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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 115 (Engine Control System Self Diagnostics - 4-Cylinder) >> Diagnostic Tests >> DTC P0171: System Too Lean (Bank No. 1) & DTC P0172: System Too Rich (Bank No. 1) >> Circuit Description & Possible Causes

Circuit Description & Possible Causes

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

For circuit description and possible causes, see Fig 1.

Fig 1: DTC P0171 & P0172 Circuit Description & Possible Causes
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