How do i get rid/ reset message xc90 "transmission service urgent" i have already taken to volvo dealer about six months ago. they could not pin point issue on diagnostic. Cheers

You first have to retrieve fault codes from your computer network then you have to diagnose the systems/circuits indicated by the fault codes to determine what the cause of the failure is, then you must repair the system/circuit at fault and then reset the computer system. If the dealer cannot do this, I don't know who can. Did they tell you what fault codes they were getting? If so, we can look up the troubleshooting charts for those codes as well as do a Technical Service Bulletin (TSB) search to see if this is a known problem with a known fix. Without the codes, your guess is as good as mine.

I agree with the above poster that you should never "just reset" (and ignore the error message)...

Having said that...

I was able to reset the error message on my 2005 XC90 by doing the following:

1. place key in ignition
2. turn to first click
3. push odometer reset button
4. (within a few seconds) turn key to second position while keeping odometer button pushed down
5. after a few seconds, service light will flash - release odometer button on second flash
6. turn off ignition
7. turn ignition back on to check...1. put key in, turn to position 1
2. hold down

Good luck!