LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2013 >> IS 350C Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Engine Control System (Diagnostic Codes (P0010-P0175))) >> 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
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Typical Malfunction Thresholds

WARNING: This page is about a different car, the 2013 Lexus IS 250C. However, it is still accessible from the selected car via links, so may be relevant.
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 engine coolant temperature)
2. Average between short-term fuel trim and long-term fuel trim -35% or less (varies with engine coolant temperature)