Blake_batonrouge Posted May 8, 2008 Share Posted May 8, 2008 Hey guys, I replaced the oxygen sensor on my '91 LS and all was fine. Today I went to lunch and on the way back from the resturant, my CEL comes on and I am getting code 71 EGR system malfunction. Can someone steer me into the right direction for repair. I have cleaned the EGR filter, changed the air filter, and seafoamed. Quote Link to comment Share on other sites More sharing options...
SKperformance Posted May 8, 2008 Share Posted May 8, 2008 egr filter? their is no such thing that i have heard of ? Quote Link to comment Share on other sites More sharing options...
Blake_batonrouge Posted May 8, 2008 Author Share Posted May 8, 2008 egr filter? their is no such thing that i have heard of ? EGR filter DIY Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted May 8, 2008 Share Posted May 8, 2008 Yeah there's a little guy on first gens you can pull out and blow off. Unhook the battery to reset the computer, see if the code comes back.. hopefully it's just a fluke! Quote Link to comment Share on other sites More sharing options...
aarman4 Posted May 9, 2008 Share Posted May 9, 2008 I am having the same issue with my LS, please keep me posted with your results..... I found this link though that may help you out... http://us.lexusownersclub.com/forums/index...lfunction++code Quote Link to comment Share on other sites More sharing options...
Blake_batonrouge Posted May 9, 2008 Author Share Posted May 9, 2008 OKay, I think i got a solution. I noticed that I would get the CEL when I was idling in traffic. I have narrowed it down to either my cracked EGR pipe or just a malfunction in the EGR valve. I took the valve off yesterday and cleaned it out with compressed air. Since the cleaning, I have had no CEL in my morning commute which includes idling and interstate driving. Quote Link to comment Share on other sites More sharing options...
Blake_batonrouge Posted May 19, 2008 Author Share Posted May 19, 2008 Just an update, the CEL is back on again. It does go off once in a while for a few mins after a restart. Everytime I pull the hose I get code "71" EGR System Malfunction. I know my "crack pipe" (egr pipe on back of engine) is shot. Would this be causing all of the problems? Also any ideas would be a great help!!! Thanks Quote Link to comment Share on other sites More sharing options...
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