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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 421 (Engine Control System Self-Diagnostics - 3.8L) >> Diagnostic Tests >> DTC P0404: EGR Open Position Performance >> Diagnostic Aids

Diagnostic Aids

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Check for excessive deposits on EGR pintle or seat. Remove EGR valve and inspect for deposits that may interfere with EGR valve pintle extending completely or cause pintle to stick.

If the problem is intermittent, See INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.

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