I agree with PK. If I had to guess, I'd say that the guys in the shop you went to probably saw abnormal tire wear on your rear tires and that made them think the tires were leaning inwards.

It's more likely that any abnormal rear tire wear actually happened when the rear tires were on the front, then they got rotated to the back. If that's what happened, then if your front tires aren't already wearing like that, they will over time unless you do get a front-end alignment. On a VX, an alignment and properly inflated tires are the best way to keep tires wearing like they should.

As far as your 0401 EGR problem goes, some have had luck just taking it off, giving it a good cleaning with a product like CRC throttle-body and air intake cleaner, then simply putting it back on (new gaskets seem optional). It's located at the back of the engine on the passenger side near the firewall.

http://www.vehicross.info/forums/sho...&highlight=egr