I have been reading a lot of posts on this knock sensor problem. But so far I have not found anything concrete here on the problem. My car has been in the Volvo dealer's garage all week and they have not been able to correct it. They have replaced the sensor twice and also the whole wiring harness. I saw a post here that described dirty contacts on the ECU. So I called them and they have done that too and the problem still persists. They are going to have to wait until Monday now, to get in touch with someone back east on the problem.
When and if they figure it out, I will get back on here and let you know what they figured out that it was.
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