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Home >> Mazda >> 2000 >> Protege ES, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 1.8L >> Diagnostic Trouble Code Tests >> DTC P0401: EGR Flow Insufficient >> Condition

DTC P0401: EGR Flow Insufficient: Condition

DTC is set when the difference in intake manifold pressure between open EGR and closed EGR is too small. Possible causes are:

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