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I was drive home today a noticed a buzzing noise from under the dash. Followed by the CEL light up with 3 codes; P0731 Gear I Incorrect ratio,P0733 Gear 3 Incorrect ratio, P0750 Shift Solenoid A Malfunction. The car seems to drive normal and i reset the codes but I'm still hearing a buzzing when I from start it and shift into gear (Automatic) and after a bit it goes away. Anyone have this problem before?