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Home >> Toyota >> 2004 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 131 (Engine Control System Self Diagnostics) >> Diagnostic Tests >> DTC P0171: System Too Lean Or DTC P0172: System Too Rich >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2003 Toyota Prius. However, it is still accessible from the selected car via links, so may be relevant.

For circuit description, see Fig 1.

Fig 1: DTCs P0171 & P0172 Circuit Description
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