LF (2015-2019) Sonata/i45
Hello all, this is my first post here. I currently own a 2016 2.4 Sonata with 127,000 miles. Knock sensor update 953 was performed in 2019 on the car.
Over the last year I have noticed degraded engine performance (weak acceleration, lagging on gas pedal press, upshift when trying to merge like...