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i had o2 code p0139. changed bank 2 o2 sensor, code has come back
Vehicle: 2007 hyundai elantra 2.0

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HI there

This can usually be caused by several different issues. Here is a lost of possible causes for this code.

P0139 HYUNDAI - HO2S Circuit Slow Response Bank 1 Sensor 2

Read more: https://www.autocodes.com/p0139_hyundai.html

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