O2 p0136 malfunction P0136 code: o2 sensor circuit (bank 1, sensor 2) O2 sensor codes, replaced and recode.
Check Engine Lights and O2 Sensor Codes - YouFixCars.com
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Check Engine Lights and O2 Sensor Codes - YouFixCars.com
O2 Sensor Codes, replaced and recode. - Ford Truck Enthusiasts Forums
O2 Sensor wiring quick tests (Ford with no bias voltage) - YouTube