Pontiac Grand Prix P Codes (Powertrain) P1400 - P1499 P1404

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Recurring EGR Codes P1404 And P0404?

1999 PONTIAC GRAND PRIX
Have Two Reoccurring Codes P1404 And P0404. Leaving Work This Morning The Car Hesitated A Bit While Accelerating And About 30 Minutes Later...
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Asked by Jr47

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