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ODB use 900

I'm sorry but I am new to Volvos and am having a time of it. Can anyone tell me if the check engine light must be on for a valid ODB code to appear? I have a 940 turbo with one problem after another but no check engine codes at the moment. Just fixed a knock engine problem that I detected through the odb but have another problem 2 days later. Thanks!






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New ODB use [900]
posted by  jjb  on Fri Jul 23 04:01 CST 2004 >
  • New ODB use [900]
    posted by  someone claiming to be nate  on Fri Jul 23 05:09 CST 2004 >


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