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Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 471 (Engine Controls - Diagnostics) >> Circuit Inspection >> DTC P0171: System too Lean (Bank 1), DTC P0172: System too Rich (Bank 1) >> Typical Enabling Conditions
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Typical Enabling Conditions

WARNING: This page is about a different car, the 2004 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present See PRE-CHECK 
Battery voltage 11 V or more
Fuel system Closed Loop (for 13 sec. or more)
Warm-up condition to enable air fuel ratio learning control The conditions are met
Either of the following conditions is met: -
Engine RPM Less than 1,100 RPM
Intake air amount per revolution 0.22 g/rev or more