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  1. Volvo 700, 800 and 900 series
    I am getting some fault codes that I don't understand for my 1994 850 turbo. First, some history. Over the last 3 years, about every 2-3 months I got a 1-4-3 (knock sensor) code. Some of the information I read stated that the knock sensor seldom goes bad and that it can be related to vac...
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