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Home >> Toyota >> 2011 >> Avalon Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System SFI System (Diagnostic Codes (P0136 - P0441)) >> SFI System >> DTC P0171: System Too Lean (Bank 1) (FROM 12/2010); DTC P0172: System Too Rich (Bank 1) (FROM 12/2010); DTC P0174: System Too Lean (Bank 2) (FROM 12/2010); DTC P0175: System Too Rich (Bank 2) (FROM 12/2010) >> Typical Malfunction Thresholds
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Typical Malfunction Thresholds

FUEL TRIM:

EVAP purge-cut Executing
Either of the following conditions is met Condition 1 or 2
1. Average between short-term fuel trim and long-term fuel trim 35% or more (varies with ECT)
2. Average between short-term fuel trim and long-term fuel trim -35% or less (varies with ECT)