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O2 sensor heater control system 200 1989

posted by  Maxspeed on  Wed Dec 31 18:00 CST 1969
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last visit: Mon Jan 20 21:55 CST 2014
[RELATED]

Thanks again Art. The O3 gauge I installed has been in there for a little
over 19 years. I disconnected it just in case but my analog volt meter
still shows no voltage change while idling. And yes I replaced the Bosch O2
sensor with an NTK just because of recommendations from other people having
trouble with the Bosch. But I replaced it because the Bosch was the problem
originally. It was acting exactly like the new sensor. So my problem to
begin with was the fact that I can’t get any voltage to the heater side of
the sensor. I had thought at one time I had seen something about the ECM
activating the heater but now I can’t find anything about it. I either
imagined it or I lost the article I was reading. Maybe I’m just getting too
old to do this stuff anymore. I’ll recheck everything but right now I can’t
figure out why there’s no voltage. Thanks again





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