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Home >> Mitsubishi >> 2002 >> Lancer ES, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0171: System Too Lean >> Description

DTC P0171: System Too Lean: Description

If a malfunction occurs in the fuel system, the fuel trim value becomes too large. The ECM (M/T) or PCM (A/T) checks whether the fuel trim value is within a specified range.

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