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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 84 (Engine Control System Self-Diagnostics - 3.1L Engine) >> Diagnostic Tests >> DTC P1404: EGR System (Valve No. 2) >> Diagnostic Aids

Diagnostic Aids

WARNING: This page is about a different car, the 2002 Pontiac Grand Prix, 2002 Chevrolet Malibu, and 2002 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

Inspect for excessive deposits on the EGR valve pintle or seat. Remove EGR valve. Inspect for deposits that may interfere with the EGR valve pintle extending completely or may cause the pintle to stick. If problem is intermittent, refer to INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.

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