Check all of your vacume lines and waste gate actuator. You can test the WGA by blowing into the vacume line which it is connected to - if you can blow air throguh the WGA its no good.
As long as it dosent leak at six ponds or less it should be fine. Average human lung generated preasure is something like 10-16PSI so a slow leak at your maximum preasure is *probably* ok.
If the WGA leaks at six pounds or less it cant open the wastegate when it should and it needs to be replaced.
did you buy a OEM o2 sensor or the universal one? The reason I ask is about two weeks ago I made the mistake and used a universal one and I kept getting the same code. I ordered the OEM from montgomery mazda for 119.00 shiped no more CEL for me. Just my 2 cents
well, it could give you the problem of not letting you build boost... it could also give you the problem of higher boost spikes, or it could be unaffected at positive boost pressure but leak in vacuum, causing a major vacuum leak.
I've had both the last 2 happen to me. To the OP, do you have a boost gauge on your car?? If you do what are your vacuum and boost readings?? Try blowing into the WGA line to see if it will hold the pressure, but also try either hooking it to a vacuum pump or sucking back through it.... it took me a while to figure out that my ATP replacement wga had gone bad because it held fine when i blew into it, but didn't hold ANY vacuum at all once i finally tried hooking a vacuum pump up.
