threw the code on my 92 hatch with a 89 b16a after hot rodding around some back mountain roads for a while. i was pretty low on fuel. i refueled and the light immediately went away and hasn't come back... hmmmm


wtf does heated o2 mean? the sensor is getting too hot? simple as that?

 

there was intermittently a problem with the o2 sensor heater circuit.. it's possible maybe the sensor is on its way out.. OR if your wiring is modified, it could be possible there's a problem in the wiring somewhere..

 

the latter is more likely... damnit.

o2 heater circuit, huh? i dont have an o2 heater do i? not much on the car anymore after the swap. and the car was well warmed up for about 15 minutes already