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Home >> Lexus >> 2007 >> ES 350 >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System - DTC P0171 - P0604 >> DTC P0171, P0172, P0174, P0175: System Too Lean (Bank 1); System Too Rich (Bank 1); System Too Lean (Bank 2); System Too Rich (Bank 2) >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

Fuel trim: 

TYPICAL MALFUNCTION THRESHOLDS FUEL TRIM

EVAP purge-cut Executing
Either following condition is met Condition 1 or 2
Average between short-term fuel trim and long-term fuel trim 35% or more at 80°C (176°F) of ECT
Average between short-term fuel trim and long-term fuel trim -35% or less at 80°C (176°F) of ECT
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