DiscoStu Posted November 20, 2007 Share Posted November 20, 2007 99 Legacy OBW CEL light is on, code says something about EGR flow. I've read all the posts and how to make sure there is no obstruction. Just don't know where the thing is. Does anyone have a diagram of the parts I should be checking? Any other advice would be appreciated. Thanks Quote Link to comment Share on other sites More sharing options...
nipper Posted November 20, 2007 Share Posted November 20, 2007 What is the specific code? nipper Quote Link to comment Share on other sites More sharing options...
subaru360 Posted November 20, 2007 Share Posted November 20, 2007 The egr valve is on rear driver's side of the intake manifold. You'll see a metal pipe going down from it to the rear of the driver's side cylinder head. Quote Link to comment Share on other sites More sharing options...
xrturbo Posted November 20, 2007 Share Posted November 20, 2007 There are many components to the EGR system that could cause the code. Quote Link to comment Share on other sites More sharing options...
porcupine73 Posted November 20, 2007 Share Posted November 20, 2007 The EGR codes can be a pain. This http://www.endwrench.com article has some good info about EGR troubleshooting: Subaru Emissions System Service Quote Link to comment Share on other sites More sharing options...
DiscoStu Posted November 21, 2007 Author Share Posted November 21, 2007 What is the specific code? nipper It's a code P0400. EGR Flow Malfunction Quote Link to comment Share on other sites More sharing options...
xrturbo Posted November 24, 2007 Share Posted November 24, 2007 I have had quite a few instances of it being the EGR transducer which is that plastic disc with the green label right in front of the EGR valve. Unfortunately the easiest way I have found to trouble shoot this is to have test parts hanging around, all of the parts interchange for all of the ealy style (95-99) cars. Quote Link to comment Share on other sites More sharing options...
urabusman Posted November 24, 2007 Share Posted November 24, 2007 Be sure to check the vacuum line on the right side of the engine that goes to the map sensor on the right shock tower. There is a inline filter that plugs up and sets the same code. The filter is a round plastic cylinder. If you blow thru the line you can tell if it is plugged. When the filter plugs the map does not see the drop in vacuum when the EGR is activated and assumes it is not working. Then it sets the code. Quote Link to comment Share on other sites More sharing options...
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