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P0139 Diagnostic Trouble Code Discussion for December 2007

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 (Van) Estate 3.3L MIL Lamp on VIN: 4M2XV11T9X
P0139: O2 Sensor circuit slow response bank 1 sensor 2. I replaced the rear 02 sensor and of course the problem is still there. Scan tool reads a constant .300 volts, even after 10 minutes of driving. Power to the heater circuit is good, but at no time will the computer ground the heater. Tested front 02 sensor and...
December 19, 2007
1999 Mercury Villager (Van) Estate 3.3L MIL Lamp on VIN: 4M2XV11T9X
P0139: O2 Sensor circuit slow response bank 1 sensor 2. I replaced the rear 02 sensor and of course the problem is still there. Scan tool reads a constant .300 volts, even after 10 minutes of driving. Power to the heater circuit is good, but at no time will the computer ground the heater. Tested front 02 sensor and...
December 19, 2007