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Home >> Pontiac >> 2005 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls - 3.8L - DTC P0137 To DTC P0405) >> DTC P0401 >> Conditions for Setting the DTC

Conditions for Setting the DTC

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The MAP changes monitored by the PCM during the EGR flow tests indicate an insufficient amount of EGR flow.