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P0139 OBD-II Trouble Code: O2 Sensor Circuit Slow Response (Bank 1, Sensor 2)
P0139 code definition O2 Sensor Circuit Slow Response (Bank 1, Sensor 2) What the P0139 code means P0139 is the OBD-II generic code indicating that the O2 sensor for bank 1...

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Problem with Check Engine light in my dashboard.
Hi and thanks for your question. The code P0139 means that the secondary oxygen sensor on bank 1 (the sensor after the catalytic converter) is not damaged, but rather the engine air fuel ratio is not being adjusted by the...
After sensor replacement, 2nd diagnostic revealed P0139
No, it is not the catalyst. The P0139 code is for the O2 sensor before the catalyst. The code is illuminated when the engine control module is testing the O2 sensor and it cuts the fuel to see if the...
Car idles and multiple trouble codes are triggered
Hi there. If this vehicle is having an idle concern, I have to ask if you may be having a stumble or stall issue when coming to a stop. If so, your vehicle may be covered under a special...

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