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I have a 2015 Sonic RS 1.4 L turbo With K&N Cold Air intake 37,000 miles . This started about a week ago. I went and got a different gas from Route 66 and 2 days later I had the light come on. I then went to auto zone to read the code and it came up P0171. They said to run a fuel injector...

I'm looking into cold air intakes like k&n but not sure which one or other brand names that may be good. I've looked into blowoff valves as well, and in the near future maybe a tuner upgrade. And just wondering if it is possible to get upgrades on the turbo itself. Please share:) Sent from my...