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P0139 Diagnostic Trouble Code Discussion for March 2005

Heated Oxygen Sensor (Bank 1 Sensor 2) Slow Response

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Trouble Ticket Help Requests for DTC P0139
Help Request Posted
1999 Mercury Villager 3.3L MIL Lamp on VIN: 4MZXV11T6X
P0139: Heated Oxygen Sensor (Bank 1 Sensor 2) Slow Response. Tested the scan data on our scan tool and the voltage on the rear sensor stays at .29 volts. The front sensor has a good sweep and is very active. I tried to get a responce from the sensor under full throttle and deceleration, but it stays right at .29 volts. ...
March 18, 2005