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Home >> Lexus >> 2004 >> IS 300 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 57 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P0136: Oxygen Sensor Circuit Fault (Bank 1 Sensor 2) Or DTC P0156: Oxygen Sensor Circuit Fault (Bank 2 Sensor 2) >> Circuit Description
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Circuit Description

WARNING: This page is about a different car, the 2003 Lexus LX 470. However, it is still accessible from the selected car via links, so may be relevant.

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 P0136 is set when bank 1, sensor 2 voltage remains at .4 volt or more, or .5 volt or less during vehicle operation (62 MPH or less), once engine is at normal operating temperature. DTC P0156 is set when bank 2, sensor 2 voltage remains at .4 volt or more, or .5 volt or less during vehicle operation (62 MPH or less), once engine is at normal operating temperature. Possible causes are:

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