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Discussion Starter #1
on our 94 ex d16z6??i think thats what it is cant remember but im getting code 41 off the ecu = oxygen sensor heater what the hell is that and where is it what does it do, how come ive never heard of it anyone know
 
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what did you do to your car recently? it's the o2 sensor in general i believe.

but when did this code first start appearing. what exactly have you done to your car?
 

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Discussion Starter #4
yeah i figured it out if you got a 4 wire o2 sensor than the sensor has a heater the cars got a cat back and short ram intake and a ground wire kit thats it and the light just came on out of nowhere-then when i went to replace the sensor whoever put the last one in didnt screw it in they just hammered in there so i had to cut the old one out and re-tap the threads what a headache
 
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obd1 cars and up have heaters, i forgot which color wire it is.

it heats the o2 up faster to achieve closed loop faster, on obd0 cars the o2 would have to wait till the exhuast warms it up and it would take a longer than a heated o2 to get into closed loop

the o2 needs to get up to 600degrees to be in fuel control(closed loop)
 
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