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P0139 Diagnostic Trouble Code Discussion for August 2014

Heated Oxygen Sensor (Bank 1 Sensor 2) Slow Response

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Trouble Ticket Help Requests for DTC P0139
Help Request Posted
2007 Kia Sportage LX 2.7L MIL Lamp on VIN: KNDJE72317
P0139: b1s2 slow response. ... a po420 code so I replaced the bank 1 cat and both o2 sensors. car came back with a p0139 o2 sensor b1s2 slow response so I replaced the downstream o2 again the sensor has full range 0 to 1 volt and hangs steady at around .7v crusing down the highway. on d...
August 12, 2014