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I recently started my car, had a fairly rough idle for about 10 seconds then all my gauges read 0 and looked like they shut off and then I had the 'Christmas tree' where all the lights lit up (CEL, diff, cruise control all that) I pulled the codes and had the same U0073 and U0155. I reset the codes drove it around for 10-15 minutes with no issues. The next day I start my car and the same thing happens. It clearly appears to be an electrical issue. Has anyone had experience with this or something they've done to fix it? My motor is built still on stock turbo and it is a 2015 STI.
 

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I just got the U0073 code after attaching an obdII bluetooth adapter and running the torque pro app on my phone.

Were you ever able to get to the bottom of this?
 
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