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Home >> Lexus >> 2006 >> IS 350 >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Control System (2GR-FSE) >> SFI System >> 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

TYPICAL MALFUNCTION THRESHOLDS

Purge-cut Executing
Either of following conditions 1 or 2 is met: -
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 -30 % or less (varies with ECT)
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