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Yeah it actually started with a 02 sensor precat bank 2 code so I replaced it with a new one. Cleared it and it drove fine for a couple months. Then I got the 02 sensor precat bank 1 code so I swapped that as well. Cleared it and drove fine for a week. Now another code is back, more specifically:
273E DME: Oxygen Sensor Final Stage Diagnosis Heater Before Cat. Converter, Bank 1
27B0 DME: Secondary Air System Flow Rate, Bank 1
274B DME: Oxygen Sensor Pump Current Calibration Error Before Cat. Convert, Bank 2
I contacted a shop but they haven't gotten back to me yet. Hoping its not carbon buildup... maybe something with the secondary air pump?
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