O2 sensor and check engine light

[Garrison]

I have an 04 3.7 l engine w 156k mikes. My check engine light came on. P0139 bank 1, sensor 2. I replaced it. Reset and two days later it came back on. Checked for vacuum leaks, visually inspected connections, no signs of exhaust leaks? Any suggestions?

 

[HoosierJeeper]

Where did you get the new O2 sensor? The KJs tend to only like the Mopar ones...not any aftermarket brands like Bosch or anything like that.

 

[LibertyTC]

Mopar Sensors sure, but I will add also NGK- NTK sensors should be fine in the KJ as well.

 

[jp7794]

Mopar Sensors sure, but I will add also NGK- NTK sensors should be fine in the KJ as well.

Second that. I had the exact same error code and replaced it with this. This resolved the issue permanently.

Amazon.com: NTK 23159 Oxygen Sensor: Automotive

 

[ftaa]

ntk is mopar or oem ... in this case.