The only posts I've seen on this over the years have been 3 or 4 in the past month or so....so, I'd say it's not a common failure. But all of our cars (850's esp.) are getting up there in years and we're finally starting to see some "other" part failures, so it's not surprising. Reset the code, if it doesn't come back, don't worry about it. If it does, suspect the wiring or the connecting points first before buying a new sensor. After re-reading what Klaus and others have posted, this makes good sense.
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1998 S70 T5 Emarald Green Metallic, 2004 V70 2.5T Ruby Red, Previous Owner of Black '94 850 Turbo Wagon. My cars have been running so well lately they've got me worried.