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    Looking for Help Diagnosing a Turbo Issue

    Hello Sonic Friends, TLDR: My 2014 Sonic is intermittently throwing both P0299 and P0234 - turbo overboost and underboost condition. I need some help troubleshooting a longstanding issue with my 2014 Sonic. I appreciate any suggestions or pointers. My Sonic has about 150,000 miles on the...
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