O2 sensor's heater bad? `97 Maxima Nissan

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Tibur Waltson - 30 May 2004 08:23 GMT

After testing an oxygen sensor for resistance
the heater circuit reads 24,000,000 ohm. Normally
it should read 4-ohm, correct? I put the connector
back on and back probe the heater 2-pin
and it reads 12V with ignition on. Should I replace
the O2 sensor?

Thanks

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Jim - 30 May 2004 14:46 GMT

> After testing an oxygen sensor for resistance
> the heater circuit reads 24,000,000 ohm. Normally
> it should read 4-ohm, correct? I put the connector
> back on and back probe the heater 2-pin
> and it reads 12V with ignition on. Should I replace
> the O2 sensor?

Yes and yes.

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name - 31 May 2004 05:03 GMT

>> After testing an oxygen sensor for resistance
>> the heater circuit reads 24,000,000 ohm. Normally
[quoted text clipped - 4 lines]
>
> Yes and yes.

If budget is small, he could put a 4 ohm power resistor
in parallel with the heater, to make the computer think
the heater is still good. The sensor will then take longer
to warm up, but the car will probably stil run fine.

Startup emissions might be a tad higher. To make up for the
higher emissions of your car, skip the next barbecue, and
use the electric range.

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Robert Hancock - 31 May 2004 06:27 GMT

Quite likely this will not work - it will clear up an oxygen sensor heater
code, but may then result in an oxygen sensor slow response code being set.

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Robert Hancock Saskatoon, SK, Canada
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> >> After testing an oxygen sensor for resistance
> >> the heater circuit reads 24,000,000 ohm. Normally
[quoted text clipped - 13 lines]
> higher emissions of your car, skip the next barbecue, and
> use the electric range.

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