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Old 12-02-2019, 09:57 AM   #35
Scooby Newbie
Member#: 235475
Join Date: Jan 2010
Chapter/Region: PRSIC
Location: Puerto Rico
2008 WRX


Can you show me the main harness ground you mention? Iíve messed around with plenty of grounds, polishing and reseating them, so it doesnít come to mind. Iíd like to have another look.

As for the VDC, I believe all 3 C codes you have are CAN comm errors, and theyíll stay on until you fix the connection thatís actually causing the issue. Meaning, there could be another loose ground/connection you mightíve missed.

As for the U code not showing in your case, it probably means your ecu is not the problem. The FSM states that having C0047 and U1221 together, without any other codes, means a faulty ecu, which is my case.

The way to test abs sensors is to get a scanner like I mentioned before that can read them live and see if the speed output from all sensors is the same.
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