LSDoc

I addressed this in the forum before and I thought I had the solution, but the problem is back. Even though I replaced the gas cap, I'm still occasionally getting the codes: 0400, 0401, 0406, if I recall the numbers correctly.
Also, I'm seeing my ABS and 'Sport' (Sport suspension) lights flashing most times that I start the car. I have to re-start the car to cancel the flashing lights.

Any ideas???

Thanks, Dan

LSDoc

OK, with all the knowledge base on this forum, nobody has any ideas???

LS430inDE.

What year LS??? Aren't P0400, 0401 and 0406 all EGR related? I know on 2nd gen LS's the EGR pipe/tube degrades over time, and if cracked/damaged, you can hear an audible exhaust leak sound, almost like a helicopter? Any exhaust sounding leaks? How's fuel economy? Did you scan the codes or someone else?

No fuel additives will clean the EGR valve--you'd need to physically remove it. (I just did a search and there's no TITLES of threads related to EGR valve!) Sounds like a good opportunity for a DYI EGR removal & cleaning procedure!

LSDoc

It sounds like you're on to something. I was possibly mistaken in thinking that those codes were related to a faulty fuel cap? Sounds like I'll have to do a lot more searching.

Now, the flashing ABS and 'Sport' lights are probably another story...

LSDoc

BTW, this is a 2001 LS430 UL.

LSDoc

The latest code I got this morning when starting it was: 0440.