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Discussion Starter · #1 ·
I've seen posts on code P0171 running lean but I just recently like 30 min ago haha got a cel with a p0172 while idleing, I don't have no rough idling or anything but I did stall out earlier today any ideas on what to check.? I have a invidia j straight pipe to some ets axleback mufflers and the big sf air box with the Cobb AP stage 2 tune I haven't gotten it pro tuned as the the nearest tuner can only street tune due to there dyno not being all wheel drive any ideas on we're I should start
thank you
 

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PO172 and PO171 are troubleshot the same way. Proceed as if it's a PO171.
 

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Discussion Starter · #3 ·
PO172 and PO171 are troubleshot the same way. Proceed as if it's a PO171.
okay well another question in those forums they don't say that they have a hill start and traction control light also come on the dash with the check engine light I have a 2016 wrx by the way
 
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