LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2010 >> Matrix S, FWD, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control (SFI) System (2AZ-FE) (Diagnostic Codes (DTC P0010 - DTC P0443)) >> SFI System >> DTC P0171: System Too Lean (Bank 1); DTC P0172: System Too Rich (Bank 1) >> Typical Enabling Conditions
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Typical Enabling Conditions

FUEL-TRIM

Monitor runs whenever following DTCs not present P0010 (VVT Oil Control Valve Bank 1)
P0011 (VVT System bank 1 - Advance)
P0012 (VVT System bank 1 - Retard)
P0016 (VVT System bank 1 - Misalignment)
P0031, P0032 (Air Fuel Ratio Sensor Heater - Sensor 1)
P0102, P0103 (Mass Air Flow Meter)
P0115, P0117, P0118 (Engine Coolant Temperature Sensor)
P0120, P0121 P0122, P0123, P0220, P0222, P0223, P2135 (Throttle Position Sensor)
P0125 (Insufficient Engine Coolant Temperature for Closed Loop Fuel Control)
P0335 (Crankshaft Position Sensor)
P0340 (Camshaft Position Sensor)
P0351, P0352, P0353, P0354 (Igniter)
P0500 (Vehicle Speed Sensor)
Fuel system status Closed-loop
Battery voltage 11 V or more
Either of following conditions 1 or 2 set -
1. Engine RPM Below 1100 rpm
2. Intake air amount per revolution 0.22 g/rev or more
Catalyst monitor No executed
scientia non olet · About LEMON Manuals