DSD Information System
Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 63 (Engine Control System (A25A-FXS) - Diagnostic Codes (P0171-P0190)) >> SFI System >> DTC P0171-00: System Too Lean Bank 1; DTC P0172-00: System Too Rich Bank 1; DTC P1170-00: Fuel Performance/Port Injector; DTC P117B-00: Fuel Performance/Direct Injector [11/2023 - ] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

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P0171 AND P0172: FUEL-TRIM LEAN/RICH

EVAP 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)
P1170: FUEL TRIM (PORT INJECTION FAIL)

DTCs of fuel system have already been set -
EVAP purge-cut Executing
Direct injection 100%
Both of the following conditions are met 1 and 2
1. Average between short-term fuel trim and long-term fuel trim Less than 35% (varies with engine coolant temperature)
2. Average between short-term fuel trim and long-term fuel trim Higher than -35% (varies with engine coolant temperature)
P117B: FUEL TRIM (DIRECT INJECTION FAIL)

DTCs of fuel system have already been set -
EVAP purge-cut Executing
Port injection 100%
Both of the following conditions are met 1 and 2
1. Average between short-term fuel trim and long-term fuel trim Less than 35% (varies with engine coolant temperature)
2. Average between short-term fuel trim and long-term fuel trim Higher than -35% (varies with engine coolant temperature)
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