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O2 Sensor Post Cat seems sus...

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292 views 1 reply 2 participants last post by  alpinegreenneon  
#1 ·
What do you guys think? Engine is warm at this point and at idle. Dropped to 0.2v twice and 0.3v once. Went up to 0.82v.
Oh and no engine light, 1 month old oil and at a good level.

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#2 ·
If you have no codes for the downstream O2 sensor, your PCM "thinks" it's okay.
If it isn't broke, don't fix it. But old sensors can get lazy. That said, in the future, use only Mopar or NTK O2 sensors. If you replace one you should actually replace both.