1989gsxr750

Recently purchased an 05 A8L with 68000 miles, having a problem filling the gas tank. When I take the gas cap off there is significant hissing coming for the tank. I've read some threads on fuel filler vent and also a flip over valve of some sort. If anyone has any ideas please share. Besides this the tpms error is coming up and not reading any sensors, should I assume the batteries are dead in the modules? Thabks to anyone willing to help!

Brozee

Yes tpms batteries dead. Search the threads for topics covering that. As for the hissing, no idea personally.