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Old 12-03-2012, 11:35 AM   #1
Scooby Newbie
Member#: 299478
Join Date: Oct 2011
Chapter/Region: E. Canada
Location: Montreal
2008 WRX

Default P0171 + Really bad fuel economy

I started getting P0171 code (System Too Lean) about 2 months ago. I get one every 2-3 weeks. It always happens when I am stopped at a red light.

Since it started, my fuel consumption has been really bad. Before, it was around 21 MPG but now I do 16 MPG.

Other than that, the car drives fine (no idle problem, no loss of power)

What could be the problem?
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