I had a check engine light for about a week and today I took it to o‘Reilly for the scanner. I ran 7 codes but only 5 of them were different. I reset my car and the light hasn’t come back yet (been 30 minutes) but the codes were Po138, P1721,P1815, PO615, C1109. Has anybody ran these and are they serious? And will High flow cats run Po138? I’ve had them on for about a month