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Home >> Lexus >> 2008 >> LS 600hL >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTC P0120 - P0453 >> DTC P0171: System Too Lean (Bank 1); DTC P0172: System Too Rich (Bank 1); DTC P0174: System Too Lean (Bank 2); DTC P0175: System Too Rich (Bank 2) >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

Fuel-trim: 

TYPICAL MALFUNCTION THRESHOLDS

Purge-cut Executing
When either condition below 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)
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