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  1. Engine and Technical Discussion
    Hey all, only been apart of the SS group for maybe 3 months. Picked up a 2016 chevy ss with 9000 miles. Recently a week ago I threw on the KOOKS Catted Long tubes. A week has gone by no CEL until today when driving home. The Codes are : P0420 - U0101 - U0109 The P is from the sensors obviously...
  2. Engine and Technical Discussion
    Not sure if anyone has any thoughts on this, but could use some help…My SS (2017 with 11K miles) has a check engine light that keeps going on and off repeatedly and has caused me to fail the emissions test. It always shows the same three codes: codes are (P0101 - Mass or Volume Air Flow A...
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