ECM Software Update - Doesn't Look Good!

[DUTCH VanAtlanta]

Dealer did a software update (Campaign 23H3) to the ECM in my 2010 Q7 3.0 TDI yesterday. Since then, the fuel mileage as shown in the cluster has dropped significantly. In 25k miles, I normally average around 20-21 mpg in town driving. Since the update, I am averaging around 17 mpg.

They've either changed something in the engine fuel management or the algorithm used to calculate and display the fuel mileage in the cluster.

This is the same update that turned on the Low AdBlue Warning, although the dealer claims the update could not have done so. Funny thing is that the warning was not activated when I dropped the car off, but was activated when I picked it up after the software update.

Not a happy camper! I have an email in to the Service Manager to see if they can step back the update to the previous one.

[DUTCH VanAtlanta]

Dealer (Gwinnett Audi aka Rick Case Audi) says to call Audi Customer Care. Looks like I need to find another servicing dealer.

[miker]

Use pencil/paper to calculate the fuel tank once you've topped it off, driven till empty, and topped it off again. Maybe it's just a temporary thing that needs to reset or the computer is off. Shouldn't any update have a list of updates that the software addresses? This is the normal procedure for firmware updates in computers.

[DUTCH VanAtlanta]

Originally Posted by miker

Use pencil/paper to calculate the fuel tank once you've topped it off, driven till empty, and topped it off again. Maybe it's just a temporary thing that needs to reset or the computer is off. Shouldn't any update have a list of updates that the software addresses? This is the normal procedure for firmware updates in computers.

When I asked the Service Manager what the update would do, he said he had no idea. As said, I think I need to find another servicing dealer. Their service van is decorated like it belongs in the Clown Posse; and the driver drives like he's practicing to participate there, too. Definitely not Audi class.