997 gt3 was parked for a few weeks, the battery was a little weak all along and was long since completely dead so i got a new battery, and upon starting it it had the expected psm light that went away, but also its saying all the tires are flat and none of the front signals or marker lights work anymore, is this common and now needs to be re programmed or??

 

They will all reset after a few minutes. No worries.

 

Get a trickle charger. Even a good battery can fail if the car isn't driven for weeks at a time.

 

Just drive around for 10 minutes and the lights will go away. The ECU just needs to reset itself.