DTC P0136 - Heated Oxygen Sensor Circuit (Sensor No. 2): Condition

DTC is set when sensor No. 2 voltage remains at .40-.55 volt during vehicle operation (25 MPH or more), once engine is at normal operating temperature. Possible causes are:

Heated oxygen sensor.

NOTE: Oxygen sensor located in front of catalytic converter is referred to as sensor No. 1. Oxygen sensor located behind front catalytic converter is referred to as sensor No. 2.