Hondata

Do anyone knows which reistance of heater is on oem wideband a/f sensor ?
On non wideband it is 2.1-2.9 Ohm, if some one have a working oem wideband a/f sensor, measure the resistance between black wires.

I measured about 1 ohm when cold, but it goes up quickly as it gets hot. Said another way, it does not draw 12V / 1 ohm - 12 amps!

kb58 wrote:I measured about 1 ohm when cold, but it goes up quickly as it gets hot.

Ou. So it seems that my a/f sensor is o.k., cause i have a new one and measured the resistance in a room temperature, and it is 1ohm....

kb58 wrote: Said another way, it does not draw 12V / 1 ohm - 12 amps!

I can not figure out what do you mean by last words: "it does not draw "...

I mean it's only 1 ohm at room temperature. As it heats up, its resistance goes up, too. If you apply 12V to the heater wires for just a second (it gets hot really fast, so be careful) and measure the resistance, it'll be much higher. So at that higher temperature and resistance, it no longer draws as much current as it did at room temp, that's all.

kb58, thank you! Now i`am sure that my O2 sensor is o.k..