O2 sensor probs.

[Aarong23]

My truck threw a code for the o2 sensor, bank 1 sensor 2. It said there was no activity. Replaced the sensor, now it says bank 1 is running too rich. Any ideas what this could be?

 

[toomanyhobbies]

Is your truck stock and what brand are you using?


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[Supercharged111]

Running rich may have killed the first one.