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Home >> Toyota >> 2007 >> Prius Base >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> SFI System >> DTC P0171 System Too Lean (Fuel Trim); DTC P0172 System Too Rich (Bank 1) >> Typical Enabling Conditions
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Typical Enabling Conditions

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present P0010 (VVT OCV)
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, P0341 (CMP sensor)
P0351 - P0354 (Igniter) P0500 (VSS)
Battery voltage 11 V or more
Fuel system status Closed-loop
Either of the following conditions is met: (a)or(b)
(a) Engine speed Less than 1,100 rpm
(b) Intake air amount per revolution 0.22 g/rev or more