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Home >> Jeep >> 2003 >> Wrangler SE, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0171: 1/1 Fuel System Lean Or DTC P0174: 2/1 Fuel System Lean >> Monitored & Set Conditions

Monitored & Set Conditions

Fuel system lean condition is monitored with the engine running in closed loop mode, the ambient/battery temperature above 20°F (-7°C) and altitude below 8000 ft. DTC will set if the PCM multiplies short term compensation by long term adaptive and a certain percentage is exceeded for two trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored.