.
Open or short in EGR solenoid circuit, or loose connector.
Manifold Differential Pressure (MDP) sensor failed.
Engine Control Module (ECM) failed.