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Home >> Lexus >> 2003 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0136 Or DTC P0156 >> Circuit Description
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Circuit Description

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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