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Home >> Lexus >> 2000 >> ES 300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0136: Heated Oxygen Sensor Circuit >> Circuit Description

Circuit Description

Heated oxygen sensor monitors exhaust gas oxygen content and delivers an input signal to ECM. ECM uses input signal to determine fuel injection system operation. Heated oxygen sensors include a heater. DTC is set when bank No. 1, sensor No. 2 voltage remains at .4 volt or more, or .6 volt or less during vehicle operation (31 MPH or more), once engine is at normal operating temperature. Possible cause is:

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