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Home >> Toyota >> 2015 >> Avalon Hybrid Limited >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> SFI System - Diagnostic Codes - (Hybrid) (1 Of 4) >> SFI System >> DTC P0171: System Too Lean (Bank 1); DTC P0172: System Too Rich (Bank 1) [10/2014 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

FUEL TRIM

Purge-cut Executing
Either of the following conditions is met 1 or 2
1. Average between short-term fuel trim and long-term fuel trim 35% or higher (varies with engine coolant temperature)
2. Average between short-term fuel trim and long-term fuel trim -35% or less (varies with engine coolant temperature)