Circuit Description

Code is set when bank No. 1, sensor No. 2 voltage remains at .4 volt or more or .5 volt or less during vehicle operation (31 MPH or more), once engine is at normal operating temperature. Possible cause is: Heated oxygen sensor malfunction.

Fig 1: Code P0136 Flow Chart - Heated O2 Sensor Circuit Malfunction (Bank 1, Sensor 2)

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