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Home >> Ford >> 2017 >> Transit Connect XL, Van Cargo >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Diagnostic Methods (Except Diesel & Hybrid) >> Adaptive Fuel Diagnostic Trouble Code (DTC) Diagnostic Techniques >> DTCs P0171 and P0174 System Too Lean Diagnostic Aids

DTCs P0171 and P0174 System Too Lean Diagnostic Aids

NOTE: If the system is lean at certain conditions, then the LONGFT PID would be a positive value at those conditions, indicating that increased fuel is needed.

The ability to identify the type of lean condition causing the concern is crucial to diagnosis.

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