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Old O2 sensor in = CE light out... Why??
Posted by SDBWORKS (more from SDBWORKS) on Sun, 27 Jan 2002 09:10:32
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Ongoing O2 sensor saga - 89 16v n/a - Installed new O2 before Xmas - CE light on almost constantly ever since, been troubleshooting and getting great tips and advice from this group - latest:
I put the old O2 back in Sat - presto! CE light out, idles more or less like it did before, now by comparison not that amazingly different from the new one - definitely can tell the old one is putting out a signal and affecting the mixture. I will run it a few days and then check for codes.
QUESTION - is it possible that my new O2 sensor was defective? I suspect that the preheater circuit never closed, and that, based on 6 weeks of experience with it in the car and multimeter testing, it produced reasonable voltage only at a very specific temperature. Could the sensor or the wires coming out of it been defective?
Any thoughts on a defective O2 sensor, or thoughts on my experience with this? At least I know now it was nothing to do with my splicing job...
TIY,
SDBWORKS
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