just to let anyone know that may have read this, it was a bad PCM/ECU. They installed a new one a few months ago to satisfy the recall, and it must have been defective, which caused the harsh downshifts. another replacement PCM (no charge thank god),and problem solved!

I've got an 05' automatic, 55k mi, with a fresh PCM via a recall, installed a couple months back.My problem seems to be on the downshifting when I decelerate. It seems to bog at times before it finally shifts. I was passing through a bumpy intersection so I slowed without braking, and it seemed like...

thanks again for the info Ken. My CEL hasnt returned since I got the recalled ECM replaced , but the moment it does, the gasket is comin' out.Ralph

thanks neebishis.Got the new PCM in, and it doesnt seem to be running any better. I also went ahead and put in new plugs. They were NGK's, 6.99 each.Looks like intake gasket may be next. Got an idea where a thread is to guide me thru it?Thanks

Had probs with my 2006 Vibe, code p0171. Crappy MPG, uneven idling. Went thru the usual fixes, replaced PCV, and cleaned, then replaced MAS. CEL keeps returning same code.After some digging, found out about an active PCM recall thru a Toyota website (toyotanation) for the Matrix. (they call it the E...