2001 jetta gls 2.0 I have 4 crappy problems!!! Please help me!!

[2001bluejetta]

blue
Hello heres the situation!.......

1.) When I am at a low rpm its bangs on accelleration .And when I am doing 80 mph Iam at almost 4000 rpms!! I paid $200.00 at the dealer for the trans service. NO HELP THERE! (its an automatic).

2.) My ENGINE LIGHT is on the code is a PO171 bank 1 lean, I dont know...

3.) I need a new air bag module$$$$$$ my airbag light is on!

4.) When I open my drivers door the light dont come
on in my car .
Its a 2.0L automatic trans with 42,000 miles on it.
Can anyone please help??
Thank You!!!

[boschmann]

1) Doesn't sound good, was it VW who serviced it? Did they mention it was in limp mode?
2) I'd start with a check for vacuum leaks.
3) Available used from junkyards; http://www.car-part.com
4) Bad door latch switch, unfortunately it's only avalable as part of the latch mechanism.

[2001bluejetta]

Thank you for your help ! The PO171 code turned out to be a bad mass air sensor!
Only 3 more problems to go!!!