This is the code i just got, its a check engine light but everything is running good, anybody know what the code is P1640 QDM1

here you go

http://www.bonnevilleclub.com/forum/...fa9f5263b7a518

yes...it'*

Boost Soleniod
Evap Purge Valve Soleniod (charcoal canister connection)
or TCC soleniod

I'm trying to figure mine out as well...everything seems great.but it kicks a code nearly every time I drive it.

does the code go away after a certain amount of time???

Each time I start the car it'* like the movie ground hog day. No lights on everything is great in the world. Drive down the road, if it'* wet TC works great, if dry...TC light is probably coming on. Then the check engine light is gonna come on and it'* a waiting game. Usually pops on when I get off the gas. Which made me think evap purge...but I replaced it w/one from a junkyard and no difference.

Need to pull out the book and do real troubleshooting. Just tough on an intermittant problem. I am almost thinking TCC but it is working fine. Each time you tap the brake after it'* engaged it disengages.