A few months ago, my SES light came on with the 1406 (EGR pintle position) Diagnostic Trouble Code. I finally replaced the EGR valve and all was well for a few weeks. Twice now, in the last 2 weeks, the SES lamp has come on and the code is 1406 again! Any ideas to pursue now? Thanks, Buster '96 SL-1 99K miles