What year? You sure it's P1171, I'm not seeing that listed.
I am working through P0170 P0171 P117B for my supercharged 2017 BRZ.
This should link you to the manual for TS-ing
https://demos.starbase7.net/t3Portal..._rm_index.html
Definitely agree with logging. If you haven't used datazap it's amazing.