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Well I did replace my upstream O2 sensors about a year ago BUT I used Denso’s not OEM GM I will get new OEM’s and see what happens
Update: So, I replaced the AirAid Modular Intake Tube, #200-996 back to stock and ordered two new upstream Genuine GM # 2133866 O2 sensors from RA. I sure hope this solved the P219A issue.Well I did replace my upstream O2 sensors about a year ago BUT I used Denso’s not OEM GM I will get new OEM’s and see what happens