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Home >> Buick >> 2000 >> Century Custom >> Repair and Diagnosis >> External Pages >> Different car >> Section 249 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0171: Fuel Trim System Lean, Bank 1 & DTC P0174: Fuel Trim System Lean, Bank 2 >> Conditions For Setting DTC

Conditions For Setting DTC

WARNING: This page is about a different car, the 2003 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

The average long term fuel trim value is above 23 percent and condition is present for 6 seconds.

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