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Home >> Toyota >> 2009 >> Matrix Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (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

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
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)