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Home >> Scion >> 2008 >> tC Base, Standard >> 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

Monitor runs whenever the following DTCs are not present P0010 (VVT OCV Bank 1)
P0011 (VVT System 1 -Advance)
P0012 (VVT System 1 - Retard)
P0031, P0032 (A/F sensor heater - Sensor 1)
P0100 - P0103 (MAF meter)
P0115 - P0118 (ECT sensor)
P0120 - P0223, P2135 (TP sensor)
P0125 (Insufficient ECT for Closed Loop)
P0335 (CKP sensor)
P0340 (CMP sensor)
P0500 (VSS)
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