I'm pulling the tank today. It looks to me like the pinout of the white connector under the rear seat is different between the 05 STI Doner harness and my 03 WRX Harness.
Quote:
swapped the sensor that is in the RR above the IC tank
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I believe this is the fuel pump controller and not a sensor. P0230 - You might want to try the WRX pump controller and see if it makes a difference. The code is talking about this controller so, you might want to check your install.
You can install the walbro into the STI fuel pump assembly.
I'd verify that the pinout on the white under-seat connector is the same between the doner and this harness.