InstantForum.NET v4.1.4Boston BMW Chapter Forumhttp://boston-bmwcca.org/InstantForum/BostonForum@boston-bmwcca.orgTue, 06 Jan 2009 04:20:25 GMT20http://boston-bmwcca.org/InstantForum/Topic541-7-1.aspx<br><br>Not all scan tools can retrieve shadow memory or " soft codes". If the tool can, it will tell you which sensor & what exactly the problem is with it relative to a signal short to ground, O2 heater circuit problem etc. So you need to ask the person scanning your car.<br><br>I generally don't replace things until I have a known fault accompanied by a significant error frequency.;)<br><br><br>Fri, 06 Jun 2008 11:04:55 GMTschnellerhttp://boston-bmwcca.org/InstantForum/Topic541-7-1.aspxI was told I'm getting a soft "engine code" that one of my 02 sensors may be going. How do i go about identifying which one it is and should it be replaced now/ The check engine light is not on currently on.Fri, 06 Jun 2008 10:29:57 GMTeyelise