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Home >> Toyota >> 2004 >> Matrix Base, FWD, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 134 (Engine Control System Self Diagnostics - V6) >> Diagnostic Tests >> DTC P0171: System Too Lean Or DTC P0172: System Too Rich >> Possible Causes
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Possible Causes

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

For DTC detection conditions and possible causes, see Fig 1.

Fig 1: DTCs P0171 & P0172 Detecting Conditions & Possible Causes
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