I've spent a few hours trawling this site for info on P0488 fault code on my 2003 Avensis D4D. I think I've sorted it now and thought I'd share my tale in the hope that I might return the helpful advice. So a few weeks ago my car's engine management light came on, we took the car down to the local Toyota dealers, by which time the light had gone off. They plugged it in and came up with code P0488. They said it was probably some dirt in the EGR valve and it had now cleared - if it was to come bac