lowsixfo64 Posted May 26, 2005 Report Share Posted May 26, 2005 btw, thanks for the info in same previous post. the 3 way catalyst low efficiency code continues to plague me. (po420) do i need new o2 sensors or what could it be. car is a 00 deville northstar with 58k. Thanks Link to comment Share on other sites More sharing options...
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