Hi,

Recently I swapped in a 2.2L engine in my 1996 Auto Outback for the stock 2.5L. I was expecting the ECU to throw a code having to do with the evap canister but instead I get a pressure sensor code (PO106 I think is was). One thing I noticed was the small plastic air filter thingy that is attached in-line with the vacuum tube coming from the MAP sensor was missing when I got my car back. I remember once before when that tube was totally disconnected I would get that code. Should the filter be there?

 

I know I can't get around some kind of code (at least not without a complicated procedure from what I've read) but should I be getting this particular code?

 

Thanks for your input!

 

--Damien

You need the solenoid that's there, which is called the pressure exchange solenoid. It switches open so the pressure sensor can take barometric pressure readings. The filter should be there so you don't get junk inside the solenoid and pressure sensor.