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Home >> Oldsmobile >> 2003 >> Aurora >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0401: EGR Flow Insufficient >> Test Description

Test Description

The number below refers to the step number in the diagnostic procedures.

  1. 2

    MAP sensor faults must be diagnosed first. A skewed MAP sensor reading could cause this DTC to set.
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