LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2014 >> Prius Plug-in >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Code (P0010 - P0300)) - PRIUS (Plug-In) >> SFI System >> DTC P0171: System Too Lean (Bank 1); DTC P0172: System Too Rich (Bank 1) [10/2013 - ] >> Typical Malfunction Thresholds
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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)