Circuit Description

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

NOTE:

Detecting condition for DTC P0136 is when the heated oxygen sensor No. 2 output voltage remains 0.2 V or more or when the heated oxygen sensor No. 2 output voltage remains 0.6 V or less under active air-fuel ratio control.
Detecting condition for DTC P0137 is when the heated oxygen sensor No. 2 output voltage is less than 0.25 V and the target air-fuel ratio is RICH under active air-fuel ratio control.
Detecting condition for DTC P0138 is when the heated oxygen sensor No. 2 output voltage is 0.59 V or more and the target air-fuel ratio is LEAN under active air-fuel ratio control.

For circuit description, see Fig 1-Fig 3 .

Fig 1: DTCs P0136-P0138 Circuit Description (1 Of 3)

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Fig 2: DTCs P0136-P0138 Circuit Description (2 Of 3)

Fig 3: DTCs P0136-P0138 Circuit Description (3 Of 3)