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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 (Engine Control System Self-Diagnostics - 3.8L) >> Diagnostic Tests >> DTC P0171: Fuel Trim System Lean >> Diagnostic Aids

Diagnostic Aids

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System will go lean if an injector is not suppling enough fuel. A lean condition could be present during high fuel demand due to a fuel pump that does not pump enough fuel.

Using a scan tool, review the Failure Records. If an intermittent condition is suspected, see INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.

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