This is a 2006 S40 T5. Wasn't sure if I should post here or in the S40/V40 where I've posted before on my 2003 V40.

Just purchased the car car at auction and knew it would need some work. Of course, it needs a lot more than I expected.

When I first got the car it had a P0089 error code. This morning I checked and there are three more codes: P0193, P2178 and P0170.

I went to Rockauto.com and bought a fuel filter and of course it is not a correct part. Waste of money.

I then started looking for a real fuel filter and I see that in the parts manual there appears to be one external to the tank and also one in the tank. Do US spec cars have an external fuel filter? This car entered the US via Puerto Rico, so I don't know if it is truely a US spec car or not. I can not find the external filter - where would it be if it had one.

When I look at the parts list for the filter in the tank, I see the pump but I don't see a filter listed in my parts listing. Without a part number, how would I replace it? Would it come on a new pump.

Is there a pressure regulator? I haven't been able to find one listed.

So I know this is a bunch of questions, but I am confused on just how many and the locations of the fuel filters and if it is in the tank how do I order one. And what is the part number for the fuel reglator if there is one.