CEL and raspy exhaust sound

[Red Ride]

I've down some searching and even listened to a few video clips but I'm not convinced I've found the same sound.

It sounds just like there is a plastic bag, or a piece of paper in my exhaust.

It is only really noticeable at low revs, or when I blip the throttle; and it's not that loud. I'm pretty sure it's coming from the center of the car (underneath), not the muffler or turbo. So I'm thinking downpipe cat. Is this an exhaust leak?

About 10 days ago it was raining really hard and I threw an exhaust temp CEL (P1312). However I'm confused because:
1) I've thrown a CEL when it's raining before, and
2) I have a AP stage 2 re-flash.

Mods include: Cat-less UP(without bung), TurboXS turbo-back w/ cat, Cobb stage 2 re-flash.
2002 WRX, ~80,000 miles.

Any help, would be great.

[ryanwrxduksa]

this happened to me today. my egt sensor cam out and i could not boost....

[ktmrider]

Depending on the code you are most likely going into "open loop" or safe mode. I had the same thing happen due to the CEL for the EGT. You still boost but it feels very sluggish and unresponsive until the turbo spools. The sound is from the WG being open at low RPM's.
You did not mention if you have the EGT resistor mod? Could be that the resistor is getting wet and shorting out which will generate the P1312. Once it dries the computer reverts back to normal operation.

[Red Ride]

I do not have a resistor mod. My AP reflash has been keeping me CEL free, well at least most of the time.

As for performance, it's normal. I guess maybe it could be a little down, but I'm not sure.

[Red Ride]

bump