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I haven't found a definitive "Regina = Titania" source either. But there was a Regina post a few months ago where the guy (whitefox?) tried a Bosch, then posted back to say it did not work.
And what titania prices I've seen are in the $200 range or more. My gut feel is that FCP just doesn't understand the difference. Based on that earlier post, I don't plan to experiment.
I just found the whitefox post (the last of 4), as follows...
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02 Sensor Experiments 900 1994
posted by someone claiming to be WhiteFox on Sat Sep 6 19:28 EST 2003
Well, I hooked up an oscilloscope to the O2 sensor line today and found that at idle, the voltage stayed near 0 volts indefinitely. That accounts for the setting of the code. As soon as the engine is revved in neutral, the voltage rises to around 1 volt, but slowly drifts down to 0 again.
No quick alternating between 0 and 1 volt as the voltmeter suggested. Obviously, the Bosch universal 3 wire sensor does not work in this system. New Volvo part due to arrive soon, so will report on results after installing it.
-WF
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Search RWD for whitefox to see the whole thread. BY
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Bruce Young,
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.
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