SwedeSpeed - Volvo Performance Forum banner
1 - 1 of 1 Posts

· Premium Member
9,296 Posts
Re: (Eric_H)

Quote, originally posted by Eric_H »
I had a new software download installed because of a SERVICE ENGINE warning. Should I have turned my headlights back down prior to this upload?

No, an ECM update does not affect the SUM. And, if you did happen to get a SUM recalibration, if your headlights are pointed where you want them, then you're good to go.

1 - 1 of 1 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.