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Home >> Scion >> 2009 >> tC Automatic >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> 2AZ-FE Engine Control System >> SFI System >> DTC P0171 System Too Lean (Bank 1); DTC P0172 System Too Rich (Bank 1) >> Typical Enabling Conditions

Typical Enabling Conditions

TYPICAL ENABLING CONDITIONS CHART

Monitor runs whenever the following DTCs are not present P0128 (Thermostat)
P0136, P0137, P0138, P0139 (HO2 sensor)
P0420 (Catalyst)
P0505 (Idle speed control)
P050A (Cold start strategy)
P2195, P2196 (A/F sensor)
P2237, P2238 (A/F sensor)
P2A00 (A/F sensor)
Fuel system status Closed-loop
Battery voltage 11 V or more
Either of the following conditions A or B is met. -
A. Engine RPM Below 1, 100 rpm
B. Intake air amount per revolution 0.22 g/rev or more
Catalyst monitor Not executed