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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 100 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0136 Or DTC P0156 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2003 Lexus SC 430. However, it is still accessible from the selected car via links, so may be relevant.

The oxygen sensor monitors exhaust gas oxygen content and delivers an input signal to ECM. ECM uses this input signal to determine fuel injection system operation. Sensors include heater.

DTC P0136 is for bank 1, sensor 2. DTC P0156 is for bank 2, sensor 2. DTC is set when sensor voltage remains at .4 volt or more or .5 volt or less during vehicle operation at 19 MPH or more, once engine is at normal operating temperature. Possible causes are:

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