02 sensor question

[Brahmajoe]

Is it possible for an Oxygen Sensor to get voltage and fluctuate voltage as designed but still have the heater element fail?

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[Hootbro]

Is it possible for an Oxygen Sensor to get voltage and fluctuate voltage as designed but still have the heater element fail?

In theory yes, but I would expect a CEL with a failed O2 Sensor heater control code posting.

Edit: I would also add that I am not 100% certain on Jeep/Chrysler vehicles, but I know some vehicle will shut down the PCM sending and receiving signals from a failed heater sensor and internally substitute values within the PCM for that sensor. Either way, there should still be a CEL and code set.

 

[Minty JL]

^^ Bingo

If its a downstream O2 you'll get several codes with the CEL. I call look up the ones I got later

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