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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 417 (Engine Controls - Self Diagnostics - 6.6L) >> Diagnostic Tests >> DTC P0401: EGR System - Insufficient Flow >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2003 GMC Sierra, 2003 GMC Cab & Chassis Sierra, 2003 Chevrolet Silverado, and 2003 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the MAF sensor for proper operation. An inaccurate MAF sensor signal may cause this DTC to set. If the condition is determined to be intermittent, see INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.

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